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s390/diag: Diag204 add busy return errno

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When diag204-busy-indication facility is installed, diag204 can return
'8' which means device is busy and no operation is done. Add check for
return codes of diag204 call. Return error codes according to diag204
return codes.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Mete Durlu 2024-07-04 14:10:06 +02:00 committed by Vasily Gorbik
parent bb9be93acb
commit df7e714d6d
1 changed files with 5 additions and 1 deletions
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6
arch/s390/kernel/diag.c
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@ -185,6 +185,8 @@ int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
}
EXPORT_SYMBOL(diag14);
#define DIAG204_BUSY_RC 8
static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
{
union register_pair rp = { .even = *subcode, .odd = size };
@ -223,7 +225,9 @@ int diag204(unsigned long subcode, unsigned long size, void *addr)
addr = (void *)pfn_to_phys(vmalloc_to_pfn(addr));
diag_stat_inc(DIAG_STAT_X204);
size = __diag204(&subcode, size, addr);
if (subcode)
if (subcode == DIAG204_BUSY_RC)
return -EBUSY;
else if (subcode)
return -EOPNOTSUPP;
return size;
}