Merge branch 'char-misc-linus' into 'char-misc-next' (2d41d2ab) · Commits · EulixOS / Software / Kernel

drivers/block/zram/zram_drv.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2021,7 +2021,8 @@ static ssize_t hot_add_show(struct class *class,
		return ret;
		return scnprintf(buf, PAGE_SIZE, "%d\n", ret);
		}
		static CLASS_ATTR_RO(hot_add);
		static struct class_attribute class_attr_hot_add =
		__ATTR(hot_add, 0400, hot_add_show, NULL);

		static ssize_t hot_remove_store(struct class *class,
		struct class_attribute *attr,

drivers/hwtracing/coresight/coresight-cti.c

+54 −42

Original line number	Diff line number	Diff line
		@@ -747,17 +747,50 @@ static int cti_dying_cpu(unsigned int cpu)
		return 0;
		}

		static int cti_pm_setup(struct cti_drvdata *drvdata)
		{
		int ret;

		if (drvdata->ctidev.cpu == -1)
		return 0;

		if (nr_cti_cpu)
		goto done;

		cpus_read_lock();
		ret = cpuhp_setup_state_nocalls_cpuslocked(
		CPUHP_AP_ARM_CORESIGHT_CTI_STARTING,
		"arm/coresight_cti:starting",
		cti_starting_cpu, cti_dying_cpu);
		if (ret) {
		cpus_read_unlock();
		return ret;
		}

		ret = cpu_pm_register_notifier(&cti_cpu_pm_nb);
		cpus_read_unlock();
		if (ret) {
		cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_CTI_STARTING);
		return ret;
		}

		done:
		nr_cti_cpu++;
		cti_cpu_drvdata[drvdata->ctidev.cpu] = drvdata;

		return 0;
		}

		/* release PM registrations */
		static void cti_pm_release(struct cti_drvdata *drvdata)
		{
		if (drvdata->ctidev.cpu >= 0) {
		if (--nr_cti_cpu == 0) {
		cpu_pm_unregister_notifier(&cti_cpu_pm_nb);
		if (drvdata->ctidev.cpu == -1)
		return;

		cpuhp_remove_state_nocalls(
		CPUHP_AP_ARM_CORESIGHT_CTI_STARTING);
		}
		cti_cpu_drvdata[drvdata->ctidev.cpu] = NULL;
		if (--nr_cti_cpu == 0) {
		cpu_pm_unregister_notifier(&cti_cpu_pm_nb);
		cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_CTI_STARTING);
		}
		}

		@@ -823,19 +856,14 @@ static int cti_probe(struct amba_device adev, const struct amba_id id)

		/* driver data*/
		drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
		if (!drvdata) {
		ret = -ENOMEM;
		dev_info(dev, "%s, mem err\n", __func__);
		goto err_out;
		}
		if (!drvdata)
		return -ENOMEM;

		/* Validity for the resource is already checked by the AMBA core */
		base = devm_ioremap_resource(dev, res);
		if (IS_ERR(base)) {
		ret = PTR_ERR(base);
		dev_err(dev, "%s, remap err\n", __func__);
		goto err_out;
		}
		if (IS_ERR(base))
		return PTR_ERR(base);

		drvdata->base = base;

		dev_set_drvdata(dev, drvdata);
		@@ -854,8 +882,7 @@ static int cti_probe(struct amba_device adev, const struct amba_id id)
		pdata = coresight_cti_get_platform_data(dev);
		if (IS_ERR(pdata)) {
		dev_err(dev, "coresight_cti_get_platform_data err\n");
		ret = PTR_ERR(pdata);
		goto err_out;
		return PTR_ERR(pdata);
		}

		/* default to powered - could change on PM notifications */
		@@ -867,35 +894,20 @@ static int cti_probe(struct amba_device adev, const struct amba_id id)
		drvdata->ctidev.cpu);
		else
		cti_desc.name = coresight_alloc_device_name(&cti_sys_devs, dev);
		if (!cti_desc.name) {
		ret = -ENOMEM;
		goto err_out;
		}
		if (!cti_desc.name)
		return -ENOMEM;

