diff options
author | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-05-09 15:00:39 +0200 |
---|---|---|
committer | Thierry Reding <treding@nvidia.com> | 2018-07-10 17:59:05 +0200 |
commit | 5fa8e4a22182df8ea39adeba4bd518506e26a96d (patch) | |
tree | 4b9a3df577632f7c2165ea86d4d98f2cb5018266 /drivers/gpu/drm/rcar-du | |
parent | 0ca0c827efdf248dfb4bbd4b9066acb6337e07ac (diff) |
drm/panel: Make of_drm_find_panel() return an ERR_PTR() instead of NULL
Right now, the DRM panel logic returns NULL when a panel pointing to
the passed OF node is not present in the list of registered panels.
Most drivers interpret this NULL value as -EPROBE_DEFER, but we are
about to modify the semantic of of_drm_find_panel() and let the
framework return -ENODEV when the device node we're pointing to has
a status property that is not equal to "okay" or "ok".
Let's first patch the of_drm_find_panel() implementation to return
ERR_PTR(-EPROBE_DEFER) instead of NULL and patch all callers to replace
the '!panel' check by an 'IS_ERR(panel)' one.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180509130042.9435-2-boris.brezillon@bootlin.com
Diffstat (limited to 'drivers/gpu/drm/rcar-du')
-rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_lvds.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c index 155ad840f3c5..5d8e391e75f4 100644 --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c @@ -434,8 +434,8 @@ static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) ret = -EPROBE_DEFER; } else { lvds->panel = of_drm_find_panel(remote); - if (!lvds->panel) - ret = -EPROBE_DEFER; + if (IS_ERR(lvds->panel)) + ret = PTR_ERR(lvds->panel); } done: |