diff options
| author | Dilip Kota <dkota@codeaurora.org> | 2016-03-21 11:28:51 +0530 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-07-27 13:41:16 -0700 |
| commit | 97442af04a66583690a7882cd1058b1efd3746ab (patch) | |
| tree | dcdf08115cf11eaa60f05d33ed3aa4e8107063f3 | |
| parent | 067b2cf5fd4c2c112ac8af07577cea49ece9e49c (diff) | |
slim-msm: Synchronize SSR callbacks
Subsystem will restart within short timeframe.
Synchronise subsytem up/down callback notifications
to avoid functionality failures.
Use mutex locks to achieve synchronization.
Change-Id: I5881c7d468507bb8402a2e9f8178b9c31e57e8a5
Signed-off-by: Dilip Kota <dkota@codeaurora.org>
| -rw-r--r-- | drivers/slimbus/slim-msm-ngd.c | 5 | ||||
| -rw-r--r-- | drivers/slimbus/slim-msm.h | 3 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/slimbus/slim-msm-ngd.c b/drivers/slimbus/slim-msm-ngd.c index a1632266cf7d..98fce5e5c06a 100644 --- a/drivers/slimbus/slim-msm-ngd.c +++ b/drivers/slimbus/slim-msm-ngd.c @@ -1470,11 +1470,13 @@ static void ngd_adsp_down(struct msm_slim_ctrl *dev) struct slim_controller *ctrl = &dev->ctrl; struct slim_device *sbdev; + mutex_lock(&dev->ssr_lock); ngd_slim_enable(dev, false); /* device up should be called again after SSR */ list_for_each_entry(sbdev, &ctrl->devs, dev_list) slim_report_absent(sbdev); SLIM_INFO(dev, "SLIM ADSP SSR (DOWN) done\n"); + mutex_unlock(&dev->ssr_lock); } static void ngd_adsp_up(struct work_struct *work) @@ -1483,7 +1485,9 @@ static void ngd_adsp_up(struct work_struct *work) container_of(work, struct msm_slim_qmi, ssr_up); struct msm_slim_ctrl *dev = container_of(qmi, struct msm_slim_ctrl, qmi); + mutex_lock(&dev->ssr_lock); ngd_slim_enable(dev, true); + mutex_unlock(&dev->ssr_lock); } static ssize_t show_mask(struct device *device, struct device_attribute *attr, @@ -1647,6 +1651,7 @@ static int ngd_slim_probe(struct platform_device *pdev) init_completion(&dev->reconf); init_completion(&dev->ctrl_up); mutex_init(&dev->tx_lock); + mutex_init(&dev->ssr_lock); spin_lock_init(&dev->tx_buf_lock); spin_lock_init(&dev->rx_lock); dev->ee = 1; diff --git a/drivers/slimbus/slim-msm.h b/drivers/slimbus/slim-msm.h index 86d2606182fa..7859d1e79e39 100644 --- a/drivers/slimbus/slim-msm.h +++ b/drivers/slimbus/slim-msm.h @@ -1,4 +1,4 @@ -/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. +/* Copyright (c) 2011-2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -284,6 +284,7 @@ struct msm_slim_ctrl { struct clk *rclk; struct clk *hclk; struct mutex tx_lock; + struct mutex ssr_lock; spinlock_t tx_buf_lock; u8 pgdla; enum msm_slim_msgq use_rx_msgqs; |