diff options
| author | Mark Lord <lkml@rtr.ca> | 2006-03-21 21:05:32 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-03-27 22:47:29 -0800 |
| commit | 65851bbf2ab375b4c00f4571dfb5c1003625c12f (patch) | |
| tree | 456160697d0a03710fe9c995107ba3cc00077f39 | |
| parent | 6079ca923de842e173b943b96c2fa3034826c68f (diff) | |
[PATCH] 2.6.xx: sata_mv: another critical fix
This patch addresses a number of weird behaviours observed
for the sata_mv driver, by fixing an "off by one" bug in processing
of the EDMA response queue.
Basically, sata_mv was looking in the wrong place for
command results, and this produced a lot of unpredictable behaviour.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/scsi/sata_mv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index 236d08bf05ad..b00af0884e1e 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -1102,6 +1102,7 @@ static u8 mv_get_crpb_status(struct ata_port *ap) void __iomem *port_mmio = mv_ap_base(ap); struct mv_port_priv *pp = ap->private_data; u32 out_ptr; + u8 ata_status; out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); @@ -1109,6 +1110,8 @@ static u8 mv_get_crpb_status(struct ata_port *ap) assert(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == pp->rsp_consumer); + ata_status = pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT; + /* increment our consumer index... */ pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer); @@ -1123,7 +1126,7 @@ static u8 mv_get_crpb_status(struct ata_port *ap) writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); /* Return ATA status register for completed CRPB */ - return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT); + return ata_status; } /** |