diff options
| author |   Liu Ying <victor.liu@nxp.com> | 2023-11-23 11:26:15 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2023-11-25 00:47:46 +0100 |
| commit | 39d5b6a64ace77d0c11c398d272218df5f939abb (patch) | |
| tree | ffd8d8942c1f9addd9990448b5a948e035b83945 /drivers/dma-buf | |
| parent | nouveau/gsp: allocate enough space for all channel ids. (diff) | |
| download | wireguard-linux-39d5b6a64ace77d0c11c398d272218df5f939abb.tar.xz wireguard-linux-39d5b6a64ace77d0c11c398d272218df5f939abb.zip | |
drm/bridge: panel: Check device dependency before managing device link
Some panel devices already depend on DRM device, like the panel in
arch/arm/boot/dts/st/ste-ux500-samsung-skomer.dts, because DRM device is
the ancestor of those panel devices. device_link_add() would fail by
returning a NULL pointer for those panel devices because of the existing
dependency. So, check the dependency by calling device_is_dependent()
before adding or deleting device link between panel device and DRM device
so that the link is managed only for independent panel devices.
Fixes: 887878014534 ("drm/bridge: panel: Fix device link for DRM_BRIDGE_ATTACH_NO_CONNECTOR")
Fixes: 199cf07ebd2b ("drm/bridge: panel: Add a device link between drm device and panel device")
Reported-by: Linus Walleij <linus.walleij@linaro.org>
Closes: https://lore.kernel.org/lkml/CACRpkdaGzXD6HbiX7mVUNJAJtMEPG00Pp6+nJ1P0JrfJ-ArMvQ@mail.gmail.com/T/
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231123032615.3760488-1-victor.liu@nxp.com
Diffstat (limited to 'drivers/dma-buf')
0 files changed, 0 insertions, 0 deletions