linux-kernel - Re: [PATCH] hid: intel-ish-hid: avoid bogus uninitialized-variable warning

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Date:   Tue, 5 May 2020 09:55:01 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
cc:     Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Nick Crews <ncrews@...omium.org>,
        Rushikesh S Kadam <rushikesh.s.kadam@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hid: intel-ish-hid: avoid bogus uninitialized-variable
 warning

On Tue, 28 Apr 2020, Arnd Bergmann wrote:

> Older compilers like gcc-4.8 don't see that the variable is
> initialized when it is used:
> 
> In file included from include/linux/compiler_types.h:68:0,
>                  from <command-line>:0:
> drivers/hid/intel-ish-hid/ishtp-fw-loader.c: In function 'load_fw_from_host':
> include/linux/compiler-gcc.h:75:45: warning: 'fw_info.ldr_capability.max_dma_buf_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
>  #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
>                                              ^
> drivers/hid/intel-ish-hid/ishtp-fw-loader.c:770:22: note: 'fw_info.ldr_capability.max_dma_buf_size' was declared here
>   struct shim_fw_info fw_info;
>                       ^
> 
> Make sure to initialize it before returning an error from ish_query_loader_prop().
> 
> Fixes: 91b228107da3 ("HID: intel-ish-hid: ISH firmware loader client driver")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs