ibmvnic: don't spin in tasklet

stable inclusion
from stable-v5.10.96
commit 0a60d04abc62b8cbf93fbd9d5f6f1eddad2004ec
bugzilla: https://gitee.com/openeuler/kernel/issues/I55NWB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0a60d04abc62b8cbf93fbd9d5f6f1eddad2004ec

--------------------------------

[ Upstream commit 48079e7f ]

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: 249168ad ("ibmvnic: Make CRQ interrupt tasklet wait for all capabilities crqs")
Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: NDany Madden <drt@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYu Liao <liaoyu15@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/ibm/ibmvnic.c

@@ -5079,12 +5079,6 @@ 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