Re: [PATCH 7/7] scsi_error: streamline scsi_eh_bus_device_reset()

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On 2023/10/2 23:59, Hannes Reinecke wrote:
Streamline to use a similar code flow as the other reset functions.

Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
  drivers/scsi/scsi_error.c | 26 +++++++++++---------------
  1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 21d84940c9cb..81b38f5da3b6 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1581,6 +1581,7 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
  {
  	struct scsi_cmnd *scmd, *bdr_scmd, *next;
  	struct scsi_device *sdev;
+	LIST_HEAD(check_list);
  	enum scsi_disposition rtn;
shost_for_each_device(sdev, shost) {
@@ -1606,27 +1607,22 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
  			sdev_printk(KERN_INFO, sdev,
  				     "%s: Sending BDR\n", current->comm));
  		rtn = scsi_try_bus_device_reset(sdev);
-		if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
-			if (!scsi_device_online(sdev) ||
-			    rtn == FAST_IO_FAIL ||
-			    !scsi_eh_tur(bdr_scmd)) {
-				list_for_each_entry_safe(scmd, next,
-							 work_q, eh_entry) {
-					if (scmd->device == sdev &&
-					    scsi_eh_action(scmd, rtn) != FAILED)
-						__scsi_eh_finish_cmd(scmd,
-								     done_q,
-								     DID_RESET);
-				}
-			}
-		} else {
+		if (rtn != SUCCESS && rtn != FAST_IO_FAIL)
  			SCSI_LOG_ERROR_RECOVERY(3,
  				sdev_printk(KERN_INFO, sdev,
  					    "%s: BDR failed\n", current->comm));
+		list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
+			if (scmd->device != sdev)
+				continue;
+			if (rtn == SUCCESS)
+				list_move_tail(&scmd->eh_entry, &check_list);
+			else if (rtn == FAST_IO_FAIL)
+				__scsi_eh_finish_cmd(scmd, done_q,
+						     DID_TRANSPORT_DISRUPTED);
  		}
  	}
- return list_empty(work_q);
+	return scsi_eh_test_devices(&check_list, work_q, done_q, 0);
  }
/**

I think the bdr_scmd related lines should also be removed like following:

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 81b38f5da3b6..e3b0ac270dd9 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1579,7 +1579,7 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
                                    struct list_head *work_q,
                                    struct list_head *done_q)
 {
-       struct scsi_cmnd *scmd, *bdr_scmd, *next;
+       struct scsi_cmnd *scmd, *next;
        struct scsi_device *sdev;
        LIST_HEAD(check_list);
        enum scsi_disposition rtn;
@@ -1593,15 +1593,6 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
                        scsi_device_put(sdev);
                        break;
                }
-               bdr_scmd = NULL;
-               list_for_each_entry(scmd, work_q, eh_entry)
-                       if (scmd->device == sdev) {
-                               bdr_scmd = scmd;
-                               break;
-                       }
-
-               if (!bdr_scmd)
-                       continue;
SCSI_LOG_ERROR_RECOVERY(3,
                        sdev_printk(KERN_INFO, sdev,







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