[PATCH v2 2/2] drm: error out with EBUSY when device has existing master

[Emil Velikov]

From: Emil Velikov <emil.velikov at collabora.com>

As requested by Adam, provide different error message for when the
device has an existing master. An audit of the following projects, shows
that the errno is used only for printf() purposes.

xorg/xserver
xorg/drivers/xf86-video-ati
xorg/drivers/xf86-video-amdgpu
xorg/drivers/xf86-video-intel
xorg/drivers/xf86-video-tegra
xorg/drivers/xf86-video-freedreno
xorg/drivers/xf86-video-nouveau
xorg/drivers/xf86-video-vmwgfx

qt/kwin/plasma
gtk/mutter/gnomeshell
efl/enlightment

Cc: Adam Jackson <ajax at redhat.com>
Suggested-by: Adam Jackson <ajax at redhat.com>
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
---
 drivers/gpu/drm/drm_auth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 37cac0a221ff..a312fe1be50c 100644
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -250,7 +250,7 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 		goto out_unlock;
 
 	if (dev->master) {
-		ret = -EINVAL;
+		ret = -EBUSY;
 		goto out_unlock;
 	}
 
-- 
2.25.1