From fae009847c9ea3d668bbee21ce1d76764eca5039 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 7 Aug 2005 14:53:40 +0900
Subject: [PATCH] [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>
---
drivers/scsi/sata_sx4.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c
index 140cea05de3f..efd7d7a61135 100644
--- a/drivers/scsi/sata_sx4.c
+++ b/drivers/scsi/sata_sx4.c
@@ -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;
--
2.20.1