diff options
| author | Nícolas F. R. A. Prado <nfraprado@collabora.com> | 2022-06-13 19:37:05 +0300 |
|---|---|---|
| committer | Robert Foss <robert.foss@linaro.org> | 2022-06-15 19:03:44 +0300 |
| commit | 3f49f7591e7150c502aa8d04354941ec2394153f (patch) | |
| tree | 2d003616fcd90ffdcb2bc2669bb36072bbb6a39f /drivers/gpu/drm/bridge/analogix | |
| parent | 0d4e57e5af39fef28de6c89b0b97741dedb4b72f (diff) | |
| download | linux-3f49f7591e7150c502aa8d04354941ec2394153f.tar.xz | |
drm/bridge: anx7625: Zero error variable when panel bridge not present
While parsing the DT, the anx7625 driver checks for the presence of a
panel bridge on endpoint 1. If it is missing, pdata->panel_bridge stores
the error pointer and the function returns successfully without first
cleaning that variable. This is an issue since other functions later
check for the presence of a panel bridge by testing the trueness of that
variable.
In order to ensure proper behavior, zero out pdata->panel_bridge before
returning when no panel bridge is found.
Fixes: 9e82ea0fb1df ("drm/bridge: anx7625: switch to devm_drm_of_get_bridge")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220613163705.1531721-1-nfraprado@collabora.com
Diffstat (limited to 'drivers/gpu/drm/bridge/analogix')
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/anx7625.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index bbdca16db0d6..f08f3307079e 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1658,8 +1658,10 @@ static int anx7625_parse_dt(struct device *dev, pdata->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0); if (IS_ERR(pdata->panel_bridge)) { - if (PTR_ERR(pdata->panel_bridge) == -ENODEV) + if (PTR_ERR(pdata->panel_bridge) == -ENODEV) { + pdata->panel_bridge = NULL; return 0; + } return PTR_ERR(pdata->panel_bridge); } |