From: Shaun Tancheff <shaun@tancheff.com>
Date: Mon, 22 Aug 2016 04:23:21 +0000 (-0500)
Subject: libata: SCT Write Same handle ATA_DFLAG_PIO
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=7d36dd00ab8d57134cce86ad4febc2f5bbdf3e72;p=deliverable%2Flinux.git

libata: SCT Write Same handle ATA_DFLAG_PIO

Use non DMA write log when ATA_DFLAG_PIO is set.

Signed-off-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Tejun Heo <tj@kernel.org>
---

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 35b1f9e475cc..2f5487f02de1 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3485,6 +3485,8 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
 		tf->device = ATA_CMD_STANDBYNOW1;
 		tf->protocol = ATA_PROT_DMA;
 		tf->command = ATA_CMD_WRITE_LOG_DMA_EXT;
+		if (unlikely(dev->flags & ATA_DFLAG_PIO))
+			tf->command = ATA_CMD_WRITE_LOG_EXT;
 	}
 
 	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |