linux-kernel - [PATCH] usb: gadget: legacy: fix redundant initialization warnings from cppcheck

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Message-Id: <20200403131652.8183-1-masahiroy@kernel.org>
Date:   Fri,  3 Apr 2020 22:16:51 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Felipe Balbi <felipe.balbi@...ux.intel.com>,
        linux-usb@...r.kernel.org
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Corentin Labbe <clabbe@...libre.com>,
        David Howells <dhowells@...hat.com>,
        Felipe Balbi <balbi@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] usb: gadget: legacy: fix redundant initialization warnings from cppcheck

Fix the following cppcheck warnings:

drivers/usb/gadget/legacy/inode.c:1364:8: style: Redundant initialization for 'value'. The initialized value is overwritten$
 value = -EOPNOTSUPP;
       ^
drivers/usb/gadget/legacy/inode.c:1331:15: note: value is initialized
 int    value = -EOPNOTSUPP;
              ^
drivers/usb/gadget/legacy/inode.c:1364:8: note: value is overwritten
 value = -EOPNOTSUPP;
       ^
drivers/usb/gadget/legacy/inode.c:1817:8: style: Redundant initialization for 'value'. The initialized value is overwritten$
 value = -EINVAL;
       ^
drivers/usb/gadget/legacy/inode.c:1787:18: note: value is initialized
 ssize_t   value = len, length = len;
                 ^
drivers/usb/gadget/legacy/inode.c:1817:8: note: value is overwritten
 value = -EINVAL;
       ^

Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

I do not think this is my fault because the addressed commit did not
touch this file, but the kbuild test robot sent me this report somehow:

  https://lkml.org/lkml/2020/4/3/395

Anyway, the warnings are real, so I removed the redundant assignments.
I re-ran cppcheck and confirmed the warnings have been fixed.


 drivers/usb/gadget/legacy/inode.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index aa0de9e35afa..3afddd3bea6e 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -1361,7 +1361,6 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 
 	req->buf = dev->rbuf;
 	req->context = NULL;
-	value = -EOPNOTSUPP;
 	switch (ctrl->bRequest) {
 
 	case USB_REQ_GET_DESCRIPTOR:
@@ -1784,7 +1783,7 @@ static ssize_t
 dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 {
 	struct dev_data		*dev = fd->private_data;
-	ssize_t			value = len, length = len;
+	ssize_t			value, length = len;
 	unsigned		total;
 	u32			tag;
 	char			*kbuf;
-- 
2.17.1