From df7e714d6d6ca7921be2e5c7d599d9b4aa96d682 Mon Sep 17 00:00:00 2001 From: Mete Durlu Date: Thu, 4 Jul 2024 14:10:06 +0200 Subject: [PATCH] s390/diag: Diag204 add busy return errno 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 Reviewed-by: Tobias Huschle Signed-off-by: Mete Durlu Signed-off-by: Vasily Gorbik --- arch/s390/kernel/diag.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c index 9f33dcecbffa..9b65f04c83de 100644 --- a/arch/s390/kernel/diag.c +++ b/arch/s390/kernel/diag.c @@ -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; }