From 6e20d00158f31f7631d68b86996b7e951c4451c8 Mon Sep 17 00:00:00 2001
From: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Date: Fri, 29 Oct 2021 15:03:15 -0700
Subject: [PATCH] ibmvnic: Process crqs after enabling interrupts
References: bsc#1192273 ltc#194629
Patch-mainline: v5.16-rc1
Git-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: 032c5e82847a ("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>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/net/ethernet/ibm/ibmvnic.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 7438138c3766..84961a83803b 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -5412,6 +5412,9 @@ 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:
--
2.31.1