Approved by:   kib (mentor, blanket)
 Differential Revision: https://reviews.freebsd.org/D23630 
<https://reviews.freebsd.org/D23639>

> On 24 Feb 2020, at 11:51, Pawel Biernacki <kak...@freebsd.org> wrote:
> 
> Author: kaktus
> Date: Mon Feb 24 10:51:26 2020
> New Revision: 358286
> URL: https://svnweb.freebsd.org/changeset/base/358286
> 
> Log:
>  Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (15 of many)
> 
>  r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
>  still not MPSAFE (or already are but aren’t properly marked).
>  Use it in preparation for a general review of all nodes.
> 
>  This is non-functional change that adds annotations to SYSCTL_NODE and
>  SYSCTL_PROC nodes using one of the soon-to-be-required flags.
> 
> Modified:
>  head/sys/dev/e1000/if_em.c
>  head/sys/dev/ixgbe/if_bypass.c
>  head/sys/dev/ixgbe/if_ix.c
>  head/sys/dev/ixgbe/if_ixv.c
>  head/sys/dev/ixl/if_iavf.c
>  head/sys/dev/ixl/if_ixl.c
>  head/sys/dev/ixl/ixl_pf_main.c
>  head/sys/dev/ixl/ixl_txrx.c
> 
> Modified: head/sys/dev/e1000/if_em.c
> ==============================================================================
> --- head/sys/dev/e1000/if_em.c        Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/e1000/if_em.c        Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -459,7 +459,8 @@ static driver_t igb_if_driver = {
> #define CSUM_TSO      0
> #endif
> 
> -static SYSCTL_NODE(_hw, OID_AUTO, em, CTLFLAG_RD, 0, "EM driver parameters");
> +static SYSCTL_NODE(_hw, OID_AUTO, em, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
> +    "EM driver parameters");
> 
> static int em_disable_crc_stripping = 0;
> SYSCTL_INT(_hw_em, OID_AUTO, disable_crc_stripping, CTLFLAG_RDTUN,
> @@ -785,27 +786,29 @@ em_if_attach_pre(if_ctx_t ctx)
>       /* SYSCTL stuff */
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "nvm", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
> -         em_sysctl_nvm_info, "I", "NVM Information");
> +         OID_AUTO, "nvm", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, em_sysctl_nvm_info, "I", "NVM Information");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "debug", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
> -         em_sysctl_debug_info, "I", "Debug Information");
> +         OID_AUTO, "debug", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, em_sysctl_debug_info, "I", "Debug Information");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "fc", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
> -         em_set_flowcntl, "I", "Flow Control");
> +         OID_AUTO, "fc", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, em_set_flowcntl, "I", "Flow Control");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "reg_dump", CTLTYPE_STRING | CTLFLAG_RD, adapter, 0,
> +         OID_AUTO, "reg_dump",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter, 0,
>           em_get_regs, "A", "Dump Registers");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "rs_dump", CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
> +         OID_AUTO, "rs_dump",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, adapter, 0,
>           em_get_rs, "I", "Dump RS indexes");
> 
>       /* Determine hardware and mac info */
> @@ -1020,7 +1023,8 @@ em_if_attach_pre(if_ctx_t ctx)
>       hw->dev_spec.ich8lan.eee_disable = eee_setting;
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "eee_control", CTLTYPE_INT|CTLFLAG_RW,
> +         OID_AUTO, "eee_control",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, em_sysctl_eee, "I",
>           "Disable Energy Efficient Ethernet");
> 
> @@ -4081,13 +4085,13 @@ em_add_hw_stats(struct adapter *adapter)
>                       CTLFLAG_RD, &adapter->watchdog_events,
>                       "Watchdog timeouts");
>       SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "device_control",
> -                     CTLTYPE_UINT | CTLFLAG_RD, adapter, E1000_CTRL,
> -                     em_sysctl_reg_handler, "IU",
> -                     "Device Control Register");
> +         CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
> +         adapter, E1000_CTRL, em_sysctl_reg_handler, "IU",
> +         "Device Control Register");
>       SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_control",
> -                     CTLTYPE_UINT | CTLFLAG_RD, adapter, E1000_RCTL,
> -                     em_sysctl_reg_handler, "IU",
> -                     "Receiver Control Register");
> +         CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
> +         adapter, E1000_RCTL, em_sysctl_reg_handler, "IU",
> +         "Receiver Control Register");
>       SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "fc_high_water",
>                       CTLFLAG_RD, &adapter->hw.fc.high_water, 0,
>                       "Flow Control High Watermark");
> @@ -4099,19 +4103,17 @@ em_add_hw_stats(struct adapter *adapter)
