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tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes 

The driver function tg3_io_error_detected() calls napi_disable twice,
without an intervening napi_enable, when the number of EEH errors exceeds
eeh_max_freezes, resulting in an indefinite sleep while holding rtnl_lock.

Add check for pcierr_recovery which skips code already executed for the
"Frozen" state.

Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sunxi64-5.8
David Christensen 2020-06-17 11:51:17 -07:00 committed by David S. Miller
parent 4c98045c9b
commit 3a2656a211
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/broadcom/tg3.c
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@ -18168,8 +18168,8 @@ static pci_ers_result_t tg3_io_error_detected(struct pci_dev *pdev,
rtnl_lock();
/* We probably don't have netdev yet */
if (!netdev || !netif_running(netdev))
/* Could be second call or maybe we don't have netdev yet */
if (!netdev || tp->pcierr_recovery || !netif_running(netdev))
goto done;
/* We needn't recover from permanent error */