Merge "msm: npu: Fix race condition issue during npu power contrl" (a36b8b9b) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/media/platform/msm/npu/npu_dev.c

+9 −2

Original line number	Diff line number	Diff line
		/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
		/* Copyright (c) 2017-2019, 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
		@@ -478,6 +478,7 @@ int npu_enable_core_power(struct npu_device *npu_dev)
		struct npu_pwrctrl *pwr = &npu_dev->pwrctrl;
		int ret = 0;

		mutex_lock(&npu_dev->dev_lock);
		if (!pwr->pwr_vote_num) {
		ret = npu_enable_regulators(npu_dev);
		if (ret)
		@@ -492,6 +493,7 @@ int npu_enable_core_power(struct npu_device *npu_dev)
		npu_resume_devbw(npu_dev);
		}
		pwr->pwr_vote_num++;
		mutex_unlock(&npu_dev->dev_lock);

		return ret;
		}
		@@ -501,8 +503,12 @@ void npu_disable_core_power(struct npu_device *npu_dev)
		struct npu_pwrctrl *pwr = &npu_dev->pwrctrl;
		struct npu_thermalctrl *thermalctrl = &npu_dev->thermalctrl;

		if (!pwr->pwr_vote_num)
		mutex_lock(&npu_dev->dev_lock);
		if (!pwr->pwr_vote_num) {
		mutex_unlock(&npu_dev->dev_lock);
		return;
		}

		pwr->pwr_vote_num--;
		if (!pwr->pwr_vote_num) {
		npu_suspend_devbw(npu_dev);
		@@ -514,6 +520,7 @@ void npu_disable_core_power(struct npu_device *npu_dev)
		pr_debug("setting back to power level=%d\n",
		pwr->active_pwrlevel);
		}
		mutex_unlock(&npu_dev->dev_lock);
		}

		static int npu_enable_core_clocks(struct npu_device *npu_dev)