>               struct tx_ring *txr = &tx_que->txr;
>               snprintf(namebuf, QUEUE_NAME_LEN, "queue_tx_%d", i);
>               queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
> -                                         CTLFLAG_RD, NULL, "TX Queue Name");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "TX Queue Name");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_head",
> -                             CTLTYPE_UINT | CTLFLAG_RD, adapter,
> -                             E1000_TDH(txr->me),
> -                             em_sysctl_reg_handler, "IU",
> -                             "Transmit Descriptor Head");
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter,
> +                 E1000_TDH(txr->me), em_sysctl_reg_handler, "IU",
> +                 "Transmit Descriptor Head");
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_tail",
> -                             CTLTYPE_UINT | CTLFLAG_RD, adapter,
> -                             E1000_TDT(txr->me),
> -                             em_sysctl_reg_handler, "IU",
> -                             "Transmit Descriptor Tail");
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter,
> +                 E1000_TDT(txr->me), em_sysctl_reg_handler, "IU",
> +                 "Transmit Descriptor Tail");
>               SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "tx_irq",
>                               CTLFLAG_RD, &txr->tx_irq,
>                               "Queue MSI-X Transmit Interrupts");
> @@ -4121,19 +4123,17 @@ em_add_hw_stats(struct adapter *adapter)
>               struct rx_ring *rxr = &rx_que->rxr;
>               snprintf(namebuf, QUEUE_NAME_LEN, "queue_rx_%d", j);
>               queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
> -                                         CTLFLAG_RD, NULL, "RX Queue Name");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "RX Queue Name");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_head",
> -                             CTLTYPE_UINT | CTLFLAG_RD, adapter,
> -                             E1000_RDH(rxr->me),
> -                             em_sysctl_reg_handler, "IU",
> -                             "Receive Descriptor Head");
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter,
> +                 E1000_RDH(rxr->me), em_sysctl_reg_handler, "IU",
> +                 "Receive Descriptor Head");
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_tail",
> -                             CTLTYPE_UINT | CTLFLAG_RD, adapter,
> -                             E1000_RDT(rxr->me),
> -                             em_sysctl_reg_handler, "IU",
> -                             "Receive Descriptor Tail");
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter,
> +                 E1000_RDT(rxr->me), em_sysctl_reg_handler, "IU",
> +                 "Receive Descriptor Tail");
>               SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "rx_irq",
>                               CTLFLAG_RD, &rxr->rx_irq,
>                               "Queue MSI-X Receive Interrupts");
> @@ -4142,7 +4142,7 @@ em_add_hw_stats(struct adapter *adapter)
>       /* MAC stats get their own sub node */
> 
>       stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac_stats",
> -                                 CTLFLAG_RD, NULL, "Statistics");
> +         CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Statistics");
>       stat_list = SYSCTL_CHILDREN(stat_node);
> 
>       SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "excess_coll",
> @@ -4293,7 +4293,7 @@ em_add_hw_stats(struct adapter *adapter)
>       /* Interrupt Stats */
> 
>       int_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "interrupts",
> -                                 CTLFLAG_RD, NULL, "Interrupt Statistics");
> +         CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Interrupt Statistics");
>       int_list = SYSCTL_CHILDREN(int_node);
> 
>       SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "asserts",
> @@ -4435,7 +4435,7 @@ em_add_int_delay_sysctl(struct adapter *adapter, const
>       info->value = value;
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(adapter->dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)),
> -         OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW,
> +         OID_AUTO, name, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           info, 0, em_sysctl_int_delay, "I", description);
> }
> 
> 
> Modified: head/sys/dev/ixgbe/if_bypass.c
> ==============================================================================
> --- head/sys/dev/ixgbe/if_bypass.c    Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/ixgbe/if_bypass.c    Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -746,50 +746,51 @@ ixgbe_bypass_init(struct adapter *adapter)
>        */
