It's now safe to let fbcon unbind automatically on fbdev unregister.
The crash problem was fixed in commit 2122b40580dd
("fbdev: fbcon: Fix unregister crash when more than one framebuffer")
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 523b1067f1ed..18a5593cc9ec 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -2999,7 +2999,8 @@ static int drm_fbdev_fb_open(struct fb_info *info, int user)
{
struct drm_fb_helper *fb_helper = info->par;
- if (!try_module_get(fb_helper->dev->driver->fops->owner))
+ /* No need to take a ref for fbcon because it unbinds on unregister */
+ if (user && !try_module_get(fb_helper->dev->driver->fops->owner))
return -ENODEV;
return 0;
@@ -3009,7 +3010,8 @@ static int drm_fbdev_fb_release(struct fb_info *info, int user)
{
struct drm_fb_helper *fb_helper = info->par;
- module_put(fb_helper->dev->driver->fops->owner);
+ if (user)
+ module_put(fb_helper->dev->driver->fops->owner);
return 0;
}
--
2.20.1
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