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be2net: Fix invocation of be_close() after be_clear() 

In the EEH error recovery path, when a permanent failure occurs,
we clean up adapter structure (i.e. destroy queues etc) by calling
be_clear() and return PCI_ERS_RESULT_DISCONNECT.
After this the stack tries to remove device from bus and calls
be_remove() which invokes netdev_unregister()->be_close().
be_close() operating on destroyed queues results in a
NULL dereference.

This patch fixes this problem by introducing a flag to keep track
of the setup state.

Signed-off-by: Kalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kalesh AP 2014-04-14 16:12:41 +05:30 committed by David S. Miller
parent 1a3d0717f6
commit e1ad8e33d2
2 changed files with 9 additions and 0 deletions
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1
drivers/net/ethernet/emulex/benet/be.h
View File

@ -374,6 +374,7 @@ enum vf_state {
#define BE_FLAGS_NAPI_ENABLED (1 << 9)
#define BE_FLAGS_QNQ_ASYNC_EVT_RCVD (1 << 11)
#define BE_FLAGS_VXLAN_OFFLOADS (1 << 12)
#define BE_FLAGS_SETUP_DONE (1 << 13)
#define BE_UC_PMAC_COUNT 30
#define BE_VF_UC_PMAC_COUNT 2

8
drivers/net/ethernet/emulex/benet/be_main.c
View File

@ -2726,6 +2726,12 @@ static int be_close(struct net_device *netdev)
struct be_eq_obj *eqo;
int i;
/* This protection is needed as be_close() may be called even when the
* adapter is in cleared state (after eeh perm failure)
*/
if (!(adapter->flags & BE_FLAGS_SETUP_DONE))
return 0;
be_roce_dev_close(adapter);
if (adapter->flags & BE_FLAGS_NAPI_ENABLED) {
@ -3056,6 +3062,7 @@ static int be_clear(struct be_adapter *adapter)
be_clear_queues(adapter);
be_msix_disable(adapter);
adapter->flags &= ~BE_FLAGS_SETUP_DONE;
return 0;
}
@ -3560,6 +3567,7 @@ static int be_setup(struct be_adapter *adapter)
adapter->phy.fc_autoneg = 1;
be_schedule_worker(adapter);
adapter->flags |= BE_FLAGS_SETUP_DONE;
return 0;
err:
be_clear(adapter);