libata: fix last_ctl caching in ata_tf_read()
last_ctl was not cached properly. (Pointed out
by Tejun Heo.)
Signed-off-by: Chuck Ebbert <cebbert@xxxxxxxxxx>
---
(Apply after Petr's patch to fix SMART bugs.)
drivers/ata/libata-sff.c | 4 ++++
1 file changed, 4 insertions(+)
--- 2.6.22-d390.orig/drivers/ata/libata-sff.c
+++ 2.6.22-d390/drivers/ata/libata-sff.c
@@ -196,7 +196,9 @@ void ata_tf_read(struct ata_port *ap, st
{
struct ata_ioports *ioaddr = &ap->ioaddr;
+ ap->last_ctl = tf->ctl;
iowrite8(tf->ctl, ioaddr->ctl_addr);
+
tf->command = ata_check_status(ap);
tf->feature = ioread8(ioaddr->error_addr);
tf->nsect = ioread8(ioaddr->nsect_addr);
@@ -206,7 +208,9 @@ void ata_tf_read(struct ata_port *ap, st
tf->device = ioread8(ioaddr->device_addr);
if (tf->flags & ATA_TFLAG_LBA48) {
+ ap->last_ctl = tf->ctl | ATA_HOB;
iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
+
tf->hob_feature = ioread8(ioaddr->error_addr);
tf->hob_nsect = ioread8(ioaddr->nsect_addr);
tf->hob_lbal = ioread8(ioaddr->lbal_addr);
-
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