linux-kernel - [PATCH 5.7 250/265] drm/amdgpu/display: Unlock mutex on error

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Message-Id: <20200629151818.2493727-251-sashal@kernel.org>
Date:   Mon, 29 Jun 2020 11:18:03 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     John van der Kamp <sjonny@...fe.me.uk>,
        Alex Deucher <alexander.deucher@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 5.7 250/265] drm/amdgpu/display: Unlock mutex on error

From: John van der Kamp <sjonny@...fe.me.uk>

commit ee434a4f9f5ea15b0f84bddd8c012838cf9472c5 upstream.

Make sure we pass through ret label to unlock the mutex.

Signed-off-by: John van der Kamp <sjonny@...fe.me.uk>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
index dcf84a61de37f..949d10ef83040 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
@@ -510,8 +510,10 @@ static ssize_t srm_data_read(struct file *filp, struct kobject *kobj, struct bin
 
 	srm = psp_get_srm(work->hdcp.config.psp.handle, &srm_version, &srm_size);
 
-	if (!srm)
-		return -EINVAL;
+	if (!srm) {
+		ret = -EINVAL;
+		goto ret;
+	}
 
 	if (pos >= srm_size)
 		ret = 0;
-- 
2.25.1