[PATCH 5.15 038/121] drm/amd/display: fix memory leak when using debugfs_lookup()

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh at linuxfoundation.org>

commit cbfac7fa491651c57926c99edeb7495c6c1aeac2 upstream.

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  Fix this up by properly
calling dput().

Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Leo Li <sunpeng.li at amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: "Christian König" <christian.koenig at amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan at amd.com>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Wayne Lin <Wayne.Lin at amd.com>
Cc: hersen wu <hersenxs.wu at amd.com>
Cc: Wenjing Liu <wenjing.liu at amd.com>
Cc: Patrik Jakobsson <patrik.r.jakobsson at gmail.com>
Cc: Thelford Williams <tdwilliamsiv at gmail.com>
Cc: Fangzhi Zuo <Jerry.Zuo at amd.com>
Cc: Yongzhi Liu <lyz_cs at pku.edu.cn>
Cc: Mikita Lipski <mikita.lipski at amd.com>
Cc: Jiapeng Chong <jiapeng.chong at linux.alibaba.com>
Cc: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
Cc: Sean Paul <seanpaul at chromium.org>
Cc: amd-gfx at lists.freedesktop.org
Cc: dri-devel at lists.freedesktop.org
Cc: stable at vger.kernel.org
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -3007,7 +3007,7 @@ void crtc_debugfs_init(struct drm_crtc *
 				   &crc_win_y_end_fops);
 	debugfs_create_file_unsafe("crc_win_update", 0644, dir, crtc,
 				   &crc_win_update_fops);
-
+	dput(dir);
 }
 #endif
 /*