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| author | Tejun Heo <htejun@gmail.com> | 2005-11-05 14:29:01 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-11-05 14:29:01 -0500 |
| commit | 537a95d9351f41cc3c24ddb2a646aedd6debb21b (patch) | |
| tree | e3bd5b05c2d396db3eb59997d3cc1b9e54df0ba6 | |
| parent | fecb4a0c87c2bcaee1f3cf800126eef752a07ed3 (diff) | |
| download | linux-537a95d9351f41cc3c24ddb2a646aedd6debb21b.tar.gz | |
[libata] restore sg on DMA mapping failure
| -rw-r--r-- | drivers/scsi/libata-core.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index e1346cddd37f..1c1a7caf785e 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -2622,8 +2622,11 @@ static int ata_sg_setup_one(struct ata_queued_cmd *qc) dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt, sg->length, dir); - if (dma_mapping_error(dma_address)) + if (dma_mapping_error(dma_address)) { + /* restore sg */ + sg->length += qc->pad_len; return -1; + } sg_dma_address(sg) = dma_address; sg_dma_len(sg) = sg->length; @@ -2694,8 +2697,11 @@ static int ata_sg_setup(struct ata_queued_cmd *qc) dir = qc->dma_dir; n_elem = dma_map_sg(ap->host_set->dev, sg, qc->n_elem, dir); - if (n_elem < 1) + if (n_elem < 1) { + /* restore last sg */ + lsg->length += qc->pad_len; return -1; + } DPRINTK("%d sg elements mapped\n", n_elem); |