linux-kernel - Re: [PATCH] drm/amd/display: fix type of variable

Open Source and information security mailing list archives

Date:   Fri, 15 Jun 2018 12:39:08 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Signed-off-by@...edesktop.org:Roman Li <Roman.Li@....com>, Alex Deucher <alexander.deucher@....com>, Christian König <christian.koenig@....com>, David (ChunMing) Zhou <David1.Zhou@....com>, David Airlie <airlied@...ux.ie>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amd/display: fix type of variable

On Fri, Jun 15, 2018 at 9:32 AM, Gustavo A. R. Silva
<gustavo@...eddedor.com> wrote:
> Currently, the maximum value that *counter* can reach is 255, and
> code at line 150: while (counter < 1000) { implies a bigger value
> could be expected.
>
> Fix this by changing the type of variable *counter* from uint8_t
> to uint16_t.
>
> Addresses-Coverity-ID: 1470030 ("Operands don't affect result")
> Fixes: 2b6199a1d1b7 ("drm/amd/display: replace msleep with udelay in fbc path")
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Applied.  thanks!

Alex

> ---
>  drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
> index e2994d3..111c492 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
> @@ -143,7 +143,7 @@ static void wait_for_fbc_state_changed(
>         struct dce110_compressor *cp110,
>         bool enabled)
>  {
> -       uint8_t counter = 0;
> +       uint16_t counter = 0;
>         uint32_t addr = mmFBC_STATUS;
>         uint32_t value;
>
> --
> 2.7.4
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

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