From 1974b1ae8852324a75fb8cfecbc7b758fd5a2c3c Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Thu, 10 Feb 2011 12:01:09 -0500 Subject: [PATCH] NVMe: Check for DMA mapping failure If dma_map_sg returns 0 (failure), we need to fail the I/O. Signed-off-by: Matthew Wilcox --- drivers/block/nvme.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c index 2948043483fe..bfdca3a3a41a 100644 --- a/drivers/block/nvme.c +++ b/drivers/block/nvme.c @@ -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: -- 2.39.5