linux-kernel - [PATCH ] scsi: ufs: core: bsg: Fix sometimes-uninitialized warnings

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Date:   Sat, 31 Dec 2022 16:03:43 +0100
From:   Bean Huo <beanhuo@...pp.de>
To:     alim.akhtar@...sung.com, avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, beanhuo@...ron.com, bvanassche@....org,
        quic_cang@...cinc.com, quic_xiaosenh@...cinc.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>
Subject: [PATCH ] scsi: ufs: core: bsg: Fix sometimes-uninitialized warnings

From: Bean Huo <beanhuo@...ron.com>

Compilation complains that two possible variables are used without
initialization:

drivers/ufs/core/ufs_bsg.c:112:6: warning: variable 'sg_cnt' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
drivers/ufs/core/ufs_bsg.c:112:6: warning: variable 'sg_list' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]

Fix both warnings by adding initialization with sg_cnt = 0, sg_list = NULL.

Fixes: 6ff265fc5ef6 ("scsi: ufs: core: bsg: Add advanced RPMB support in ufs_bsg")
Signed-off-by: Bean Huo <beanhuo@...ron.com>
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Xiaosen He <quic_xiaosenh@...cinc.com>
---
Hi Martin,

This patch is to fix two compilation warnings introduced by my commit:
6ff265fc5ef6 ("scsi: ufs: core: bsg: Add advanced RPMB support in ufs_bsg").

Apologies for this.

---
 drivers/ufs/core/ufs_bsg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ufs/core/ufs_bsg.c b/drivers/ufs/core/ufs_bsg.c
index 0044029bcf7b..0d38e7fa34cc 100644
--- a/drivers/ufs/core/ufs_bsg.c
+++ b/drivers/ufs/core/ufs_bsg.c
@@ -70,9 +70,9 @@ static int ufs_bsg_exec_advanced_rpmb_req(struct ufs_hba *hba, struct bsg_job *j
 	struct ufs_rpmb_reply *rpmb_reply = job->reply;
 	struct bsg_buffer *payload = NULL;
 	enum dma_data_direction dir;
-	struct scatterlist *sg_list;
+	struct scatterlist *sg_list = NULL;
 	int rpmb_req_type;
-	int sg_cnt;
+	int sg_cnt = 0;
 	int ret;
 	int data_len;
 
-- 
2.25.1