		/* setup CPU power management handling for CPU bound CTI devices. */
		if (drvdata->ctidev.cpu >= 0) {
		cti_cpu_drvdata[drvdata->ctidev.cpu] = drvdata;
		if (!nr_cti_cpu++) {
		cpus_read_lock();
		ret = cpuhp_setup_state_nocalls_cpuslocked(
		CPUHP_AP_ARM_CORESIGHT_CTI_STARTING,
		"arm/coresight_cti:starting",
		cti_starting_cpu, cti_dying_cpu);

		if (!ret)
		ret = cpu_pm_register_notifier(&cti_cpu_pm_nb);
		cpus_read_unlock();
		ret = cti_pm_setup(drvdata);
		if (ret)
		goto err_out;
		}
		}
		return ret;

		/* create dynamic attributes for connections */
		ret = cti_create_cons_sysfs(dev, drvdata);
		if (ret) {
		dev_err(dev, "%s: create dynamic sysfs entries failed\n",
		cti_desc.name);
		goto err_out;
		goto pm_release;
		}

		/* set up coresight component description */
		@@ -908,7 +920,7 @@ static int cti_probe(struct amba_device adev, const struct amba_id id)
		drvdata->csdev = coresight_register(&cti_desc);
		if (IS_ERR(drvdata->csdev)) {
		ret = PTR_ERR(drvdata->csdev);
		goto err_out;
		goto pm_release;
		}

		/* add to list of CTI devices */
		@@ -927,7 +939,7 @@ static int cti_probe(struct amba_device adev, const struct amba_id id)
		dev_info(&drvdata->csdev->dev, "CTI initialized\n");
		return 0;

		err_out:
		pm_release:
		cti_pm_release(drvdata);
		return ret;
		}

drivers/hwtracing/coresight/coresight-etm4x.c

+53 −29

Original line number	Diff line number	Diff line
		@@ -1388,18 +1388,57 @@ static struct notifier_block etm4_cpu_pm_nb = {
		.notifier_call = etm4_cpu_pm_notify,
		};

		static int etm4_cpu_pm_register(void)
		/* Setup PM. Called with cpus locked. Deals with error conditions and counts */
		static int etm4_pm_setup_cpuslocked(void)
		{
		if (IS_ENABLED(CONFIG_CPU_PM))
		return cpu_pm_register_notifier(&etm4_cpu_pm_nb);
		int ret;

		if (etm4_count++)
		return 0;

		ret = cpu_pm_register_notifier(&etm4_cpu_pm_nb);
		if (ret)
		goto reduce_count;

		ret = cpuhp_setup_state_nocalls_cpuslocked(CPUHP_AP_ARM_CORESIGHT_STARTING,
		"arm/coresight4:starting",
		etm4_starting_cpu, etm4_dying_cpu);

		if (ret)
		goto unregister_notifier;

		ret = cpuhp_setup_state_nocalls_cpuslocked(CPUHP_AP_ONLINE_DYN,
		"arm/coresight4:online",
		etm4_online_cpu, NULL);

		/* HP dyn state ID returned in ret on success */
		if (ret > 0) {
		hp_online = ret;
		return 0;
		}

		static void etm4_cpu_pm_unregister(void)
		/* failed dyn state - remove others */
		cpuhp_remove_state_nocalls_cpuslocked(CPUHP_AP_ARM_CORESIGHT_STARTING);

		unregister_notifier:
		cpu_pm_unregister_notifier(&etm4_cpu_pm_nb);

		reduce_count:
		--etm4_count;
		return ret;
		}

		static void etm4_pm_clear(void)
		{
		if (IS_ENABLED(CONFIG_CPU_PM))
		if (--etm4_count != 0)
		return;

		cpu_pm_unregister_notifier(&etm4_cpu_pm_nb);
		cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING);
		if (hp_online) {
		cpuhp_remove_state_nocalls(hp_online);
		hp_online = 0;
		}
		}

		static int etm4_probe(struct amba_device adev, const struct amba_id id)
		@@ -1453,24 +1492,15 @@ static int etm4_probe(struct amba_device adev, const struct amba_id id)
		etm4_init_arch_data, drvdata, 1))
		dev_err(dev, "ETM arch init failed\n");

		if (!etm4_count++) {
		cpuhp_setup_state_nocalls_cpuslocked(CPUHP_AP_ARM_CORESIGHT_STARTING,
		"arm/coresight4:starting",
		etm4_starting_cpu, etm4_dying_cpu);
		ret = cpuhp_setup_state_nocalls_cpuslocked(CPUHP_AP_ONLINE_DYN,
		"arm/coresight4:online",
		etm4_online_cpu, NULL);
		if (ret < 0)
		goto err_arch_supported;
		hp_online = ret;
		ret = etm4_pm_setup_cpuslocked();
		cpus_read_unlock();

