[Intel-gfx] [PATCH 2/8] drm/i915/dsi: don't pass arbitrary data to sideband

[Jani Nikula]

On Thu, 04 Feb 2016, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote:
> On Thu, Feb 04, 2016 at 12:50:50PM +0200, Jani Nikula wrote:
>> Since sequence block v2 the second byte contains flags other than just
>> pull up/down. Don't pass arbitrary data to the sideband interface.
>> 
>> The rest may or may not work for sequence block v2, but there should be
>> no harm done.
>> 
>> Cc: stable at vger.kernel.org
>> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
>
> Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> well, as far as it can be reviewed with the crappy specs.

Pushed patches 1-2 to dinq, thanks for the review.

BR,
Jani.

>
>> ---
>>  drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
>> index 4775aa5462e8..6f013efba45b 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
>> +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
>> @@ -207,7 +207,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>>  	gpio = *data++;
>>  
>>  	/* pull up/down */
>> -	action = *data++;
>> +	action = *data++ & 1;
>>  
>>  	if (gpio >= ARRAY_SIZE(gtable)) {
>>  		DRM_DEBUG_KMS("unknown gpio %u\n", gpio);
>> -- 
>> 2.1.4
>> 
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-- 
Jani Nikula, Intel Open Source Technology Center