On Mon, Dec 21, 2015 at 07:53:59PM +0100, Borislav Petkov wrote:

From: Borislav Petkov bp@suse.de

gcc complains on 32-bit like this:

drivers/gpu/drm/i915/intel_display.c: In function ‘intel_plane_obj_offset’: drivers/gpu/drm/i915/intel_display.c:2954:11: warning: cast to pointer from \ integer of different size [-Wint-to-pointer-cast] offset = (unsigned char *)vma->node.start; ^

because vma->node.start is u64 but a pointer on 32-bit is 4 bytes.

Do the calculations with an unsigned long directly and save us the casts.

Cc: Daniel Vetter daniel.vetter@intel.com Cc: Jani Nikula jani.nikula@linux.intel.com Cc: David Airlie airlied@linux.ie Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Borislav Petkov bp@suse.de

This has been fixed already in

commit 44eb0cb9620c6a53ec8e7073262e2af8079b727f Author: Mika Kuoppala mika.kuoppala@linux.intel.com Date: Fri Oct 30 13:26:15 2015 +0200

drm/i915: Avoid pointer arithmetic in calculating plane surface offset

Cheers, Daniel

---

drivers/gpu/drm/i915/intel_display.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 62211abe4922..640cb7c9b7f3 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2941,7 +2941,7 @@ unsigned long intel_plane_obj_offset(struct intel_plane *intel_plane, { const struct i915_ggtt_view *view = &i915_ggtt_view_normal; struct i915_vma *vma;

• unsigned char *offset;

• unsigned long offset;

  if (intel_rotation_90_or_270(intel_plane->base.state->rotation)) view = &i915_ggtt_view_rotated;

@@ -2951,14 +2951,14 @@ unsigned long intel_plane_obj_offset(struct intel_plane *intel_plane, view->type)) return -1;

• offset = (unsigned char *)vma->node.start;

• offset = vma->node.start;

  if (plane == 1) { offset += vma->ggtt_view.rotation_info.uv_start_page * PAGE_SIZE; }

• return (unsigned long)offset;

• return offset;

}

static void skl_detach_scaler(struct intel_crtc *intel_crtc, int id)

2.3.5

---

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