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NVMe: Translate NVMe status to errno

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This returns a more appropriate error for the "capacity exceeded"
status. In case other NVMe statuses have a better errno, this patch adds
a convience function to translate an NVMe status code to an errno for
IO commands, defaulting to the current -EIO.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2014-08-29 09:06:12 -06:00 committed by Jens Axboe
parent 695a4fe79f
commit b4ff9c8ddb
1 changed files with 13 additions and 1 deletions
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14
drivers/block/nvme-core.c
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@ -450,6 +450,18 @@ static void nvme_end_io_acct(struct bio *bio, unsigned long start_time)
}
}
static int nvme_error_status(u16 status)
{
switch (status & 0x7ff) {
case NVME_SC_SUCCESS:
return 0;
case NVME_SC_CAP_EXCEEDED:
return -ENOSPC;
default:
return -EIO;
}
}
static void bio_completion(struct nvme_queue *nvmeq, void *ctx,
struct nvme_completion *cqe)
{
@ -469,7 +481,7 @@ static void bio_completion(struct nvme_queue *nvmeq, void *ctx,
wake_up(&nvmeq->sq_full);
return;
}
error = -EIO;
error = nvme_error_status(status);
}
if (iod->nents) {
dma_unmap_sg(nvmeq->q_dmadev, iod->sg, iod->nents,