This patch is created from pcnet32.c v1.32. it will allow users to
specify RX ring size upon module
insertion via module parameter 'rx_log_size'. This is needed in some
cases where too small the rx ring
size will cause RX errors upon remote installation via pcnet32 NIC card.
Signed-off-by: Wen Hsin Chang <[EMAIL PROTECTED]>
----------------------------------------------------------------------------------------------------
--- a/drivers/net/pcnet32.c 2006-03-30 09:49:10.000000000 +0800
+++ b/drivers/net/pcnet32.c 2006-05-15 11:14:45.000000000 +0800
@@ -93,6 +93,9 @@ static struct net_device *pcnet32_dev;
static int max_interrupt_work = 2;
static int rx_copybreak = 200;
+/* Module parameter to specify RX ring size at module insertion */
+static int rx_log_size = 0;
+
#define PCNET32_PORT_AUI 0x00
#define PCNET32_PORT_10BT 0x01
#define PCNET32_PORT_GPSI 0x02
@@ -1264,7 +1267,10 @@ pcnet32_probe1(unsigned long ioaddr, int
lp->name = chipname;
lp->shared_irq = shared;
lp->tx_ring_size = TX_RING_SIZE; /* default tx ring size */
- lp->rx_ring_size = RX_RING_SIZE; /* default rx ring size */
+ if (!rx_log_size)
+ lp->rx_ring_size = RX_RING_SIZE; /* default rx ring size */
+ else
+ lp->rx_ring_size = (1 << (rx_log_size));
lp->tx_mod_mask = lp->tx_ring_size - 1;
lp->rx_mod_mask = lp->rx_ring_size - 1;
lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
@@ -2707,6 +2713,11 @@ module_param(tx_start_pt, int, 0);
MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
module_param(pcnet32vlb, int, 0);
MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support
(0/1)");
+
+/* Module parameter to specify RX ring size at module insertion */
+module_param(rx_log_size, int, 0);
+MODULE_PARM_DESC(rx_log_size, DRV_NAME " RX Ring Buffer Size (log_2
#BUF) ");
+
module_param_array(options, int, NULL, 0);
MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
module_param_array(full_duplex, int, NULL, 0);
@@ -2731,6 +2742,12 @@ static int __init pcnet32_init_module(vo
if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
tx_start = tx_start_pt;
+
+ /* validating rx_log_size */
+ if ((rx_log_size <= 0) ||
+ (rx_log_size > PCNET32_LOG_MAX_RX_BUFFERS))
+ rx_log_size = 0;
+
/* find the PCI devices */
if (!pci_module_init(&pcnet32_driver))
-
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