From: Jiasheng Jiang jiasheng@iscas.ac.cn
[ Upstream commit 831463667b5f4f1e5bce9c3b94e9e794d2bc8923 ]
As mipi_dsi_driver_register could return error if fails, it should be better to check the return value and return error if fails. Moreover, if i2c_add_driver fails, mipi_dsi_driver_register should be reverted.
Fixes: 1e4d58cd7f88 ("drm/bridge: adv7533: Create a MIPI DSI device") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Sam Ravnborg sam@ravnborg.org Link: https://patchwork.freedesktop.org/patch/msgid/20220602103401.2980938-1-jiash... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 074c2e650cae..38bf28720f3a 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -1393,10 +1393,21 @@ static struct i2c_driver adv7511_driver = {
static int __init adv7511_init(void) { - if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) - mipi_dsi_driver_register(&adv7533_dsi_driver); + int ret; + + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) { + ret = mipi_dsi_driver_register(&adv7533_dsi_driver); + if (ret) + return ret; + }
- return i2c_add_driver(&adv7511_driver); + ret = i2c_add_driver(&adv7511_driver); + if (ret) { + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) + mipi_dsi_driver_unregister(&adv7533_dsi_driver); + } + + return ret; } module_init(adv7511_init);