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "bypass_log", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "bypass_log",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_log, "I", "Bypass Log");
> 
>       /* All other setting are hung from the 'bypass' node */
>       bp_node = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
> -         OID_AUTO, "bypass", CTLFLAG_RD, NULL, "Bypass");
> +         OID_AUTO, "bypass", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Bypass");
> 
>       bp_list = SYSCTL_CHILDREN(bp_node);
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "version", CTLTYPE_INT | CTLFLAG_RD,
> +         OID_AUTO, "version", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_version, "I", "Bypass Version");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_set_state, "I", "Bypass State");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "timeout", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "timeout", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_timeout, "I", "Bypass Timeout");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "main_on", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "main_on", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_main_on, "I", "Bypass Main On");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "main_off", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "main_off", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_main_off, "I", "Bypass Main Off");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "aux_on", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "aux_on", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_aux_on, "I", "Bypass Aux On");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "aux_off", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "aux_off", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_aux_off, "I", "Bypass Aux Off");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "wd_set", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "wd_set", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_wd_set, "I", "Set BP Watchdog");
> 
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), bp_list,
> -         OID_AUTO, "wd_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "wd_reset", CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           adapter, 0, ixgbe_bp_wd_reset, "S", "Bypass WD Reset");
> 
>       adapter->feat_en |= IXGBE_FEATURE_BYPASS;
> 
> Modified: head/sys/dev/ixgbe/if_ix.c
> ==============================================================================
> --- head/sys/dev/ixgbe/if_ix.c        Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/ixgbe/if_ix.c        Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -285,7 +285,8 @@ static device_method_t ixgbe_if_methods[] = {
>  * TUNEABLE PARAMETERS:
>  */
> 
> -static SYSCTL_NODE(_hw, OID_AUTO, ix, CTLFLAG_RD, 0, "IXGBE driver 
> parameters");
> +static SYSCTL_NODE(_hw, OID_AUTO, ix, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
> +    "IXGBE driver parameters");
> static driver_t ixgbe_if_driver = {
>   "ixgbe_if", ixgbe_if_methods, sizeof(struct adapter)
> };
> @@ -1546,14 +1547,14 @@ ixgbe_add_hw_stats(struct adapter *adapter)
>               struct tx_ring *txr = &tx_que->txr;
>               snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
>               queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
> -                 CTLFLAG_RD, NULL, "Queue Name");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_head",
> -                 CTLTYPE_UINT | CTLFLAG_RD, txr, 0,
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, txr, 0,
>                   ixgbe_sysctl_tdh_handler, "IU", "Transmit Descriptor Head");
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_tail",
> -                 CTLTYPE_UINT | CTLFLAG_RD, txr, 0,
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, txr, 0,
>                   ixgbe_sysctl_tdt_handler, "IU", "Transmit Descriptor Tail");
>               SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "tso_tx",
>                   CTLFLAG_RD, &txr->tso_tx, "TSO");
> @@ -1566,21 +1567,22 @@ ixgbe_add_hw_stats(struct adapter *adapter)
>               struct rx_ring *rxr = &rx_que->rxr;
>               snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
>               queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
> -                 CTLFLAG_RD, NULL, "Queue Name");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "interrupt_rate",
> -                 CTLTYPE_UINT | CTLFLAG_RW, &adapter->rx_queues[i], 0,
> +                 CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +                 &adapter->rx_queues[i], 0,
>                   ixgbe_sysctl_interrupt_rate_handler, "IU",
>                   "Interrupt Rate");
>               SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "irqs",
>                   CTLFLAG_RD, &(adapter->rx_queues[i].irqs),
