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s390/sclp: Suppress unnecessary Store Data warning

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On systems that do not support Store Data events (such as when running
as KVM guest) the following warning message appears during boot:

 sclp_sd: Store Data request failed (eq=2, di=3, response=0x40f0,
          flags=0x00, status=0, rc=-5)

This warning does not add any useful information since the result is
expected due to missing support for that event type.

Suppress this message by checking the associated masks of supported
events before issuing a Store Data event.

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Peter Oberparleiter 2024-06-20 14:20:26 +02:00 committed by Alexander Gordeev
parent f219af8a3f
commit ecec74bbfc
1 changed files with 4 additions and 0 deletions
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4
drivers/s390/char/sclp_sd.c
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@ -194,6 +194,10 @@ static int sclp_sd_sync(unsigned long page, u8 eq, u8 di, u64 sat, u64 sa,
struct sclp_sd_evbuf *evbuf;
int rc;
if (!sclp_sd_register.sclp_send_mask ||
!sclp_sd_register.sclp_receive_mask)
return -EIO;
sclp_sd_listener_init(&listener, __pa(sccb));
sclp_sd_listener_add(&listener);