From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 26 Jan 2017 11:44:09 +0000 (+0000)
Subject: drm: Silence the compiler for drm_mode_get_hv_timings()
X-Git-Tag: v4.14-rc1~8^2~52^2~799
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6f15f84c38d1d4f389f41b947b9b884d32ddb884;p=platform%2Fkernel%2Flinux-rpi.git

drm: Silence the compiler for drm_mode_get_hv_timings()

Since moving drm_crtc_get_hv_timings() into drm_modes.c, the compiler
has been able to get smarter and spots that drm_mode_copy() is trying to
preserve garbage from the stack.

Fixes: 196cd5d3758c ("drm: s/drm_crtc_get_hv_timings/drm_mode_get_hv_timings/")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170126114409.9115-1-chris@chris-wilson.co.uk
---

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 1d9d4ca..30c716c 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -808,9 +808,8 @@ EXPORT_SYMBOL(drm_mode_vrefresh);
 void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
 			    int *hdisplay, int *vdisplay)
 {
-	struct drm_display_mode adjusted;
+	struct drm_display_mode adjusted = *mode;
 
-	drm_mode_copy(&adjusted, mode);
 	drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
 	*hdisplay = adjusted.crtc_hdisplay;
 	*vdisplay = adjusted.crtc_vdisplay;