Commit 951a7261 authored Nov 19, 2019 by Aravind Venkateswaran

disp: msm: dp: fix locking during link maintenance



Ensure that session lock is held while handling link maintenance
to ensure that connect/disconnect handling and link maintenance are
serialized. This will avoid un-intended interleaving of session
setup/teardown with link maintenance which can result in link training
failures.

CRs-Fixed: 2565704
Change-Id: I96bb5b01a80433e26d675a019b8827de9fecb75b
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>

parent 90a954a0

msm/dp/dp_display.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -1289,7 +1289,6 @@ static void dp_display_attention_work(struct work_struct *work)

		mutex_lock(&dp->session_lock);
		dp_audio_enable(dp, false);
		mutex_unlock(&dp->session_lock);

		if (dp->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) {
		SDE_EVT32_EXTERNAL(dp->state,
		@@ -1308,7 +1307,6 @@ static void dp_display_attention_work(struct work_struct *work)
		dp->ctrl->link_maintenance(dp->ctrl);
		}

		mutex_lock(&dp->session_lock);
		dp_audio_enable(dp, true);
		mutex_unlock(&dp->session_lock);