>                   "irqs on this queue");
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_head",
> -                 CTLTYPE_UINT | CTLFLAG_RD, rxr, 0,
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, rxr, 0,
>                   ixgbe_sysctl_rdh_handler, "IU", "Receive Descriptor Head");
>               SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_tail",
> -                 CTLTYPE_UINT | CTLFLAG_RD, rxr, 0,
> +                 CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, rxr, 0,
>                   ixgbe_sysctl_rdt_handler, "IU", "Receive Descriptor Tail");
>               SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "rx_packets",
>                   CTLFLAG_RD, &rxr->rx_packets, "Queue Packets Received");
> @@ -1595,7 +1597,7 @@ ixgbe_add_hw_stats(struct adapter *adapter)
>       /* MAC stats get their own sub node */
> 
>       stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac_stats",
> -         CTLFLAG_RD, NULL, "MAC Statistics");
> +         CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "MAC Statistics");
>       stat_list = SYSCTL_CHILDREN(stat_node);
> 
>       SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "crc_errs",
> @@ -2528,37 +2530,42 @@ ixgbe_add_device_sysctls(if_ctx_t ctx)
> 
>       /* Sysctls for all devices */
>       SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "fc",
> -         CTLTYPE_INT | CTLFLAG_RW, adapter, 0, ixgbe_sysctl_flowcntl, "I",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, ixgbe_sysctl_flowcntl, "I",
>           IXGBE_SYSCTL_DESC_SET_FC);
> 
>       SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "advertise_speed",
> -         CTLTYPE_INT | CTLFLAG_RW, adapter, 0, ixgbe_sysctl_advertise, "I",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, ixgbe_sysctl_advertise, "I",
>           IXGBE_SYSCTL_DESC_ADV_SPEED);
> 
> #ifdef IXGBE_DEBUG
>       /* testing sysctls (for all devices) */
>       SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "power_state",
> -         CTLTYPE_INT | CTLFLAG_RW, adapter, 0, ixgbe_sysctl_power_state,
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, ixgbe_sysctl_power_state,
>           "I", "PCI Power State");
> 
>       SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "print_rss_config",
> -         CTLTYPE_STRING | CTLFLAG_RD, adapter, 0,
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter, 0,
>           ixgbe_sysctl_print_rss_config, "A", "Prints RSS Configuration");
> #endif
>       /* for X550 series devices */
>       if (hw->mac.type >= ixgbe_mac_X550)
>               SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "dmac",
> -                 CTLTYPE_U16 | CTLFLAG_RW, adapter, 0, ixgbe_sysctl_dmac,
> +                 CTLTYPE_U16 | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +                 adapter, 0, ixgbe_sysctl_dmac,
>                   "I", "DMA Coalesce");
> 
>       /* for WoL-capable devices */
>       if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T) {
>               SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "wol_enable",
> -                 CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, adapter, 0,
>                   ixgbe_sysctl_wol_enable, "I", "Enable/Disable Wake on LAN");
> 
>               SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "wufc",
> -                 CTLTYPE_U32 | CTLFLAG_RW, adapter, 0, ixgbe_sysctl_wufc,
> +                 CTLTYPE_U32 | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +                 adapter, 0, ixgbe_sysctl_wufc,
>                   "I", "Enable/Disable Wake Up Filters");
>       }
> 
> @@ -2568,22 +2575,24 @@ ixgbe_add_device_sysctls(if_ctx_t ctx)
>               struct sysctl_oid_list *phy_list;
> 
>               phy_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "phy",
> -                 CTLFLAG_RD, NULL, "External PHY sysctls");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "External PHY sysctls");
>               phy_list = SYSCTL_CHILDREN(phy_node);
> 
>               SYSCTL_ADD_PROC(ctx_list, phy_list, OID_AUTO, "temp",
> -                 CTLTYPE_U16 | CTLFLAG_RD, adapter, 0, ixgbe_sysctl_phy_temp,
> +                 CTLTYPE_U16 | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
> +                 adapter, 0, ixgbe_sysctl_phy_temp,
>                   "I", "Current External PHY Temperature (Celsius)");
> 
>               SYSCTL_ADD_PROC(ctx_list, phy_list, OID_AUTO,
> -                 "overtemp_occurred", CTLTYPE_U16 | CTLFLAG_RD, adapter, 0,
> +                 "overtemp_occurred",
> +                 CTLTYPE_U16 | CTLFLAG_RD | CTLFLAG_NEEDGIANT, adapter, 0,
>                   ixgbe_sysctl_phy_overtemp_occurred, "I",
>                   "External PHY High Temperature Event Occurred");
>       }
> 
>       if (adapter->feat_cap & IXGBE_FEATURE_EEE) {
