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authorChristoph Hellwig <hch@lst.de>2015-10-12 21:23:39 +0200
committerJens Axboe <axboe@fb.com>2015-10-15 09:04:36 -0600
commit1951feae88c5a39105a704188ccf910faf1d0c50 (patch)
treecf85d3d53b4a69fb2758c48594d4b54bf7ad7223 /drivers/nvme
parent3d42e67fe5ebc1e5c3aae9b1037e38ec99a362cc (diff)
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>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/pci.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index ad58ee3c3b57..f73c574d59f5 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -606,8 +606,8 @@ 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;
if (unlikely(status)) {
if (!(status & NVME_SC_DNR || blk_noretry_request(req))
@@ -624,9 +624,11 @@ 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);
}
}
@@ -638,7 +640,7 @@ 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,
@@ -652,7 +654,7 @@ 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. */