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drm/drm_crtc: return -EFAULT on copy_to_user errors

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copy_from_user() returns the number of bytes left to be copied but we
want to return a negative error code here.  This is in the ioctl handler
so the error code get returned to userspace.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dan Carpenter 2010-06-04 12:23:21 +02:00 committed by Dave Airlie
parent fc2362afd5
commit e902a358c7
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/drm_crtc.c
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@ -1840,8 +1840,10 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
ret = copy_from_user(clips, clips_ptr,
num_clips * sizeof(*clips));
if (ret)
if (ret) {
ret = -EFAULT;
goto out_err2;
}
}
if (fb->funcs->dirty) {