From 1b842c89bd8eb0e9619e1aba071c9a5529b7a179 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Wed, 21 Jan 2015 13:50:54 +0000 Subject: [PATCH] drm/i915: Fix kzalloc() smatch warnings in get_initial_plane_config() Smatch doesn't like: struct drm_framebuffer *fb; fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); and warns with: warn: struct type mismatch 'drm_framebuffer vs intel_framebuffer' This implicit cast was correct as struct intel_framebuffer has struct drm_framebuffer as its first member, but in case someone want to reorder the fields for some reason, it's slightly safer to access the underlying drm_framebuffer through intel_fb->base. Also, having fewer static analysis warnings is a worthy goal. Cc: kbuild@01.org Cc: Dan Carpenter Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 65fce56646b9..01dc80b50df5 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6584,13 +6584,16 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc, int fourcc, pixel_format; int aligned_height; struct drm_framebuffer *fb; + struct intel_framebuffer *intel_fb; - fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); - if (!fb) { + intel_fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); + if (!intel_fb) { DRM_DEBUG_KMS("failed to alloc fb\n"); return; } + fb = &intel_fb->base; + val = I915_READ(DSPCNTR(plane)); if (INTEL_INFO(dev)->gen >= 4) @@ -7613,13 +7616,16 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc, int fourcc, pixel_format; int aligned_height; struct drm_framebuffer *fb; + struct intel_framebuffer *intel_fb; - fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); - if (!fb) { + intel_fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); + if (!intel_fb) { DRM_DEBUG_KMS("failed to alloc fb\n"); return; } + fb = &intel_fb->base; + val = I915_READ(PLANE_CTL(pipe, 0)); if (val & PLANE_CTL_TILED_MASK) plane_config->tiling = I915_TILING_X; @@ -7706,13 +7712,16 @@ ironlake_get_initial_plane_config(struct intel_crtc *crtc, int fourcc, pixel_format; int aligned_height; struct drm_framebuffer *fb; + struct intel_framebuffer *intel_fb; - fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); - if (!fb) { + intel_fb = kzalloc(sizeof(struct intel_framebuffer), GFP_KERNEL); + if (!intel_fb) { DRM_DEBUG_KMS("failed to alloc fb\n"); return; } + fb = &intel_fb->base; + val = I915_READ(DSPCNTR(pipe)); if (INTEL_INFO(dev)->gen >= 4) -- 2.39.2