		ret = etm4_cpu_pm_register();
		if (ret)
		goto err_arch_supported;
		/* etm4_pm_setup_cpuslocked() does its own cleanup - exit on error */
		if (ret) {
		etmdrvdata[drvdata->cpu] = NULL;
		return ret;
		}

		cpus_read_unlock();

		if (etm4_arch_supported(drvdata->arch) == false) {
		ret = -EINVAL;
		goto err_arch_supported;
		@@ -1517,13 +1547,7 @@ static int etm4_probe(struct amba_device adev, const struct amba_id id)

		err_arch_supported:
		etmdrvdata[drvdata->cpu] = NULL;
		if (--etm4_count == 0) {
		etm4_cpu_pm_unregister();

		cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING);
		if (hp_online)
		cpuhp_remove_state_nocalls(hp_online);
		}
		etm4_pm_clear();
		return ret;
		}

drivers/misc/atmel-ssc.c

+12 −12

Original line number	Diff line number	Diff line
		@@ -10,7 +10,7 @@
		#include <linux/clk.h>
		#include <linux/err.h>
		#include <linux/io.h>
		#include <linux/spinlock.h>
		#include <linux/mutex.h>
		#include <linux/atmel-ssc.h>
		#include <linux/slab.h>
		#include <linux/module.h>
		@@ -20,7 +20,7 @@
		#include "../../sound/soc/atmel/atmel_ssc_dai.h"

		/* Serialize access to ssc_list and user count */
		static DEFINE_SPINLOCK(user_lock);
		static DEFINE_MUTEX(user_lock);
		static LIST_HEAD(ssc_list);

		struct ssc_device *ssc_request(unsigned int ssc_num)
		@@ -28,7 +28,7 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
		int ssc_valid = 0;
		struct ssc_device *ssc;

		spin_lock(&user_lock);
		mutex_lock(&user_lock);
		list_for_each_entry(ssc, &ssc_list, list) {
		if (ssc->pdev->dev.of_node) {
		if (of_alias_get_id(ssc->pdev->dev.of_node, "ssc")
		@@ -44,18 +44,18 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
		}

		if (!ssc_valid) {
		spin_unlock(&user_lock);
		mutex_unlock(&user_lock);
		pr_err("ssc: ssc%d platform device is missing\n", ssc_num);
		return ERR_PTR(-ENODEV);
		}

		if (ssc->user) {
		spin_unlock(&user_lock);
		mutex_unlock(&user_lock);
		dev_dbg(&ssc->pdev->dev, "module busy\n");
		return ERR_PTR(-EBUSY);
		}
		ssc->user++;
		spin_unlock(&user_lock);
		mutex_unlock(&user_lock);

		clk_prepare(ssc->clk);

		@@ -67,14 +67,14 @@ void ssc_free(struct ssc_device *ssc)
		{
		bool disable_clk = true;

		spin_lock(&user_lock);
		mutex_lock(&user_lock);
		if (ssc->user)
		ssc->user--;
		else {
		disable_clk = false;
		dev_dbg(&ssc->pdev->dev, "device already free\n");
		}
		spin_unlock(&user_lock);
		mutex_unlock(&user_lock);

		if (disable_clk)
		clk_unprepare(ssc->clk);
		@@ -237,9 +237,9 @@ static int ssc_probe(struct platform_device *pdev)
		return -ENXIO;
		}

		spin_lock(&user_lock);
		mutex_lock(&user_lock);
		list_add_tail(&ssc->list, &ssc_list);
		spin_unlock(&user_lock);
		mutex_unlock(&user_lock);

		platform_set_drvdata(pdev, ssc);

		@@ -258,9 +258,9 @@ static int ssc_remove(struct platform_device *pdev)

		ssc_sound_dai_remove(ssc);

		spin_lock(&user_lock);
		mutex_lock(&user_lock);
		list_del(&ssc->list);
		spin_unlock(&user_lock);
		mutex_unlock(&user_lock);

		return 0;
		}

drivers/misc/mei/bus.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -745,9 +745,8 @@ static int mei_cl_device_remove(struct device *dev)

		mei_cl_bus_module_put(cldev);
		module_put(THIS_MODULE);
		dev->driver = NULL;
		return ret;

		return ret;
		}

		static ssize_t name_show(struct device dev, struct device_attribute a,