[libata] Fix HDIO_DRIVE_* ioctl() Linux 3.9 regression

On Mon, Mar 25, 2013 at 06:26:50PM +0100, Ronald wrote:
> In reply to [1]: I have the same issue. Git bisect took 50+ rebuilds xD
>
> Smartd does not work anymore since 84a9a8cd9 ([libata] Set proper SK
> when CK_COND is set.).

> [1] http://www.spinics.net/lists/linux-ide/msg45268.html

It seems that the SAM_STAT_CHECK_CONDITION is not cleared
causing -EIO, because that patch modified sensebuf and
the check for clearing SAM_STAT_CHECK_CONDITION is no longer valid.

Fix that.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/libata-scsi.c

@@ -532,8 +532,8 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
 			struct scsi_sense_hdr sshdr;
 			scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
 					     &sshdr);
-			if (sshdr.sense_key == 0 &&
-			    sshdr.asc == 0 && sshdr.ascq == 0)
+			if (sshdr.sense_key == RECOVERED_ERROR &&
+			    sshdr.asc == 0 && sshdr.ascq == 0x1d)
 				cmd_result &= ~SAM_STAT_CHECK_CONDITION;
 		}
 
@@ -618,8 +618,8 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
 			struct scsi_sense_hdr sshdr;
 			scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
 						&sshdr);
-			if (sshdr.sense_key == 0 &&
-				sshdr.asc == 0 && sshdr.ascq == 0)
+			if (sshdr.sense_key == RECOVERED_ERROR &&
+			    sshdr.asc == 0 && sshdr.ascq == 0x1d)
 				cmd_result &= ~SAM_STAT_CHECK_CONDITION;
 		}