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[PATCH] sata: fix sata_sx4 dma_prep to not use sg->length 

sata_sx4 directly references sg->length to calculate total_len in
pdc20621_dma_prep().  This is incorrect as dma_map_sg() could have
merged multiple sg's into one and, in such case, sg->length doesn't
reflect true size of the entry.  This patch makes it use
sg_dma_len(sg).

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Tejun Heo 2005-08-07 14:53:40 +09:00 committed by Jeff Garzik
parent 86b3786078
commit fae009847c
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/sata_sx4.c
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@ -468,7 +468,7 @@ static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
for (i = 0; i < last; i++) { for (i = 0; i < last; i++) {
buf[idx++] = cpu_to_le32(sg_dma_address(&sg[i])); buf[idx++] = cpu_to_le32(sg_dma_address(&sg[i]));
buf[idx++] = cpu_to_le32(sg_dma_len(&sg[i])); buf[idx++] = cpu_to_le32(sg_dma_len(&sg[i]));
total_len += sg[i].length; total_len += sg_dma_len(&sg[i]);
} }
buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT); buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
sgt_len = idx * 4; sgt_len = idx * 4;