linux-kernel - [RFC PATCH v2 02/19] scsi: scsi_error: Move complete variable eh

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Message-ID: <20230901094127.2010873-3-haowenchao2@huawei.com>
Date:   Fri, 1 Sep 2023 17:41:10 +0800
From:   Wenchao Hao <haowenchao2@...wei.com>
To:     "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        <linux-scsi@...r.kernel.org>
CC:     Hannes Reinecke <hare@...e.de>, <linux-kernel@...r.kernel.org>,
        <louhongxiang@...wei.com>, <lixiaokeng@...wei.com>,
        Wenchao Hao <haowenchao2@...wei.com>
Subject: [RFC PATCH v2 02/19] scsi: scsi_error: Move complete variable eh_action from shost to sdevice

eh_action is used to wait for error handle command's completion if scsi
command is send in error handle. Now the error handler might based on
scsi_device, so move it to scsi_device.

This is preparation for a genernal LUN/target based error handle
strategy.

Signed-off-by: Wenchao Hao <haowenchao2@...wei.com>
---
 drivers/scsi/scsi_error.c  | 6 +++---
 include/scsi/scsi_device.h | 2 ++
 include/scsi/scsi_host.h   | 2 --
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 1d1d97b94613..879fdd7c165b 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -914,7 +914,7 @@ void scsi_eh_done(struct scsi_cmnd *scmd)
 	SCSI_LOG_ERROR_RECOVERY(3, scmd_printk(KERN_INFO, scmd,
 			"%s result: %x\n", __func__, scmd->result));
 
-	eh_action = scmd->device->host->eh_action;
+	eh_action = scmd->device->eh_action;
 	if (eh_action)
 		complete(eh_action);
 }
@@ -1203,7 +1203,7 @@ static enum scsi_disposition scsi_send_eh_cmnd(struct scsi_cmnd *scmd,
 
 retry:
 	scsi_eh_prep_cmnd(scmd, &ses, cmnd, cmnd_size, sense_bytes);
-	shost->eh_action = &done;
+	sdev->eh_action = &done;
 
 	scsi_log_send(scmd);
 	scmd->submitter = SUBMITTED_BY_SCSI_ERROR_HANDLER;
@@ -1246,7 +1246,7 @@ static enum scsi_disposition scsi_send_eh_cmnd(struct scsi_cmnd *scmd,
 		rtn = SUCCESS;
 	}
 
-	shost->eh_action = NULL;
+	sdev->eh_action = NULL;
 
 	scsi_log_completion(scmd, rtn);
 
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 08ed9a03015d..df3f1b8d1390 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -324,6 +324,8 @@ struct scsi_device {
 	enum scsi_device_state sdev_state;
 	struct task_struct	*quiesced_by;
 	struct scsi_device_eh	*eh;
+	struct completion	*eh_action;	/* Wait for specific actions */
+						/* on the device. */
 	unsigned long		sdev_data[];
 } __attribute__((aligned(sizeof(unsigned long))));
 
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 70b7475dcf56..def0d99e9b36 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -554,8 +554,6 @@ struct Scsi_Host {
 	struct list_head	eh_abort_list;
 	struct list_head	eh_cmd_q;
 	struct task_struct    * ehandler;  /* Error recovery thread. */
-	struct completion     * eh_action; /* Wait for specific actions on the
-					      host. */
 	wait_queue_head_t       host_wait;
 	const struct scsi_host_template *hostt;
 	struct scsi_transport_template *transportt;
-- 
2.35.3