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drm/imx: ignore plane updates on disabled crtcs

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[ Upstream commit 4fb873c9648e383206e0a91cef9b03aa54066aca ]

This patch fixes backtraces like the following when sending SIGKILL to a
process with a currently pending plane update:

    [drm:ipu_plane_atomic_check] CRTC should be enabled
    [drm:drm_framebuffer_remove] *ERROR* failed to commit
    ------------[ cut here ]------------
    WARNING: CPU: 3 PID: 63 at drivers/gpu/drm/drm_framebuffer.c:926 drm_framebuffer_remove+0x47c/0x498
    atomic remove_fb failed with -22

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Philipp Zabel 2018-11-05 16:36:07 +01:00 • committed by Greg Kroah-Hartman
parent 2e0e1f9a1e
commit a308622feb
1 changed files with 2 additions and 2 deletions

4
drivers/gpu/drm/imx/ipuv3-plane.c
View file

@ -375,9 +375,9 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
if (ret)
return ret;
/* CRTC should be enabled */
/* nothing to check when disabling or disabled */
if (!crtc_state->enable)
return -EINVAL;
return 0;
switch (plane->type) {
case DRM_PLANE_TYPE_PRIMARY: