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nvme: use an integer value to Linux errno values 

Use a separate integer variable to hold the signed Linux errno
values we pass back to the block layer.  Note that for pass through
commands those might still be NVMe values, but those fit into the
int as well.

Fixes: f4829a9b7a61: ("blk-mq: fix racy updates of rq->errors")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2015-10-12 21:23:39 +02:00 committed by Jens Axboe
parent f42d79ab67
commit 81c04b9438
1 changed files with 7 additions and 5 deletions
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12
drivers/block/nvme-core.c
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@ -603,8 +603,8 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
struct nvme_iod *iod = ctx;
struct request *req = iod_get_private(iod);
struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req);
u16 status = le16_to_cpup(&cqe->status) >> 1;
int error = 0;
if (unlikely(status)) {
if (!(status & NVME_SC_DNR || blk_noretry_request(req))
@ -621,9 +621,11 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
if (req->cmd_type == REQ_TYPE_DRV_PRIV) {
if (cmd_rq->ctx == CMD_CTX_CANCELLED)
status = -EINTR;
error = -EINTR;
else
error = status;
} else {
status = nvme_error_status(status);
error = nvme_error_status(status);
}
}
@ -635,7 +637,7 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
if (cmd_rq->aborted)
dev_warn(nvmeq->dev->dev,
"completing aborted command with status:%04x\n",
status);
error);
if (iod->nents) {
dma_unmap_sg(nvmeq->dev->dev, iod->sg, iod->nents,
@ -649,7 +651,7 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
}
nvme_free_iod(nvmeq->dev, iod);
blk_mq_complete_request(req, status);
blk_mq_complete_request(req, error);
}
/* length is in bytes. gfp flags indicates whether we may sleep. */