From e902a358c753b93245083201c02312a580cf13d4 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 4 Jun 2010 12:23:21 +0200 Subject: [PATCH] drm/drm_crtc: return -EFAULT on copy_to_user errors 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 Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_crtc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 994d23b..57cea01 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -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) { -- 1.8.2.3