linux-kernel - [PATCH] scsi: ipr: remove several unused variables

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Date:   Thu, 20 Apr 2023 08:50:35 -0400
From:   Tom Rix <trix@...hat.com>
To:     brking@...ibm.com, jejb@...ux.ibm.com, martin.petersen@...cle.com,
        john.g.garry@...cle.com, dlemoal@...nel.org
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tom Rix <trix@...hat.com>
Subject: [PATCH] scsi: ipr: remove several unused variables

gcc with W=1 reports
drivers/scsi/ipr.c: In function ‘ipr_init_res_entry’:
drivers/scsi/ipr.c:1104:22: error: variable ‘proto’
  set but not used [-Werror=unused-but-set-variable]
 1104 |         unsigned int proto;
      |                      ^~~~~
drivers/scsi/ipr.c: In function ‘ipr_update_res_entry’:
drivers/scsi/ipr.c:1261:22: error: variable ‘proto’
  set but not used [-Werror=unused-but-set-variable]
 1261 |         unsigned int proto;
      |                      ^~~~~
drivers/scsi/ipr.c: In function ‘ipr_change_queue_depth’:
drivers/scsi/ipr.c:4417:36: error: variable ‘res’
  set but not used [-Werror=unused-but-set-variable]
 4417 |         struct ipr_resource_entry *res;
      |                                    ^~~

These variables are not used, so remove them.
The lock around res is not needed so remove that.
Which makes ioa_cfg and lock_flags unneeded so remove them.

Fixes: 65a15d6560df ("scsi: ipr: Remove SATA support")
Signed-off-by: Tom Rix <trix@...hat.com>
---
 drivers/scsi/ipr.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index d81189ba8773..4e13797b2a4a 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -1101,7 +1101,6 @@ static void ipr_init_res_entry(struct ipr_resource_entry *res,
 			       struct ipr_config_table_entry_wrapper *cfgtew)
 {
 	int found = 0;
-	unsigned int proto;
 	struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
 	struct ipr_resource_entry *gscsi_res = NULL;
 
@@ -1114,7 +1113,6 @@ static void ipr_init_res_entry(struct ipr_resource_entry *res,
 	res->sdev = NULL;
 
 	if (ioa_cfg->sis64) {
-		proto = cfgtew->u.cfgte64->proto;
 		res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
 		res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
 		res->qmodel = IPR_QUEUEING_MODEL64(res);
@@ -1160,7 +1158,6 @@ static void ipr_init_res_entry(struct ipr_resource_entry *res,
 			set_bit(res->target, ioa_cfg->target_ids);
 		}
 	} else {
-		proto = cfgtew->u.cfgte->proto;
 		res->qmodel = IPR_QUEUEING_MODEL(res);
 		res->flags = cfgtew->u.cfgte->flags;
 		if (res->flags & IPR_IS_IOA_RESOURCE)
@@ -1258,7 +1255,6 @@ static void ipr_update_res_entry(struct ipr_resource_entry *res,
 				 struct ipr_config_table_entry_wrapper *cfgtew)
 {
 	char buffer[IPR_MAX_RES_PATH_LENGTH];
-	unsigned int proto;
 	int new_path = 0;
 
 	if (res->ioa_cfg->sis64) {
@@ -1270,7 +1266,6 @@ static void ipr_update_res_entry(struct ipr_resource_entry *res,
 			sizeof(struct ipr_std_inq_data));
 
 		res->qmodel = IPR_QUEUEING_MODEL64(res);
-		proto = cfgtew->u.cfgte64->proto;
 		res->res_handle = cfgtew->u.cfgte64->res_handle;
 		res->dev_id = cfgtew->u.cfgte64->dev_id;
 
@@ -1299,7 +1294,6 @@ static void ipr_update_res_entry(struct ipr_resource_entry *res,
 			sizeof(struct ipr_std_inq_data));
 
 		res->qmodel = IPR_QUEUEING_MODEL(res);
-		proto = cfgtew->u.cfgte->proto;
 		res->res_handle = cfgtew->u.cfgte->res_handle;
 	}
 }
@@ -4413,14 +4407,6 @@ static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
  **/
 static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth)
 {
-	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
-	struct ipr_resource_entry *res;
-	unsigned long lock_flags = 0;
-
-	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
-	res = (struct ipr_resource_entry *)sdev->hostdata;
-	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
-
 	scsi_change_queue_depth(sdev, qdepth);
 	return sdev->queue_depth;
 }
-- 
2.27.0