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drm: Add missing field copy in compat_drm_version

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DRM_IOCTL_VERSION is supposed to update the name_len/date_len/desc_len
fields to user.

Fixes: 012c6741c6aa ("switch compat_drm_version() to drm_ioctl_kernel()")
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeffy Chen 2017-07-12 14:18:32 +08:00 committed by Linus Torvalds
parent 4ca6df1348
commit 266530b34c
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_ioc32.c
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@ -112,6 +112,9 @@ static int compat_drm_version(struct file *file, unsigned int cmd,
v32.version_major = v.version_major;
v32.version_minor = v.version_minor;
v32.version_patchlevel = v.version_patchlevel;
v32.name_len = v.name_len;
v32.date_len = v.date_len;
v32.desc_len = v.desc_len;
if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
return -EFAULT;
return 0;