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NVMe: Check for DMA mapping failure

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If dma_map_sg returns 0 (failure), we need to fail the I/O.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Matthew Wilcox 2011-02-10 12:01:09 -05:00
parent d567760c40
commit 1974b1ae88
1 changed files with 7 additions and 1 deletions
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8
drivers/block/nvme.c
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@ -451,7 +451,8 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
dma_dir = DMA_FROM_DEVICE;
}
nvme_map_bio(nvmeq->q_dmadev, nbio, bio, dma_dir, psegs);
if (nvme_map_bio(nvmeq->q_dmadev, nbio, bio, dma_dir, psegs) == 0)
goto mapping_failed;
cmnd->rw.flags = 1;
cmnd->rw.command_id = cmdid;
@ -471,6 +472,11 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
return 0;
mapping_failed:
free_nbio(nvmeq, nbio);
bio_endio(bio, -ENOMEM);
return 0;
free_nbio:
free_nbio(nvmeq, nbio);
congestion: