linux-kernel - Re: drivers/hid/hid-ft260.c:794:44: warning: format specifies type 'short' but the argument has type 'int'

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Message-ID: <20210506115546.GA1745@michael-VirtualBox>
Date:   Thu, 6 May 2021 14:55:46 +0300
From:   Michael Zaidman <michael.zaidman@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Jiri Kosina <jkosina@...e.cz>,
        Jiri Kosina <jikos@...nel.org>,
        Michael Zaidman <michael.zaidman@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: drivers/hid/hid-ft260.c:794:44: warning: format specifies type
 'short' but the argument has type 'int'

On Thu, May 06, 2021 at 06:47:46AM +0800, kernel test robot wrote:
> 
>    drivers/hid/hid-ft260.c:515:59: warning: variable 'len' is uninitialized when used here [-Wuninitialized]
>                    hid_err(hdev, "%s: unsupported wr len: %d\n", __func__, len);
>                                                                            ^~~
>    include/linux/hid.h:1190:30: note: expanded from macro 'hid_err'
>            dev_err(&(hid)->dev, fmt, ##__VA_ARGS__)
>                                        ^~~~~~~~~~~
>    include/linux/dev_printk.h:112:32: note: expanded from macro 'dev_err'
>            _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
>                                          ^~~~~~~~~~~
>    drivers/hid/hid-ft260.c:507:9: note: initialize the variable 'len' to silence this warning
>            int len, ret;
>                   ^
>                    = 0

This warning has already been found and fixed by Dan Carpenter in
the "HID: ft260: fix an error message in ft260_i2c_write_read()" commit
on March 18, 2021.