Subject: [PATCH net 3/4] ibmvnic: don't spin in tasklet

From: Sukadev Bhattiprolu <[email-masked]>
Date: Fri, 21 Jan 2022 18:59:20 -0800

ibmvnic_tasklet() continuously spins waiting for responses to all
capability requests. It does this to avoid encountering an error
during initialization of the vnic. However if there is a bug in the
VIOS and we do not receive a response to one or more queries the
tasklet ends up spinning continuously leading to hard lock ups.

If we fail to receive a message from the VIOS it is reasonable to
timeout the login attempt rather than spin indefinitely in the tasklet.

Fixes: 249168ad07cd ("ibmvnic: Make CRQ interrupt tasklet wait for all capabilities crqs")
Signed-off-by: Sukadev Bhattiprolu <[email-masked]>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index acd488310bbc..682a440151a8 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -5491,12 +5491,6 @@ static void ibmvnic_tasklet(struct tasklet_struct *t)
 			ibmvnic_handle_crq(crq, adapter);
 			crq->generic.first = 0;
 		}
-
-		/* remain in tasklet until all
-		 * capabilities responses are received
-		 */
-		if (!adapter->wait_capability)
-			done = true;
 	}
 	/* if capabilities CRQ's were sent in this tasklet, the following
 	 * tasklet must wait until all responses are received
-- 
2.27.0