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authorTejun Heo <htejun@gmail.com>2005-11-05 14:29:01 -0500
committerJeff Garzik <jgarzik@pobox.com>2005-11-05 14:29:01 -0500
commit537a95d9351f41cc3c24ddb2a646aedd6debb21b (patch)
treee3bd5b05c2d396db3eb59997d3cc1b9e54df0ba6
parentfecb4a0c87c2bcaee1f3cf800126eef752a07ed3 (diff)
[libata] restore sg on DMA mapping failure
-rw-r--r--drivers/scsi/libata-core.c10
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);