[U-Boot] [PATCH] common/lcd: add protection from null bmp pointer

[Nikita Kiryanov <nikita@compulab.co.il>]

On 08/18/2012 02:09 PM, Jeroen Hofstee wrote:
> Hi,
>> On 08/16/2012 12:43 PM, Nikita Kiryanov wrote:
>>> If the bmp pointer is null (for example because the environment
>>> variable "splashimage" was not defined) then U-Boot will get stuck
>>> when trying to load the image.
>> Which branch is this? At [1] there is a check for this..
>>
>> 1600         s = getenv("splashimage");
>> 1601         if (s != NULL) {
>> ...
>>
>> Regards,
>> Jeroen
>>
>> [1] .... drivers/video/cfb_console.c.....
> Just ignore above, since there are apparently more BMP drawing routines,
> and I mentioned the wrong one. The same check is in lcd.c though:
>
> 822: if (do_splash && (s = getenv("splashimage")) != NULL) {
>
You are right; the null splashimage scenario was apparently a bad choice of
example. However, lcd_display_bitmap is not a static function, and it 
appears
in lcd.h. This means that someone might use it outside of common/lcd.c 
context,
and for that reason it should be made more fault tolerant.

I'll resubmit the patch without the splashimage example in the commit 
message.
> Regards,
> Jeroen
>