linux-kernel - [PATCH 05/11] scsi: scsi_debug: Drop scsi_debug_target

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Message-Id: <20230307105555.3745277-6-john.g.garry@oracle.com>
Date:   Tue,  7 Mar 2023 10:55:49 +0000
From:   John Garry <john.g.garry@...cle.com>
To:     jejb@...ux.ibm.com, martin.petersen@...cle.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        dgilbert@...erlog.com, John Garry <john.g.garry@...cle.com>
Subject: [PATCH 05/11] scsi: scsi_debug: Drop scsi_debug_target_reset() NULL pointer checks

The checks for SCSI cmnd, SCSI device, and SCSI host are unnecessary, so
drop them. Likewise, drop the NULL check for sdbg_host.

The only caller is scsi_try_target_reset() -> eh_target_reset_handler(),
and there those pointers cannot be NULL.

Signed-off-by: John Garry <john.g.garry@...cle.com>
---
 drivers/scsi/scsi_debug.c | 31 +++++++++++--------------------
 1 file changed, 11 insertions(+), 20 deletions(-)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index b67d0c72118c..33c0df6a3275 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -5389,37 +5389,28 @@ static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
 
 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
 {
+	struct scsi_device *sdp = SCpnt->device;
 	struct sdebug_host_info *sdbg_host;
 	struct sdebug_dev_info *devip;
-	struct scsi_device *sdp;
-	struct Scsi_Host *hp;
 	int k = 0;
 
 	++num_target_resets;
-	if (!SCpnt)
-		goto lie;
-	sdp = SCpnt->device;
-	if (!sdp)
-		goto lie;
 	if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
 		sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
-	hp = sdp->host;
-	if (!hp)
-		goto lie;
-	sdbg_host = to_sdebug_host_from_shost(hp);
-	if (sdbg_host) {
-		list_for_each_entry(devip,
-				    &sdbg_host->dev_info_list,
-				    dev_list)
-			if (devip->target == sdp->id) {
-				set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
-				++k;
-			}
+
+	sdbg_host = to_sdebug_host_from_shost(sdp->host);
+
+	list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
+		if (devip->target == sdp->id) {
+			set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
+			++k;
+		}
 	}
+
 	if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
 		sdev_printk(KERN_INFO, sdp,
 			    "%s: %d device(s) found in target\n", __func__, k);
-lie:
+
 	return SUCCESS;
 }
 
-- 
2.35.3