[patch v2] drm/tegra: fix small leak on error in tegra_fb_alloc()

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If we don't have enough memory for ->planes then we leak "fb".

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
v2: tiny style changes

diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
index 490f771..f9d2de6 100644
--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -98,8 +98,10 @@ static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
 		return ERR_PTR(-ENOMEM);
 
 	fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
-	if (!fb->planes)
+	if (!fb->planes) {
+		kfree(fb);
 		return ERR_PTR(-ENOMEM);
+	}
 
 	fb->num_planes = num_planes;
 
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