This is a note to let you know that I've just added the patch titled
drm: Only use compat ioctl for addfb2 on X86/IA64
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-only-use-compat-ioctl-for-addfb2-on-x86-ia64.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 47a66e45d7a7613322549c2475ea9d809baaf514 Mon Sep 17 00:00:00 2001
From: "Kristian H. Kristensen" <hoegsberg@xxxxxxxxx>
Date: Tue, 13 Sep 2016 14:20:45 -0700
Subject: drm: Only use compat ioctl for addfb2 on X86/IA64
From: Kristian H. Kristensen <hoegsberg@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Kristian H. Kristensen <hoegsberg@xxxxxxxxxxxx>
[seanpaul added not at bottom of commit msg re: modifier]
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/1473801645-116011-1-git-send-email-hoegsberg@xxxxxxxxxxxx
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
};
/**
Patches currently in stable-queue which might be from hoegsberg@xxxxxxxxx are
queue-4.4/drm-only-use-compat-ioctl-for-addfb2-on-x86-ia64.patch
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