linux-kernel - [PATCH V2] scsi: libsas: Directly kick-off EH when ATA device fell off

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Message-ID: <20221216100327.7386-1-yangxingui@huawei.com>
Date:   Fri, 16 Dec 2022 10:03:27 +0000
From:   Xingui Yang <yangxingui@...wei.com>
To:     <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <john.g.garry@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <yangxingui@...wei.com>,
        <prime.zeng@...ilicon.com>, <kangfenglong@...wei.com>
Subject: [PATCH V2] scsi: libsas: Directly kick-off EH when ATA device fell off

If the ATA device fell off, call sas_ata_device_link_abort() directly and
mark all outstanding QCs as failed and kick-off EH Immediately. This avoids
having to wait for block layer timeouts.

Signed-off-by: Xingui Yang <yangxingui@...wei.com>
---
Changes to v1:
- Use dev_is_sata() to check ATA device type 
 drivers/scsi/libsas/sas_discover.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index d5bc1314c341..a12b65eb4a2a 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -362,6 +362,9 @@ static void sas_destruct_ports(struct asd_sas_port *port)
 
 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev)
 {
+	if (test_bit(SAS_DEV_GONE, &dev->state) && dev_is_sata(dev))
+		sas_ata_device_link_abort(dev, false);
+
 	if (!test_bit(SAS_DEV_DESTROY, &dev->state) &&
 	    !list_empty(&dev->disco_list_node)) {
 		/* this rphy never saw sas_rphy_add */
-- 
2.17.1