diff options
| author | Thierry Reding <treding@nvidia.com> | 2014-11-06 14:12:08 +0100 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2014-11-13 16:14:48 +0100 |
| commit | 1d1e6fe9b5cd9e51c0b064b60f673a973cac38ba (patch) | |
| tree | 404e5b43d88a459e749d0a749ff41b6eebf5b9fc /drivers/gpu/drm/tegra/fb.c | |
| parent | 53ea72132df8dd62bb77b28df7b05074dcea96fe (diff) | |
| download | talos-op-linux-1d1e6fe9b5cd9e51c0b064b60f673a973cac38ba.tar.gz talos-op-linux-1d1e6fe9b5cd9e51c0b064b60f673a973cac38ba.zip | |
drm/tegra: Fix error handling cleanup
The DRM driver's ->load() implementation didn't do a good job (no job at
all really) cleaning up on failure. Fix that by undoing any prior setup
when an error occurs. This requires a bit of rework to make it possible
to clean up fbdev midway.
This was tested by injecting errors at various points during the
initialization sequence and verifying that error cleanup didn't crash
and no memory leaked (using kmemleak).
Reported-by: Stéphane Marchesin <marcheu@chromium.org>
Reported-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra/fb.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/fb.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c index 3513d12d5aa1..0474241ac2a4 100644 --- a/drivers/gpu/drm/tegra/fb.c +++ b/drivers/gpu/drm/tegra/fb.c @@ -289,6 +289,11 @@ static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm) return fbdev; } +static void tegra_fbdev_free(struct tegra_fbdev *fbdev) +{ + kfree(fbdev); +} + static int tegra_fbdev_init(struct tegra_fbdev *fbdev, unsigned int preferred_bpp, unsigned int num_crtc, @@ -322,7 +327,7 @@ fini: return err; } -static void tegra_fbdev_free(struct tegra_fbdev *fbdev) +static void tegra_fbdev_exit(struct tegra_fbdev *fbdev) { struct fb_info *info = fbdev->base.fbdev; @@ -345,7 +350,7 @@ static void tegra_fbdev_free(struct tegra_fbdev *fbdev) } drm_fb_helper_fini(&fbdev->base); - kfree(fbdev); + tegra_fbdev_free(fbdev); } void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev) @@ -393,6 +398,15 @@ int tegra_drm_fb_prepare(struct drm_device *drm) return 0; } +void tegra_drm_fb_free(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_TEGRA_FBDEV + struct tegra_drm *tegra = drm->dev_private; + + tegra_fbdev_free(tegra->fbdev); +#endif +} + int tegra_drm_fb_init(struct drm_device *drm) { #ifdef CONFIG_DRM_TEGRA_FBDEV @@ -413,6 +427,6 @@ void tegra_drm_fb_exit(struct drm_device *drm) #ifdef CONFIG_DRM_TEGRA_FBDEV struct tegra_drm *tegra = drm->dev_private; - tegra_fbdev_free(tegra->fbdev); + tegra_fbdev_exit(tegra->fbdev); #endif } |
