From: Tejun Heo <htejun@gmail.com>
Date: Mon, 23 Jan 2006 07:31:53 +0000 (+0900)
Subject: [PATCH] ahci: stop engine during hard reset
X-Git-Tag: archive/raspbian/4.9.13-1+rpi1~10^2~45994^2~114
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/www.github.com/%22bookmarks:///%22http:/www.example.com/cgi/%22https:/www.github.com/%22bookmarks:/?a=commitdiff_plain;h=e0bfd149973d22a4330dd6665b54d1dcca07174a;p=linux-4.9.git

[PATCH] ahci: stop engine during hard reset

AHCI spec mandates engine to be stopped during hard resets.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
---

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 5a6b23009897..2abc0aca5a8d 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -504,7 +504,9 @@ static void ahci_phy_reset(struct ata_port *ap)
 	struct ata_device *dev = &ap->device[0];
 	u32 new_tmp, tmp;
 
+	ahci_stop_engine(ap);
 	__sata_phy_reset(ap);
+	ahci_start_engine(ap);
 
 	if (ap->flags & ATA_FLAG_PORT_DISABLED)
 		return;