[PATCH 4.16 034/110] drm: Match sysfs name in link removal to link creation

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Haneen Mohammed <hamohammed.sa@xxxxxxxxx>

commit 7f6df440b8623c441c42d070bf592e2d2c1fa9bb upstream.

This patch matches the sysfs name used in the unlinking with the
linking function. Otherwise, remove_compat_control_link() fails to remove
sysfs created by create_compat_control_link() in drm_dev_register().

Fixes: 6449b088dd51 ("drm: Add fake controlD* symlinks for backwards
compat")
Cc: Dave Airlie <airlied@xxxxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Emil Velikov <emil.l.velikov@xxxxxxxxx>
Cc: David Herrmann <dh.herrmann@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Gustavo Padovan <gustavo@xxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v4.10+
Signed-off-by: Haneen Mohammed <hamohammed.sa@xxxxxxxxx>
[seanpaul added Fixes and Cc tags]
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20180511041542.GA4253@haneen-vb
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/drm_drv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -716,7 +716,7 @@ static void remove_compat_control_link(s
 	if (!minor)
 		return;
 
-	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index);
+	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);
 	if (!name)
 		return;