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 gustavo@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);