提交 211e5b7a 编写于 作者: K Karsten Graul 提交者: David S. Miller

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: NUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: NKarsten Graul <kgraul@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 d21a06d5
......@@ -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;
}
......
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