[PATCH v2] drm/ast: astdp: fix loop timeout check

[Dan Carpenter]

On Mon, Aug 12, 2024 at 09:42:53AM +0300, Dan Carpenter wrote:
> This code has an issue because it loops until "i" is set to UINT_MAX but
> the test for failure assumes that "i" is set to zero.  The result is that
> it will only print an error message if we succeed on the very last try.
> Reformat the loop to count forwards instead of backwards.
> 
> Fixes: 2281475168d2 ("drm/ast: astdp: Perform link training during atomic_enable")
> Signed-off-by: Dan Carpenter <dan.carpenter at linaro.org>
> ---
> v2: In version one, I introduced a bug where it would msleep(100) after failure
>     and that is a pointless thing to do.  Also change the loop to a for loop.

I mean this version also sleeps on the last failed iteration but at least there
isn't always true if statement to try prevent optimize away the last sleep.
I'm okay with a sleep on the slow path but not with pointless if statements. ;)

regards,
dan carpenter