[PATCH 4.4 085/118] drm: Only use compat ioctl for addfb2 on X86/IA64

Path	csiph.com!eternal-september.org!feeder.eternal-september.org!aioe.org!bofh.it!news.nic.it!robomod
From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.4 085/118] drm: Only use compat ioctl for addfb2 on X86/IA64
Date	Thu, 22 Sep 2016 19:40:02 +0200
Message-ID	<skg8y-Rq-41@gated-at.bofh.it> (permalink)
References	<skg8x-Rq-3@gated-at.bofh.it>
X-Mailer	git-send-email 2.10.0
User-Agent	quilt/0.64
MIME-Version	1.0
Content-Type	text/plain; charset=UTF-8
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	58
Organization	linux.* mail to news gateway
X-Original-Cc	Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Rob Clark <robdclark@gmail.com>, "Kristian H. Kristensen" <hoegsberg@chromium.org>, Sean Paul <seanpaul@chromium.org>, Dave Airlie <airlied@redhat.com>
X-Original-Date	Thu, 22 Sep 2016 19:29:45 +0200
X-Original-Message-ID	<20160922172942.943747378@linuxfoundation.org>
X-Original-References	<20160922172938.643879685@linuxfoundation.org>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	csiph.com linux.kernel:1489131

Show key headers only | View raw

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kristian H. Kristensen <hoegsberg@gmail.com>

commit 47a66e45d7a7613322549c2475ea9d809baaf514 upstream.

Similar to struct drm_update_draw, struct drm_mode_fb_cmd2 has an
unaligned 64 bit field (modifier). This get packed differently between
32 bit and 64 bit modes on architectures that can handle unaligned 64
bit access (X86 and IA64).  Other architectures pack the structs the
same and don't need the compat wrapper. Use the same condition for
drm_mode_fb_cmd2 as we use for drm_update_draw.

Note that only the modifier will be packed differently between compat
and non-compat versions.

Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org>
[seanpaul added not at bottom of commit msg re: modifier]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1473801645-116011-1-git-send-email-hoegsberg@chromium.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/drm_ioc32.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -1015,6 +1015,7 @@ static int compat_drm_wait_vblank(struct
 	return 0;
 }
 
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
 typedef struct drm_mode_fb_cmd232 {
 	u32 fb_id;
 	u32 width;
@@ -1071,6 +1072,7 @@ static int compat_drm_mode_addfb2(struct
 
 	return 0;
 }
+#endif
 
 static drm_ioctl_compat_t *drm_compat_ioctls[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
@@ -1104,7 +1106,9 @@ static drm_ioctl_compat_t *drm_compat_io
 	[DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
 #endif
 	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
 	[DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
+#endif
 };
 
 /**

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH 4.4 085/118] drm: Only use compat ioctl for addfb2 on X86/IA64 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-09-22 19:40 +0200

csiph-web