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drm: tegra: Check return value of drm_vblank_get()

PATCH New Alexandre Courbot 1 participant 1 message Oct 9, 2014

Subsystems (3)
DRM drivers Tegra architecture support DRM drivers for NVIDIA Tegra
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Alexandre Courbot

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PATCH 1/1 drm: tegra: Check return value of drm_vblank_get()

drm_vblank_get() can return an error, which we should propagate.

Signed-off-by Alexandre Courbot <[email protected]>
---
 drivers/gpu/drm/tegra/dc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
drivers/gpu/drm/tegra/dc.c +4 -1
index 6553fd238685..b08df07cad47 100644
@@ -699,6 +699,7 @@ static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 {
 	struct tegra_dc *dc = to_tegra_dc(crtc);
 	struct drm_device *drm = crtc->dev;
+	int ret;
 
 	if (dc->event)
 		return -EBUSY;

@@ -706,7 +707,9 @@ static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 	if (event) {
 		event->pipe = dc->pipe;
 		dc->event = event;
-		drm_vblank_get(drm, dc->pipe);
+		ret = drm_vblank_get(drm, dc->pipe);
+		if (ret < 0)
+			return ret;
 	}
 
 	tegra_dc_set_base(dc, 0, 0, fb);
Signature · 1 line
2.1.2