[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>
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@ -468,7 +468,7 @@ static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
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for (i = 0; i < last; i++) {
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buf[idx++] = cpu_to_le32(sg_dma_address(&sg[i]));
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buf[idx++] = cpu_to_le32(sg_dma_len(&sg[i]));
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total_len += sg[i].length;
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total_len += sg_dma_len(&sg[i]);
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}
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buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
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sgt_len = idx * 4;
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