[PATCH] drm/i915/display: fix missing null check on allocated dsb object

[Dan Carpenter]

On Tue, Jun 16, 2020 at 12:42:21PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> Currently there is no null check for a failed memory allocation
> on the dsb object and without this a null pointer dereference
> error can occur. Fix this by adding a null check.
> 
> Note: added a drm_err message in keeping with the error message style
> in the function.

Don't give in to peer pressure!  That's like being a lemming when Disney
film makers come to push you off the cliff to create the 1958 nature
film "White Wilderness".

regards,
dan carpenter