linux-kernel - [PATCH] misc: rtsx_usb: set return value in rsp

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Message-Id: <20220701164929.15296-1-skhan@linuxfoundation.org>
Date:   Fri,  1 Jul 2022 10:49:29 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     --to=arnd@...db.de, gregkh@...uxfoundation.org
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: [PATCH] misc: rtsx_usb: set return value in rsp_buf alloc err path

Set return value in rsp_buf alloc error path before going to
error handling.

drivers/misc/cardreader/rtsx_usb.c:639:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
           if (!ucr->rsp_buf)
               ^~~~~~~~~~~~~
   drivers/misc/cardreader/rtsx_usb.c:678:9: note: uninitialized use occurs here
           return ret;
                  ^~~
   drivers/misc/cardreader/rtsx_usb.c:639:2: note: remove the 'if' if its condition is always false
           if (!ucr->rsp_buf)
           ^~~~~~~~~~~~~~~~~~
   drivers/misc/cardreader/rtsx_usb.c:622:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0

Reported-by: kernel test robot <lkp@...el.com>
Fixes: 3776c7855985 ("misc: rtsx_usb: use separate command and response buffers")
Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 drivers/misc/cardreader/rtsx_usb.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/cardreader/rtsx_usb.c b/drivers/misc/cardreader/rtsx_usb.c
index 4e2108052509..f150d8769f19 100644
--- a/drivers/misc/cardreader/rtsx_usb.c
+++ b/drivers/misc/cardreader/rtsx_usb.c
@@ -636,8 +636,10 @@ static int rtsx_usb_probe(struct usb_interface *intf,
 		return -ENOMEM;
 
 	ucr->rsp_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL);
-	if (!ucr->rsp_buf)
+	if (!ucr->rsp_buf) {
+		ret = -ENOMEM;
 		goto out_free_cmd_buf;
+	}
 
 	usb_set_intfdata(intf, ucr);
 
-- 
2.34.1