>               SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "eee_state",
> -                 CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, adapter, 0,
>                   ixgbe_sysctl_eee_state, "I", "EEE Power Save State");
>       }
> } /* ixgbe_add_device_sysctls */
> 
> Modified: head/sys/dev/ixgbe/if_ixv.c
> ==============================================================================
> --- head/sys/dev/ixgbe/if_ixv.c       Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/ixgbe/if_ixv.c       Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -418,8 +418,8 @@ ixv_if_attach_pre(if_ctx_t ctx)
>       /* SYSCTL APIs */
>       SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
>           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "debug",
> -         CTLTYPE_INT | CTLFLAG_RW, adapter, 0, ixv_sysctl_debug, "I",
> -         "Debug Info");
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
> +         adapter, 0, ixv_sysctl_debug, "I", "Debug Info");
> 
>       /* Determine hardware revision */
>       ixv_identify_hardware(ctx);
> @@ -1803,7 +1803,7 @@ ixv_add_stats_sysctls(struct adapter *adapter)
>               struct tx_ring *txr = &tx_que->txr;
>               snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
>               queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
> -                 CTLFLAG_RD, NULL, "Queue Name");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "tso_tx",
> @@ -1816,7 +1816,7 @@ ixv_add_stats_sysctls(struct adapter *adapter)
>               struct rx_ring *rxr = &rx_que->rxr;
>               snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
>               queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
> -                 CTLFLAG_RD, NULL, "Queue Name");
> +                 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "irqs",
> @@ -1830,7 +1830,8 @@ ixv_add_stats_sysctls(struct adapter *adapter)
>       }
> 
>       stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac",
> -         CTLFLAG_RD, NULL, "VF Statistics (read from HW registers)");
> +         CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
> +         "VF Statistics (read from HW registers)");
>       stat_list = SYSCTL_CHILDREN(stat_node);
> 
>       SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_pkts_rcvd",
> 
> Modified: head/sys/dev/ixl/if_iavf.c
> ==============================================================================
> --- head/sys/dev/ixl/if_iavf.c        Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/ixl/if_iavf.c        Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -201,7 +201,7 @@ static driver_t iavf_if_driver = {
> ** TUNEABLE PARAMETERS:
> */
> 
> -static SYSCTL_NODE(_hw, OID_AUTO, iavf, CTLFLAG_RD, 0,
> +static SYSCTL_NODE(_hw, OID_AUTO, iavf, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
>     "iavf driver parameters");
> 
> /*
> @@ -2049,23 +2049,27 @@ iavf_add_device_sysctls(struct iavf_sc *sc)
>       struct sysctl_oid_list *debug_list;
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "current_speed", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "current_speed",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_current_speed, "A", "Current Port Speed");
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "tx_itr", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "tx_itr",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_tx_itr, "I",
>           "Immediately set TX ITR value for all queues");
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "rx_itr", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "rx_itr",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_rx_itr, "I",
>           "Immediately set RX ITR value for all queues");
> 
>       /* Add sysctls meant to print debug information, but don't list them
>        * in "sysctl -a" output. */
>       debug_node = SYSCTL_ADD_NODE(ctx, ctx_list,
> -         OID_AUTO, "debug", CTLFLAG_RD | CTLFLAG_SKIP, NULL, "Debug 
> Sysctls");
> +         OID_AUTO, "debug", CTLFLAG_RD | CTLFLAG_SKIP | CTLFLAG_NEEDGIANT,
> +         NULL, "Debug Sysctls");
>       debug_list = SYSCTL_CHILDREN(debug_node);
> 
>       SYSCTL_ADD_UINT(ctx, debug_list,
> @@ -2077,19 +2081,23 @@ iavf_add_device_sysctls(struct iavf_sc *sc)
>           &sc->dbg_mask, 0, "Non-shared code debug message level");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "filter_list", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "filter_list",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_sw_filter_list, "A", "SW Filter List");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "queue_interrupt_table", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "queue_interrupt_table",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_queue_interrupt_table, "A", "View MSI-X indices 
