scsi: scsi_debug: Drop scsi_debug_bus_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_bus_reset() -> eh_bus_reset_handler(), and
there those pointers cannot be NULL.

Signed-off-by: John Garry <john.g.garry@oracle.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Link: https://lore.kernel.org/r/20230313093114.1498305-7-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index f92a0da..c4ece0b 100644 (file)
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -5412,34 +5412,24 @@ static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
 
 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
 {
-       struct sdebug_host_info *sdbg_host;
+       struct scsi_device *sdp = SCpnt->device;
+       struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
        struct sdebug_dev_info *devip;
-       struct scsi_device *sdp;
-       struct Scsi_Host *hp;
        int k = 0;
 
        ++num_bus_resets;
-       if (!(SCpnt && SCpnt->device))
-               goto lie;
-       sdp = SCpnt->device;
+
        if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
                sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
-       hp = sdp->host;
-       if (hp) {
-               sdbg_host = shost_to_sdebug_host(hp);
-               if (sdbg_host) {
-                       list_for_each_entry(devip,
-                                           &sdbg_host->dev_info_list,
-                                           dev_list) {
-                               set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
-                               ++k;
-                       }
-               }
+
+       list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
+               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 host\n", __func__, k);
-lie:
        return SUCCESS;
 }