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block: nvme-scsi: Catch kcalloc failure 

res variable was initialized to -ENOMEM, but it's override by
nvme_trans_copy_from_user(). So current code returns 0 if kcalloc fails.
Fix it to return proper error code.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Axel Lin 2015-06-20 16:29:14 +08:00 committed by Jens Axboe
parent 71feb364e7
commit 51ef72bda7
1 changed files with 4 additions and 2 deletions
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6
drivers/block/nvme-scsi.c
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@ -2375,7 +2375,7 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
struct scsi_unmap_parm_list *plist;
struct nvme_dsm_range *range;
struct nvme_command c;
int i, nvme_sc, res = -ENOMEM;
int i, nvme_sc, res;
u16 ndesc, list_len;
list_len = get_unaligned_be16(&cmd[7]);
@ -2397,8 +2397,10 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
}
range = kcalloc(ndesc, sizeof(*range), GFP_KERNEL);
if (!range)
if (!range) {
res = -ENOMEM;
goto out;
}
for (i = 0; i < ndesc; i++) {
range[i].nlb = cpu_to_le32(be32_to_cpu(plist->desc[i].nlb));