> for TX/RX queues");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "do_vf_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "do_vf_reset",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_vf_reset, "A", "Request a VF reset from PF");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "do_vflr_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "do_vflr_reset",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           sc, 0, iavf_sysctl_vflr_reset, "A", "Request a VFLR reset from HW");
> 
>       /* Add stats sysctls */
> 
> Modified: head/sys/dev/ixl/if_ixl.c
> ==============================================================================
> --- head/sys/dev/ixl/if_ixl.c Mon Feb 24 10:47:18 2020        (r358285)
> +++ head/sys/dev/ixl/if_ixl.c Mon Feb 24 10:51:26 2020        (r358286)
> @@ -206,7 +206,7 @@ static driver_t ixl_if_driver = {
> ** TUNEABLE PARAMETERS:
> */
> 
> -static SYSCTL_NODE(_hw, OID_AUTO, ixl, CTLFLAG_RD, 0,
> +static SYSCTL_NODE(_hw, OID_AUTO, ixl, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
>     "ixl driver parameters");
> 
> /*
> 
> Modified: head/sys/dev/ixl/ixl_pf_main.c
> ==============================================================================
> --- head/sys/dev/ixl/ixl_pf_main.c    Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/ixl/ixl_pf_main.c    Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -1632,8 +1632,8 @@ ixl_add_sysctls_mac_stats(struct sysctl_ctx_list *ctx,
>       struct sysctl_oid_list *child,
>       struct i40e_hw_port_stats *stats)
> {
> -     struct sysctl_oid *stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, 
> "mac",
> -                                 CTLFLAG_RD, NULL, "Mac Statistics");
> +     struct sysctl_oid *stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO,
> +         "mac", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Mac Statistics");
>       struct sysctl_oid_list *stat_list = SYSCTL_CHILDREN(stat_node);
> 
>       struct i40e_eth_stats *eth_stats = &stats->eth;
> @@ -3121,38 +3121,45 @@ ixl_add_device_sysctls(struct ixl_pf *pf)
> 
>       /* Set up sysctls */
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "fc", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "fc", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_set_flowcntl, "I", IXL_SYSCTL_HELP_FC);
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "advertise_speed", CTLTYPE_INT | CTLFLAG_RW,
> -         pf, 0, ixl_sysctl_set_advertise, "I", 
> IXL_SYSCTL_HELP_SET_ADVERTISE);
> +         OID_AUTO, "advertise_speed",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_set_advertise, "I", IXL_SYSCTL_HELP_SET_ADVERTISE);
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "supported_speeds", CTLTYPE_INT | CTLFLAG_RD,
> -         pf, 0, ixl_sysctl_supported_speeds, "I", 
> IXL_SYSCTL_HELP_SUPPORTED_SPEED);
> +         OID_AUTO, "supported_speeds",
> +         CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_supported_speeds, "I", IXL_SYSCTL_HELP_SUPPORTED_SPEED);
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "current_speed", CTLTYPE_STRING | CTLFLAG_RD,
> -         pf, 0, ixl_sysctl_current_speed, "A", "Current Port Speed");
> +         OID_AUTO, "current_speed",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_current_speed, "A", "Current Port Speed");
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "fw_version", CTLTYPE_STRING | CTLFLAG_RD,
> -         pf, 0, ixl_sysctl_show_fw, "A", "Firmware version");
> +         OID_AUTO, "fw_version",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_show_fw, "A", "Firmware version");
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "unallocated_queues", CTLTYPE_INT | CTLFLAG_RD,
> -         pf, 0, ixl_sysctl_unallocated_queues, "I",
> +         OID_AUTO, "unallocated_queues",
> +         CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_unallocated_queues, "I",
>           "Queues not allocated to a PF or VF");
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "tx_itr", CTLTYPE_INT | CTLFLAG_RW,
> -         pf, 0, ixl_sysctl_pf_tx_itr, "I",
> +         OID_AUTO, "tx_itr",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_pf_tx_itr, "I",
>           "Immediately set TX ITR value for all queues");
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "rx_itr", CTLTYPE_INT | CTLFLAG_RW,
> -         pf, 0, ixl_sysctl_pf_rx_itr, "I",
> +         OID_AUTO, "rx_itr",
> +         CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +         ixl_sysctl_pf_rx_itr, "I",
>           "Immediately set RX ITR value for all queues");
> 
>       SYSCTL_ADD_INT(ctx, ctx_list,
> @@ -3166,38 +3173,48 @@ ixl_add_device_sysctls(struct ixl_pf *pf)
>       /* Add FEC sysctls for 25G adapters */
>       if (i40e_is_25G_device(hw->device_id)) {
>               fec_node = SYSCTL_ADD_NODE(ctx, ctx_list,
> -                 OID_AUTO, "fec", CTLFLAG_RD, NULL, "FEC Sysctls");
> +                 OID_AUTO, "fec", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
