[PATCH] 2.6.17-rc5: the latest consensus libata resume fix

[Mark Lord <liml@rtr.ca>]

Okay, just to sum things up.

The patch below is the current "release candidate" for
improving the libata/ata_piix resume functionality in 2.6.17-rc*.

It forces libata to wait for up to 2 seconds for BUSY|DRQ to clear
on resume before continuing.  This is only for 2.6.17 at present.

We are waiting on Jens to test and report back for this specific version.

Signed-off-by:  Mark Lord <liml@rtr.ca>
---
--- linux-2.6.17-rc5/drivers/scsi/libata-core.c
+++ linux/drivers/scsi/libata-core.c
@@ -4296,6 +4296,7 @@ static int ata_start_drive(struct ata_po
  */
 int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
 {
 	if (ap->flags & ATA_FLAG_SUSPENDED) {
+		ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
 		ap->flags &= ~ATA_FLAG_SUSPENDED;
 		ata_set_mode(ap);