Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     Brian King <brking@linux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 3.18 15/63] scsi: ipr: Fix missed EH wakeup
Thread-Topic: [PATCH AUTOSEL for 3.18 15/63] scsi: ipr: Fix missed EH wakeup
Thread-Index: AQHTsz+ghzMtJBc53kGZCx0fsqeepQ==
Date:   Sat, 3 Mar 2018 22:33:17 +0000
Message-ID: <20180303223228.27323-15-alexander.levin@microsoft.com>
References: <20180303223228.27323-1-alexander.levin@microsoft.com>
In-Reply-To: <20180303223228.27323-1-alexander.levin@microsoft.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: microsoft.com does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 34455db2-e814-4377-f7b1-08d58157d7ff
X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Mar 2018 22:33:17.6222
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB0940
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: Brian King <brking@linux.vnet.ibm.com>

[ Upstream commit 66a0d59cdd12546ddf01d229de28b07ccf6d637f ]

Following a command abort or device reset, ipr's EH handlers wait for
the commands getting aborted to get sent back from the adapter prior to
returning from the EH handler. This fixes up some cases where the
completion handler was not getting called, which would have resulted in
the EH thread waiting until it timed out, greatly extending EH time.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Reviewed-by: Wendy Xiong <wenxiong@linux.vnet.ibm.com>
Tested-by: Wendy Xiong <wenxiong@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/scsi/ipr.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 105adb4cf6a8..54dfae5c8ee3 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -828,8 +828,10 @@ static void ipr_sata_eh_done(struct ipr_cmnd *ipr_cmd)
=20
 	qc->err_mask |=3D AC_ERR_OTHER;
 	sata_port->ioasa.status |=3D ATA_BUSY;
-	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 	ata_qc_complete(qc);
+	if (ipr_cmd->eh_comp)
+		complete(ipr_cmd->eh_comp);
+	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 }
=20
 /**
@@ -5830,8 +5832,10 @@ static void ipr_erp_done(struct ipr_cmnd *ipr_cmd)
 		res->in_erp =3D 0;
 	}
 	scsi_dma_unmap(ipr_cmd->scsi_cmd);
-	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 	scsi_cmd->scsi_done(scsi_cmd);
+	if (ipr_cmd->eh_comp)
+		complete(ipr_cmd->eh_comp);
+	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 }
=20
 /**
@@ -6214,8 +6218,10 @@ static void ipr_erp_start(struct ipr_ioa_cfg *ioa_cf=
g,
 	}
=20
 	scsi_dma_unmap(ipr_cmd->scsi_cmd);
-	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 	scsi_cmd->scsi_done(scsi_cmd);
+	if (ipr_cmd->eh_comp)
+		complete(ipr_cmd->eh_comp);
+	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 }
=20
 /**
@@ -6241,8 +6247,10 @@ static void ipr_scsi_done(struct ipr_cmnd *ipr_cmd)
 		scsi_dma_unmap(scsi_cmd);
=20
 		spin_lock_irqsave(ipr_cmd->hrrq->lock, lock_flags);
-		list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 		scsi_cmd->scsi_done(scsi_cmd);
+		if (ipr_cmd->eh_comp)
+			complete(ipr_cmd->eh_comp);
+		list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
 		spin_unlock_irqrestore(ipr_cmd->hrrq->lock, lock_flags);
 	} else {
 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
--=20
2.14.1