linux-kernel - Re: [PATCH] media: exynos-gsc: fix build warning

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Date:	Tue, 25 Nov 2014 15:21:21 +0000
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	LMML <linux-media@...r.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>
Subject: Re: [PATCH] media: exynos-gsc: fix build warning

Hi,

On Tue, Nov 25, 2014 at 3:18 PM, Prabhakar Lad
<prabhakar.csengg@...il.com> wrote:
> Hi Mauro,
>
> On Tue, Nov 25, 2014 at 3:04 PM, Mauro Carvalho Chehab
> <mchehab@....samsung.com> wrote:
>> Em Tue, 18 Nov 2014 10:57:48 +0000
> [Snip]
>>
>> -static u32 get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index)
>> +static int get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index, u32 *ret_addr)
>>  {
>>         if (frm->addr.y == addr) {
>>                 *index = 0;
>> -               return frm->addr.y;
>> +               *ret_addr = frm->addr.y;
>>         } else if (frm->addr.cb == addr) {
>>                 *index = 1;
>> -               return frm->addr.cb;
>> +               *ret_addr = frm->addr.cb;
>>         } else if (frm->addr.cr == addr) {
>>                 *index = 2;
>> -               return frm->addr.cr;
>> +               *ret_addr = frm->addr.cr;
>>         } else {
>>                 pr_err("Plane address is wrong");
>>                 return -EINVAL;
>>         }
>> +       return 0;
> the control wont reach here! may be you can remove the complete else
> part outside ?
>
Ah my bad :(, I missread 'ret_addr' to return.

Thanks,
--Prabhakar Lad

> with that change,
>
> Reported-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
> Acked-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
>
> Thanks,
> --Prabhakar Lad
>
>>  }
>>
>>  void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
>> @@ -352,9 +353,11 @@ void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
>>                 u32 t_min, t_max;
>>
>>                 t_min = min3(frm->addr.y, frm->addr.cb, frm->addr.cr);
>> -               low_addr = get_plane_info(frm, t_min, &low_plane);
>> +               if (get_plane_info(frm, t_min, &low_plane, &low_addr))
>> +                       return;
>>                 t_max = max3(frm->addr.y, frm->addr.cb, frm->addr.cr);
>> -               high_addr = get_plane_info(frm, t_max, &high_plane);
>> +               if (get_plane_info(frm, t_max, &high_plane, &high_addr))
>> +                       return;
>>
>>                 mid_plane = 3 - (low_plane + high_plane);
>>                 if (mid_plane == 0)
--
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