> +                 "FEC Sysctls");
>               fec_list = SYSCTL_CHILDREN(fec_node);
> 
>               SYSCTL_ADD_PROC(ctx, fec_list,
> -                 OID_AUTO, "fc_ability", CTLTYPE_INT | CTLFLAG_RW,
> -                 pf, 0, ixl_sysctl_fec_fc_ability, "I", "FC FEC ability 
> enabled");
> +                 OID_AUTO, "fc_ability",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +                 ixl_sysctl_fec_fc_ability, "I", "FC FEC ability enabled");
> 
>               SYSCTL_ADD_PROC(ctx, fec_list,
> -                 OID_AUTO, "rs_ability", CTLTYPE_INT | CTLFLAG_RW,
> -                 pf, 0, ixl_sysctl_fec_rs_ability, "I", "RS FEC ability 
> enabled");
> +                 OID_AUTO, "rs_ability",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +                 ixl_sysctl_fec_rs_ability, "I", "RS FEC ability enabled");
> 
>               SYSCTL_ADD_PROC(ctx, fec_list,
> -                 OID_AUTO, "fc_requested", CTLTYPE_INT | CTLFLAG_RW,
> -                 pf, 0, ixl_sysctl_fec_fc_request, "I", "FC FEC mode 
> requested on link");
> +                 OID_AUTO, "fc_requested",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +                 ixl_sysctl_fec_fc_request, "I",
> +                 "FC FEC mode requested on link");
> 
>               SYSCTL_ADD_PROC(ctx, fec_list,
> -                 OID_AUTO, "rs_requested", CTLTYPE_INT | CTLFLAG_RW,
> -                 pf, 0, ixl_sysctl_fec_rs_request, "I", "RS FEC mode 
> requested on link");
> +                 OID_AUTO, "rs_requested",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +                 ixl_sysctl_fec_rs_request, "I",
> +                 "RS FEC mode requested on link");
> 
>               SYSCTL_ADD_PROC(ctx, fec_list,
> -                 OID_AUTO, "auto_fec_enabled", CTLTYPE_INT | CTLFLAG_RW,
> -                 pf, 0, ixl_sysctl_fec_auto_enable, "I", "Let FW decide FEC 
> ability/request modes");
> +                 OID_AUTO, "auto_fec_enabled",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, pf, 0,
> +                 ixl_sysctl_fec_auto_enable, "I",
> +                 "Let FW decide FEC ability/request modes");
>       }
> 
>       SYSCTL_ADD_PROC(ctx, ctx_list,
> -         OID_AUTO, "fw_lldp", CTLTYPE_INT | CTLFLAG_RW,
> +         OID_AUTO, "fw_lldp", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_fw_lldp, "I", IXL_SYSCTL_HELP_FW_LLDP);
> 
>       /* Add sysctls meant to print debug information, but don't list them
>        * in "sysctl -a" output. */
>       debug_node = SYSCTL_ADD_NODE(ctx, ctx_list,
> -         OID_AUTO, "debug", CTLFLAG_RD | CTLFLAG_SKIP, NULL, "Debug 
> Sysctls");
> +         OID_AUTO, "debug", CTLFLAG_RD | CTLFLAG_SKIP | CTLFLAG_MPSAFE, NULL,
> +         "Debug Sysctls");
>       debug_list = SYSCTL_CHILDREN(debug_node);
> 
>       SYSCTL_ADD_UINT(ctx, debug_list,
> @@ -3209,77 +3226,95 @@ ixl_add_device_sysctls(struct ixl_pf *pf)
>           &pf->dbg_mask, 0, "Non-shared code debug message level");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "link_status", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "link_status",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_link_status, "A", IXL_SYSCTL_HELP_LINK_STATUS);
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "phy_abilities", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "phy_abilities",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_phy_abilities, "A", "PHY Abilities");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "filter_list", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "filter_list",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_sw_filter_list, "A", "SW Filter List");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "hw_res_alloc", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "hw_res_alloc",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_hw_res_alloc, "A", "HW Resource Allocation");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "switch_config", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "switch_config",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_switch_config, "A", "HW Switch Configuration");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "rss_key", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "rss_key",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_hkey, "A", "View RSS key");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "rss_lut", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "rss_lut",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_hlut, "A", "View RSS lookup table");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "rss_hena", CTLTYPE_ULONG | CTLFLAG_RD,
> +         OID_AUTO, "rss_hena",
