From: Ville Syrjälä Date: Tue, 7 Mar 2017 19:42:08 +0000 (+0200) Subject: drm/i915: Avoid div-by-zero when computing aux_stride w/o an aux plane X-Git-Tag: v4.12-rc1~116^2~28^2~106 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=1b500535c513ac57fff89e917bda5863739636ad;p=linux.git drm/i915: Avoid div-by-zero when computing aux_stride w/o an aux plane To make life easier let's allow skl_plane_stride() to be called for the AUX surface even when there is no AUX surface. Avoids special cases in the callers. Signed-off-by: Ville Syrjälä Reviewed-by: Imre Deak Link: http://patchwork.freedesktop.org/patch/msgid/20170307194210.13400-4-ville.syrjala@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index e4474efe84f2..2f60b929acf5 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3218,7 +3218,12 @@ static void skl_detach_scalers(struct intel_crtc *intel_crtc) u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane, unsigned int rotation) { - u32 stride = intel_fb_pitch(fb, plane, rotation); + u32 stride; + + if (plane >= fb->format->num_planes) + return 0; + + stride = intel_fb_pitch(fb, plane, rotation); /* * The stride is either expressed as a multiple of 64 bytes chunks for