From 411b0109daa52d1cc5be39635631e22a5590c5d8 Mon Sep 17 00:00:00 2001 From: Tony Krowiak Date: Tue, 15 Aug 2023 14:43:24 -0400 Subject: [PATCH] s390/vfio-ap: wait for response code 05 to clear on queue reset Response code 05, AP busy, is a valid response code for a ZAPQ or TAPQ. Instead of returning error -EIO when a ZAPQ fails with response code 05, let's wait until the queue is no longer busy and try the ZAPQ again. Signed-off-by: Tony Krowiak Acked-by: Janosch Frank Tested-by: Viktor Mihajlovski Link: https://lore.kernel.org/r/20230815184333.6554-4-akrowiak@linux.ibm.com Signed-off-by: Heiko Carstens --- drivers/s390/crypto/vfio_ap_ops.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index be92ba45226d9..3f67cfb53d0cd 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1611,6 +1611,7 @@ static int apq_status_check(int apqn, struct ap_queue_status *status) case AP_RESPONSE_DECONFIGURED: return 0; case AP_RESPONSE_RESET_IN_PROGRESS: + case AP_RESPONSE_BUSY: return -EBUSY; default: WARN(true, @@ -1663,6 +1664,7 @@ retry_zapq: } break; case AP_RESPONSE_RESET_IN_PROGRESS: + case AP_RESPONSE_BUSY: /* * There is a reset issued by another process in progress. Let's wait * for that to complete. Since we have no idea whether it was a RAPQ or -- 2.30.2