This patch resovles the infinite loop issue incurred when Exyno drm driver is enabled but all kms drivers are disabled on Exynos board by returning -EPROBE_DEFER only in case that there is kms device registered.
Signed-off-by: Inki Dae inki.dae@samsung.com --- drivers/gpu/drm/exynos/exynos_drm_drv.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c index ecc86aa..14c6af7 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c @@ -488,6 +488,12 @@ static struct component_match *exynos_drm_match_add(struct device *dev)
mutex_lock(&drm_component_lock);
+ /* Do not retry to probe if there is no any kms driver regitered. */ + if (list_empty(&drm_component_list)) { + mutex_unlock(&drm_component_lock); + return ERR_PTR(-ENODEV); + } + list_for_each_entry(cdev, &drm_component_list, list) { /* * Add components to master only in case that crtc and