Re: [PATCH] drm/i915/bxt: Fix uninitialized variables in intel_check_sprite_plane

[Chris Wilson <chris@chris-wilson.co.uk>]

On Wed, Nov 18, 2015 at 05:43:52PM +0530, Nabendu Maiti wrote:
> Uninitialized variables (width, Height) in intel_check_sprite_plane
> leads to compilererror in O1 level. Initialize all declared variables
> to fix this issue.
> 
> Signed-off-by: Nabendu Maiti <nabendu.bikash.maiti@intel.com>

Or perhaps:

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 2b96f336589e..8d7b4eb5b5b9 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -747,7 +747,6 @@ intel_check_sprite_plane(struct drm_plane *plane,
        struct drm_framebuffer *fb = state->base.fb;
        int crtc_x, crtc_y;
        unsigned int crtc_w, crtc_h;
-       uint32_t src_x, src_y, src_w, src_h;
        struct drm_rect *src = &state->src;
        struct drm_rect *dst = &state->dst;
        const struct drm_rect *clip = &state->clip;
@@ -813,6 +812,8 @@ intel_check_sprite_plane(struct drm_plane *plane,
        crtc_h = drm_rect_height(dst);
 
        if (state->visible) {
+               u32 src_x, src_y, src_w, src_h;
+
                /* check again in case clipping clamped the results */
                hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
                if (hscale < 0) {
@@ -871,10 +872,9 @@ intel_check_sprite_plane(struct drm_plane *plane,
                        if (crtc_w == 0)
                                state->visible = false;
                }
-       }
 
                /* Check size restrictions when scaling */
-       if (state->visible && (src_w != crtc_w || src_h != crtc_h)) {
+               if (src_w != crtc_w || src_h != crtc_h) {
                        unsigned int width_bytes;
 
                        WARN_ON(!can_scale);
@@ -898,7 +898,6 @@ intel_check_sprite_plane(struct drm_plane *plane,
                        }
                }
 
-       if (state->visible) {
                src->x1 = src_x << 16;
                src->x2 = (src_x + src_w) << 16;
                src->y1 = src_y << 16;

And make both the compiler and reader happier
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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