fb is being dereferenced before it is null checked, hence there
is a potential null pointer dereference.
Fix this by moving the pointer dereference after fb has been
properly null checked at line 74: if (!fb)
Addresses-Coverity-ID: 1470169 ("Dereference before null check")
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
drivers/gpu/drm/gma500/gma_display.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/gma500/gma_display.c
b/drivers/gpu/drm/gma500/gma_display.c
index c8f071c..f767579 100644
--- a/drivers/gpu/drm/gma500/gma_display.c
+++ b/drivers/gpu/drm/gma500/gma_display.c
@@ -60,7 +60,7 @@ int gma_pipe_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_psb_private *dev_priv = dev->dev_private;
struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
struct drm_framebuffer *fb = crtc->primary->fb;
- struct gtt_range *gtt = to_gtt_range(fb->obj[0]);
+ struct gtt_range *gtt;
int pipe = gma_crtc->pipe;
const struct psb_offset *map = &dev_priv->regmap[pipe];
unsigned long start, offset;
@@ -76,6 +76,8 @@ int gma_pipe_set_base(struct drm_crtc *crtc, int x, int y,
goto gma_pipe_cleaner;
}
+ gtt = to_gtt_range(fb->obj[0]);
+
/* We are displaying this buffer, make sure it is actually loaded
into the GTT */
ret = psb_gtt_pin(gtt);
--
2.7.4
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