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https://github.com/Divested-Mobile/DivestOS-Build.git
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75 lines
2.6 KiB
Diff
75 lines
2.6 KiB
Diff
From a225074c0494ca8125ca0ac2f9ebc8a2bd3612de Mon Sep 17 00:00:00 2001
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From: Dilip Kota <dkota@codeaurora.org>
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Date: Mon, 21 Mar 2016 11:28:51 +0530
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Subject: slim-msm: Synchronize SSR callbacks
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Subsystem will restart within short timeframe.
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Synchronise subsytem up/down callback notifications
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to avoid functionality failures.
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Use mutex locks to achieve synchronization.
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Change-Id: I5881c7d468507bb8402a2e9f8178b9c31e57e8a5
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Signed-off-by: Dilip Kota <dkota@codeaurora.org>
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---
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drivers/slimbus/slim-msm-ngd.c | 5 +++++
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drivers/slimbus/slim-msm.h | 3 ++-
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2 files changed, 7 insertions(+), 1 deletion(-)
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diff --git a/drivers/slimbus/slim-msm-ngd.c b/drivers/slimbus/slim-msm-ngd.c
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index 3684984..1328e76 100644
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--- a/drivers/slimbus/slim-msm-ngd.c
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+++ b/drivers/slimbus/slim-msm-ngd.c
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@@ -1449,11 +1449,13 @@ static void ngd_adsp_down(struct msm_slim_ctrl *dev)
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struct slim_controller *ctrl = &dev->ctrl;
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struct slim_device *sbdev;
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+ mutex_lock(&dev->ssr_lock);
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ngd_slim_enable(dev, false);
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/* device up should be called again after SSR */
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list_for_each_entry(sbdev, &ctrl->devs, dev_list)
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slim_report_absent(sbdev);
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SLIM_INFO(dev, "SLIM ADSP SSR (DOWN) done\n");
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+ mutex_unlock(&dev->ssr_lock);
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}
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static void ngd_adsp_up(struct work_struct *work)
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@@ -1462,7 +1464,9 @@ static void ngd_adsp_up(struct work_struct *work)
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container_of(work, struct msm_slim_qmi, ssr_up);
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struct msm_slim_ctrl *dev =
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container_of(qmi, struct msm_slim_ctrl, qmi);
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+ mutex_lock(&dev->ssr_lock);
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ngd_slim_enable(dev, true);
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+ mutex_unlock(&dev->ssr_lock);
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}
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static ssize_t show_mask(struct device *device, struct device_attribute *attr,
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@@ -1626,6 +1630,7 @@ static int ngd_slim_probe(struct platform_device *pdev)
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init_completion(&dev->reconf);
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init_completion(&dev->ctrl_up);
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mutex_init(&dev->tx_lock);
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+ mutex_init(&dev->ssr_lock);
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spin_lock_init(&dev->tx_buf_lock);
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spin_lock_init(&dev->rx_lock);
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dev->ee = 1;
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diff --git a/drivers/slimbus/slim-msm.h b/drivers/slimbus/slim-msm.h
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index 86d2606..7859d1e 100644
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--- a/drivers/slimbus/slim-msm.h
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+++ b/drivers/slimbus/slim-msm.h
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@@ -1,4 +1,4 @@
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-/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
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+/* Copyright (c) 2011-2016, 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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@@ -284,6 +284,7 @@ struct msm_slim_ctrl {
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struct clk *rclk;
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struct clk *hclk;
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struct mutex tx_lock;
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+ struct mutex ssr_lock;
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spinlock_t tx_buf_lock;
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u8 pgdla;
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enum msm_slim_msgq use_rx_msgqs;
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--
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cgit v1.1
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