linux-kernel - [PATCH 4.14 23/95] drm: Match sysfs name in link removal to link creation

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Date:   Mon, 21 May 2018 23:11:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dave Airlie <airlied@...il.com>,
        Alex Deucher <alexander.deucher@....com>,
        Emil Velikov <emil.l.velikov@...il.com>,
        David Herrmann <dh.herrmann@...il.com>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org,
        Haneen Mohammed <hamohammed.sa@...il.com>
Subject: [PATCH 4.14 23/95] drm: Match sysfs name in link removal to link creation

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

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

From: Haneen Mohammed <hamohammed.sa@...il.com>

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@...il.com>
Cc: Alex Deucher <alexander.deucher@....com>
Cc: Emil Velikov <emil.l.velikov@...il.com>
Cc: David Herrmann <dh.herrmann@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Daniel Vetter <daniel.vetter@...el.com>
Cc: Gustavo Padovan <gustavo@...ovan.org>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Sean Paul <seanpaul@...omium.org>
Cc: David Airlie <airlied@...ux.ie>
Cc: dri-devel@...ts.freedesktop.org
Cc: <stable@...r.kernel.org> # v4.10+
Signed-off-by: Haneen Mohammed <hamohammed.sa@...il.com>
[seanpaul added Fixes and Cc tags]
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180511041542.GA4253@haneen-vb
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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
@@ -749,7 +749,7 @@ 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;