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authorKarsten Graul <kgraul@linux.ibm.com>2020-07-26 20:34:27 +0200
committerDavid S. Miller <davem@davemloft.net>2020-07-27 10:30:01 -0700
commit211e5b7a0007e6a172eafdb89c512768f82d73bf (patch)
tree35123f4dd8d7452897655949f7af6ab8039da460 /drivers/s390
parentd21a06d5d8268fb2d5e542c9e189db0556fc534c (diff)
downloadlinux-211e5b7a0007e6a172eafdb89c512768f82d73bf.tar.bz2
s390/ism: indicate correct error reason in ism_alloc_dmb()
When the ism driver allocates a new dmb in ism_alloc_dmb() it must first check for and reserve a slot in the sba bitmap. When find_next_zero_bit() finds no free slot then the return code is -ENOMEM. This code conflicts with the error when the alloc() fails later in the code. As a result of that the caller can not differentiate between out-of-memory conditions and sba-bitmap-full conditions. Fix that by using the return code -ENOSPC when the sba slot reservation failed. Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/ism_drv.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
index c7fade836d83..5fbe9eae84d1 100644
--- a/drivers/s390/net/ism_drv.c
+++ b/drivers/s390/net/ism_drv.c
@@ -231,7 +231,7 @@ static int ism_alloc_dmb(struct ism_dev *ism, struct smcd_dmb *dmb)
bit = find_next_zero_bit(ism->sba_bitmap, ISM_NR_DMBS,
ISM_DMB_BIT_OFFSET);
if (bit == ISM_NR_DMBS)
- return -ENOMEM;
+ return -ENOSPC;
dmb->sba_idx = bit;
}