Commit fae00984 authored Aug 07, 2005 by Tejun Heo Committed by Jeff Garzik Aug 10, 2005

[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>

parent 86b37860

drivers/scsi/sata_sx4.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -468,7 +468,7 @@ static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
		for (i = 0; i < last; i++) {
		buf[idx++] = cpu_to_le32(sg_dma_address(&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);
		sgt_len = idx * 4;