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(parent: f5666d4) | patch
drm/fb-helper: Fix clip rectangle height
authorThomas Zimmermann <tzimmermann@suse.de>
Wed, 9 Feb 2022 16:16:13 +0000 (17:16 +0100)
committerThomas Zimmermann <tzimmermann@suse.de>
Thu, 10 Feb 2022 13:48:50 +0000 (14:48 +0100)
commita3c286dcef7f8bc576a20f5d1e80624f6b4b93ee
tree00a2164d7302a82850a95869f3a7b08e0b395912tree | snapshot
parentf5666d482305900b9622a2c9dd73a864a3b0d281commit | diff
drm/fb-helper: Fix clip rectangle height

Computing the clip rectangle is prone to off-by-one errors when writes
happen near the end of a memory page. Point the end of the memory area
to the first trailing byte, so that (end - start) returns the area's
length.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220209161617.3553-2-tzimmermann@suse.de
drivers/gpu/drm/drm_fb_helper.c diff | blob | history
Domain: System / Kernel;