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51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
From 970edf007fbe64b094437541a42477d653802d85 Mon Sep 17 00:00:00 2001
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From: Benjamin Chan <bkchan@codeaurora.org>
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Date: Mon, 6 Mar 2017 11:48:27 -0500
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Subject: msm: mdss: Add lock to avoid release of active session in rotator
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Add mutex lock to protect an active rotator session from being closed.
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Without the lock, this can happen if a rotator closing IOCTL is
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called from a separate thread.
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CRs-Fixed: 2006159
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Change-Id: I927a0c626bdae5ef149e12979ec4befdbac1b7f7
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Signed-off-by: Benjamin Chan <bkchan@codeaurora.org>
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---
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drivers/video/msm/mdss/mdss_rotator.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/video/msm/mdss/mdss_rotator.c b/drivers/video/msm/mdss/mdss_rotator.c
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index f23a05c..f3c40cf 100644
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--- a/drivers/video/msm/mdss/mdss_rotator.c
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+++ b/drivers/video/msm/mdss/mdss_rotator.c
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@@ -1,4 +1,4 @@
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-/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
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+/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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@@ -2059,10 +2059,12 @@ static int mdss_rotator_config_session(struct mdss_rot_mgr *mgr,
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return ret;
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}
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+ mutex_lock(&mgr->lock);
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perf = mdss_rotator_find_session(private, config.session_id);
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if (!perf) {
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pr_err("No session with id=%u could be found\n",
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config.session_id);
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+ mutex_unlock(&mgr->lock);
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return -EINVAL;
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}
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@@ -2085,6 +2087,7 @@ static int mdss_rotator_config_session(struct mdss_rot_mgr *mgr,
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config.output.format);
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done:
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ATRACE_END(__func__);
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+ mutex_unlock(&mgr->lock);
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return ret;
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}
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--
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cgit v1.1
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