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Commit cb924419 authored by Mark Lord's avatar Mark Lord Committed by Jeff Garzik
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sata_mv ncq Ignore response status LSB on NCQ 



The lower 8 bits of response status are not valid for NCQ.

Signed-off-by: default avatarMark Lord <mlord@pobox.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 8c0aeb4a

drivers/ata/sata_mv.c

+4 −5
Original line number Diff line number Diff line
@@ -1590,13 +1590,12 @@ static void mv_intr_edma(struct ata_port *ap) 


		qc = ata_qc_from_tag(ap, tag);



		/* lower 8 bits of status are EDMA_ERR_IRQ_CAUSE_OFS

		 * bits (WARNING: might not necessarily be associated

		 * with this command), which -should- be clear

		 * if all is well

		/* For non-NCQ mode, the lower 8 bits of status

		 * are from EDMA_ERR_IRQ_CAUSE_OFS,

		 * which should be zero if all went well.

		 */

		status = le16_to_cpu(pp->crpb[out_index].flags);

		if (unlikely(status & 0xff)) {

		if ((status & 0xff) && !(pp->pp_flags & MV_PP_FLAG_NCQ_EN)) {

			mv_err_intr(ap, qc);

			return;

		}