> +         CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_hena, "LU", "View enabled packet types for RSS");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "disable_fw_link_management", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "disable_fw_link_management",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_fw_link_management, "I", "Disable FW Link 
> Management");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "dump_debug_data", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "dump_debug_data",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_dump_debug_data, "A", "Dump Debug Data from FW");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "do_pf_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "do_pf_reset",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_do_pf_reset, "I", "Tell HW to initiate a PF 
> reset");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "do_core_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "do_core_reset",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_do_core_reset, "I", "Tell HW to initiate a CORE 
> reset");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "do_global_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "do_global_reset",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_do_global_reset, "I", "Tell HW to initiate a 
> GLOBAL reset");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "do_emp_reset", CTLTYPE_INT | CTLFLAG_WR,
> +         OID_AUTO, "do_emp_reset",
> +         CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_do_emp_reset, "I",
>           "(This doesn't work) Tell HW to initiate a EMP (entire firmware) 
> reset");
> 
>       SYSCTL_ADD_PROC(ctx, debug_list,
> -         OID_AUTO, "queue_interrupt_table", CTLTYPE_STRING | CTLFLAG_RD,
> +         OID_AUTO, "queue_interrupt_table",
> +         CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>           pf, 0, ixl_sysctl_queue_interrupt_table, "A", "View MSI-X indices 
> for TX/RX queues");
> 
>       if (pf->has_i2c) {
>               SYSCTL_ADD_PROC(ctx, debug_list,
> -                 OID_AUTO, "read_i2c_byte", CTLTYPE_INT | CTLFLAG_RW,
> +                 OID_AUTO, "read_i2c_byte",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>                   pf, 0, ixl_sysctl_read_i2c_byte, "I", 
> IXL_SYSCTL_HELP_READ_I2C);
> 
>               SYSCTL_ADD_PROC(ctx, debug_list,
> -                 OID_AUTO, "write_i2c_byte", CTLTYPE_INT | CTLFLAG_RW,
> +                 OID_AUTO, "write_i2c_byte",
> +                 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
>                   pf, 0, ixl_sysctl_write_i2c_byte, "I", 
> IXL_SYSCTL_HELP_WRITE_I2C);
> 
>               SYSCTL_ADD_PROC(ctx, debug_list,
> -                 OID_AUTO, "read_i2c_diag_data", CTLTYPE_STRING | CTLFLAG_RD,
> +                 OID_AUTO, "read_i2c_diag_data",
> +                 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
>                   pf, 0, ixl_sysctl_read_i2c_diag_data, "A", "Dump selected 
> diagnostic data from FW");
>       }
> }
> 
> Modified: head/sys/dev/ixl/ixl_txrx.c
> ==============================================================================
> --- head/sys/dev/ixl/ixl_txrx.c       Mon Feb 24 10:47:18 2020        
> (r358285)
> +++ head/sys/dev/ixl/ixl_txrx.c       Mon Feb 24 10:51:26 2020        
> (r358286)
> @@ -850,7 +850,7 @@ ixl_add_vsi_sysctls(device_t dev, struct ixl_vsi *vsi,
>       tree = device_get_sysctl_tree(dev);
>       child = SYSCTL_CHILDREN(tree);
>       vsi->vsi_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, sysctl_name,
> -                                CTLFLAG_RD, NULL, "VSI Number");
> +         CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "VSI Number");
>       vsi_list = SYSCTL_CHILDREN(vsi->vsi_node);
> 
>       ixl_add_sysctls_eth_stats(ctx, vsi_list, &vsi->eth_stats);
> @@ -911,7 +911,8 @@ ixl_add_queues_sysctls(device_t dev, struct ixl_vsi *v
>               bzero(queue_namebuf, sizeof(queue_namebuf));
>               snprintf(queue_namebuf, QUEUE_NAME_LEN, "rxq%02d", q);
>               queue_node = SYSCTL_ADD_NODE(ctx, vsi_list,
> -                 OID_AUTO, queue_namebuf, CTLFLAG_RD, NULL, "RX Queue #");
> +                 OID_AUTO, queue_namebuf, CTLFLAG_RD | CTLFLAG_MPSAFE,
> +                 NULL, "RX Queue #");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               rx_que = &(vsi->rx_queues[q]);
> @@ -938,7 +939,8 @@ ixl_add_queues_sysctls(device_t dev, struct ixl_vsi *v
>               bzero(queue_namebuf, sizeof(queue_namebuf));
>               snprintf(queue_namebuf, QUEUE_NAME_LEN, "txq%02d", q);
>               queue_node = SYSCTL_ADD_NODE(ctx, vsi_list,
> -                 OID_AUTO, queue_namebuf, CTLFLAG_RD, NULL, "TX Queue #");
> +                 OID_AUTO, queue_namebuf, CTLFLAG_RD | CTLFLAG_MPSAFE,
> +                 NULL, "TX Queue #");
>               queue_list = SYSCTL_CHILDREN(queue_node);
> 
>               tx_que = &(vsi->tx_queues[q]);

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