[PATCH] Fix typo in include/drm/i915_drm.h

Signed-off-by: Ole Henrik Jahren <olehenja@alumni.ntnu.no>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
---

While adding DRM ioctl decoding support to strace, I noticed something
that looks very much like a typo. If it is intended this way, sorry
about the noise.

include/drm/i915_drm.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 0039f1f..ca7b8af 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -237,7 +237,7 @@ typedef struct _drm_i915_sarea {
#define DRM_IOCTL_I915_GEM_GET_APERTURE DRM_IOR (DRM_COMMAND_BASE + DRM_I915_GEM_GET_APERTURE, struct drm_i915_gem_get_aperture)
#define DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_PIPE_FROM_CRTC_ID, struct drm_i915_get_pipe_from_crtc_id)
#define DRM_IOCTL_I915_GEM_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MADVISE, struct drm_i915_gem_madvise)
-#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE DRM_IOW(DRM_COMMAND_BASE + DRM_IOCTL_I915_OVERLAY_ATTRS, struct drm_intel_overlay_put_image)
+#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE DRM_IOW(DRM_COMMAND_BASE + DRM_I915_OVERLAY_PUT_IMAGE, struct drm_intel_overlay_put_image)
#define DRM_IOCTL_I915_OVERLAY_ATTRS DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_OVERLAY_ATTRS, struct drm_intel_overlay_attrs)

/* Allow drivers to submit batchbuffers directly to hardware, relying
--
1.7.5.rc1

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Indeed, good catch. Luckily never ever used (libdrm takes care of it
internally) in the drmCommand(Write|Read) functions.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

On Tue, Apr 12, 2011 at 6:10 AM, Ole Henrik Jahren
<olehenja@alumni.ntnu.no> wrote:
> Signed-off-by: Ole Henrik Jahren <olehenja@alumni.ntnu.no>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>
> While adding DRM ioctl decoding support to strace, I noticed something
> that looks very much like a typo. If it is intended this way, sorry
> about the noise.
>
>  include/drm/i915_drm.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
> index 0039f1f..ca7b8af 100644
> --- a/include/drm/i915_drm.h
> +++ b/include/drm/i915_drm.h
> @@ -237,7 +237,7 @@ typedef struct _drm_i915_sarea {
>  #define DRM_IOCTL_I915_GEM_GET_APERTURE        DRM_IOR  (DRM_COMMAND_BASE + DRM_I915_GEM_GET_APERTURE, struct drm_i915_gem_get_aperture)
>  #define DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_PIPE_FROM_CRTC_ID, struct drm_i915_get_pipe_from_crtc_id)
>  #define DRM_IOCTL_I915_GEM_MADVISE     DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MADVISE, struct drm_i915_gem_madvise)
> -#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE       DRM_IOW(DRM_COMMAND_BASE + DRM_IOCTL_I915_OVERLAY_ATTRS, struct drm_intel_overlay_put_image)
> +#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE       DRM_IOW(DRM_COMMAND_BASE + DRM_I915_OVERLAY_PUT_IMAGE, struct drm_intel_overlay_put_image)
>  #define DRM_IOCTL_I915_OVERLAY_ATTRS   DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_OVERLAY_ATTRS, struct drm_intel_overlay_attrs)
>
>  /* Allow drivers to submit batchbuffers directly to hardware, relying
> --
> 1.7.5.rc1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> [lists.freedesktop.org]
>



--
Daniel Vetter
daniel.vetter@ffwll.ch - +41 (0) 79 364 57 48 - [blog.ffwll.ch]
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Calling ioctl with DRM_IOCTL_I915_OVERLAY_PUT_IMAGE is broken if the
macro is used directly, because the define contains a typo. When using
libdrm you do not hit the bug, since libdrm handles the ioctl encoding
internally.

The typo also leads to the .cmd and .cmd_drv fields of the drm_ioctl
structure for DRM_I915_OVERLAY_PUT_IMAGE having inconsistent content.

Signed-off-by: Ole Henrik Jahren <olehenja@alumni.ntnu.no>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---

Included a bit more explanation about the problem. The impact of the
inconsistency between .cmd and .cmd_drv does not seem to have any impact,
since the only thing .cmd_drv seems to be used for is calculating the
size of the copy_from_user() buffer. It incidentally result in the same
size both with and without this patch (at least on 64bit).

include/drm/i915_drm.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 0039f1f..ca7b8af 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -237,7 +237,7 @@ typedef struct _drm_i915_sarea {
#define DRM_IOCTL_I915_GEM_GET_APERTURE DRM_IOR (DRM_COMMAND_BASE + DRM_I915_GEM_GET_APERTURE, struct drm_i915_gem_get_aperture)
#define DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_PIPE_FROM_CRTC_ID, struct drm_i915_get_pipe_from_crtc_id)
#define DRM_IOCTL_I915_GEM_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MADVISE, struct drm_i915_gem_madvise)
-#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE DRM_IOW(DRM_COMMAND_BASE + DRM_IOCTL_I915_OVERLAY_ATTRS, struct drm_intel_overlay_put_image)
+#define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE DRM_IOW(DRM_COMMAND_BASE + DRM_I915_OVERLAY_PUT_IMAGE, struct drm_intel_overlay_put_image)
#define DRM_IOCTL_I915_OVERLAY_ATTRS DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_OVERLAY_ATTRS, struct drm_intel_overlay_attrs)

/* Allow drivers to submit batchbuffers directly to hardware, relying
--
1.7.5.rc1

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