From: Krzysztof Goreczny <krzysztof.gorec...@intel.com>
There is a possibility of race between ice_open or ice_stop calls
performed by OS and reset handling routine both trying to modify VSI
resources. Observed scenarios:
- reset handler deallocates memory in ice_vsi_free_arrays and ice_open
tries to access it in ice_vsi_cfg_txq leading to driver crash
- reset handler deallocates memory in ice_vsi_free_arrays and ice_close
tries to access it in ice_down leading to driver crash
- reset handler clears port scheduler topology and sets port state to
ICE_SCHED_PORT_STATE_INIT leading to ice_ena_vsi_txq fail in ice_open
To prevent this additional checks in ice_open and ice_stop are
introduced to make sure that OS is not allowed to alter VSI config while
reset is in progress.
Fixes: cdedef59deb0 ("ice: Configure VSIs for Tx/Rx")
Signed-off-by: Krzysztof Goreczny <krzysztof.gorec...@intel.com>
Tested-by: Tony Brelinski <tonyx.brelin...@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.ngu...@intel.com>
---
drivers/net/ethernet/intel/ice/ice.h | 1 +
drivers/net/ethernet/intel/ice/ice_lib.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_main.c | 28 +++++++++++++++++++++++
3 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice.h
b/drivers/net/ethernet/intel/ice/ice.h
index 357706444dd5..1d4518638215 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -642,6 +642,7 @@ int ice_fdir_create_dflt_rules(struct ice_pf *pf);
int ice_aq_wait_for_event(struct ice_pf *pf, u16 opcode, unsigned long timeout,
struct ice_rq_event_info *event);
int ice_open(struct net_device *netdev);
+int ice_open_internal(struct net_device *netdev);
int ice_stop(struct net_device *netdev);
void ice_service_task_schedule(struct ice_pf *pf);
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c
b/drivers/net/ethernet/intel/ice/ice_lib.c
index 8d4e2ad4328d..7ac2beaed95c 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2620,7 +2620,7 @@ int ice_ena_vsi(struct ice_vsi *vsi, bool locked)
if (!locked)
rtnl_lock();
- err = ice_open(vsi->netdev);
+ err = ice_open_internal(vsi->netdev);
if (!locked)
rtnl_unlock();
@@ -2649,7 +2649,7 @@ void ice_dis_vsi(struct ice_vsi *vsi, bool locked)
if (!locked)
rtnl_lock();
- ice_stop(vsi->netdev);
+ ice_vsi_close(vsi);
if (!locked)
rtnl_unlock();
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c
b/drivers/net/ethernet/intel/ice/ice_main.c
index 53e053c997eb..255a07c1e33a 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -6632,6 +6632,28 @@ static void ice_tx_timeout(struct net_device *netdev,
unsigned int txqueue)
* Returns 0 on success, negative value on failure
*/
int ice_open(struct net_device *netdev)
+{
+ struct ice_netdev_priv *np = netdev_priv(netdev);
+ struct ice_pf *pf = np->vsi->back;
+
+ if (ice_is_reset_in_progress(pf->state)) {
+ netdev_err(netdev, "can't open net device while reset is in
progress");
+ return -EBUSY;
+ }
+
+ return ice_open_internal(netdev);
+}
+
+/**
+ * ice_open_internal - Called when a network interface becomes active
+ * @netdev: network interface device structure
+ *
+ * Internal ice_open implementation. Should not be used directly except for
ice_open and reset
+ * handling routine
+ *
+ * Returns 0 on success, negative value on failure
+ */
+int ice_open_internal(struct net_device *netdev)
{
struct ice_netdev_priv *np = netdev_priv(netdev);
struct ice_vsi *vsi = np->vsi;
@@ -6712,6 +6734,12 @@ int ice_stop(struct net_device *netdev)
{
struct ice_netdev_priv *np = netdev_priv(netdev);
struct ice_vsi *vsi = np->vsi;
+ struct ice_pf *pf = vsi->back;
+
+ if (ice_is_reset_in_progress(pf->state)) {
+ netdev_err(netdev, "can't stop net device while reset is in
progress");
+ return -EBUSY;
+ }
ice_vsi_close(vsi);
--
2.26.2
