[libata] sata_mv: errata check buglet fix
Fix a buglet; the errata check below this code is assuming the value in
the sstatus variable is what was pulled out of the SCR_STATUS register.
However, the status checks in the timeout loop clobber everything
but the first 4 bits of sstatus, so the errata checks are invalid.
This patch changes it to not clobber SStatus.
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index 1053c7c..fa38a41 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -1961,8 +1961,7 @@
timeout = jiffies + msecs_to_jiffies(200);
do {
sata_scr_read(ap, SCR_STATUS, &sstatus);
- sstatus &= 0x3;
- if ((sstatus == 3) || (sstatus == 0))
+ if (((sstatus & 0x3) == 3) || ((sstatus & 0x3) == 0))
break;
__msleep(1, can_sleep);