[PATCH 01/13] drm/gma500: Sanity-check pipe index

[Patrik Jakobsson]

On Wed, Aug 12, 2015 at 5:00 PM, Thierry Reding
<thierry.reding at gmail.com> wrote:
> From: Thierry Reding <treding at nvidia.com>
>
> If the DSI output isn't connected, then mdfld_dsi_encoder_get_pipe()
> will return -1. The mdfld_dsi_dp_mode_set() function doesn't properly
> check for this condition and causes the following compiler warnings:
>
>           CC      drivers/gpu/drm/gma500/mdfld_dsi_dpi.o
>         drivers/gpu/drm/gma500/mdfld_dsi_dpi.c: In function ‘mdfld_dsi_dpi_mode_set’:
>         drivers/gpu/drm/gma500/mdfld_dsi_dpi.c:828:35: warning: array subscript is below array bounds [-Warray-bounds]
>           u32 pipeconf = dev_priv->pipeconf[pipe];
>                                            ^
>         drivers/gpu/drm/gma500/mdfld_dsi_dpi.c:829:33: warning: array subscript is below array bounds [-Warray-bounds]
>           u32 dspcntr = dev_priv->dspcntr[pipe];
>                                          ^
>
> Fix this by checking for a valid pipe before indexing the pipeconf and
> dspcntr arrays.
>
> Cc: Patrik Jakobsson <patrik.r.jakobsson at gmail.com>
> Signed-off-by: Thierry Reding <treding at nvidia.com>

Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson at gmail.com>