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ibmvnic: Process crqs after enabling interrupts

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[ Upstream commit 6e20d00158f31f7631d68b86996b7e951c4451c8 ]

Soon after registering a CRQ it is possible that we get a fail over or
maybe a CRQ_INIT from the VIOS while interrupts were disabled.

Look for any such CRQs after enabling interrupts.

Otherwise we can intermittently fail to bring up ibmvnic adapters during
boot, specially in kexec/kdump kernels.

Fixes: 032c5e8284 ("Driver for IBM System i/p VNIC protocol")
Reported-by: Vaishnavi Bhat <vaish123@in.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sukadev Bhattiprolu 2021-10-29 15:03:15 -07:00 committed by Greg Kroah-Hartman
parent 5b3f720419
commit a3fdcd16b1
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/ibm/ibmvnic.c
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@ -5185,6 +5185,9 @@ static int init_crq_queue(struct ibmvnic_adapter *adapter)
crq->cur = 0;
spin_lock_init(&crq->lock);
/* process any CRQs that were queued before we enabled interrupts */
tasklet_schedule(&adapter->tasklet);
return retrc;
req_irq_failed: