[RESEND PATCH v2 0/2] Introduce multi PM domains helpers

[RESEND PATCH v2 0/2] Introduce multi PM domains helpers

[Daniel Baluta]

From: Daniel Baluta <daniel.baluta@nxp.com>

i.MX8QXP/i.MX8QM has IPs that need multiple power domains to be up
in order to work. In order to help drivers, we introduce multi PM
domains helpers that are able to activate/deactivate multi PM domains.

First patch introduces the helpers and second patch demonstrates how
a driver can use them instead of hardcoding the PM domains handling.

Changes since v1: (addressed Ranjani's comments)
	- enhanced description for dev_multi_pm_attach return value
	- renamed exit_unroll_pm label to exit_detach_pm

Ideally would be to have patch 1/2 merged via power tree and then I
will submit again patch 2/2 on sound tree.

Daniel Baluta (2):
  PM / domains: Introduce multi PM domains helpers
  ASoC: SOF: Use multi PM domains helpers

 drivers/base/power/common.c | 93 +++++++++++++++++++++++++++++++++++++
 include/linux/pm_domain.h   | 19 ++++++++
 sound/soc/sof/imx/imx8.c    | 60 ++++--------------------
 3 files changed, 121 insertions(+), 51 deletions(-)

-- 
2.17.1

[RESEND PATCH v2 1/2] PM / domains: Introduce multi PM domains helpers

[Daniel Baluta]

From: Daniel Baluta <daniel.baluta@nxp.com>

This patch introduces helpers support for multi PM domains.

API consists of:

1) dev_multi_pm_attach - powers up all PM domains associated with a given
device. Because we can attach one PM domain per device, we create
virtual devices (children of initial device) and associate PM domains
one per virtual device.

2) dev_multi_pm_detach - detaches all virtual devices from PM domains
attached with.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 drivers/base/power/common.c | 93 +++++++++++++++++++++++++++++++++++++
 include/linux/pm_domain.h   | 19 ++++++++
 2 files changed, 112 insertions(+)

diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index bbddb267c2e6..6d1f142833b1 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -228,3 +228,96 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd)
 	device_pm_check_callbacks(dev);
 }
 EXPORT_SYMBOL_GPL(dev_pm_domain_set);
+
+/**
+ * dev_multi_pm_attach - power up device associated power domains
+ * @dev: The device used to lookup the PM domains
+ *
+ * Parse device's OF node to find all PM domains specifiers. For each power
+ * domain found, create a virtual device and associate it with the
+ * current power domain.
+ *
+ * This function should typically be invoked by a driver during the
+ * probe phase, in the case its device requires power management through
+ * multiple PM domains.
+ *
+ * Returns a pointer to @dev_multi_pm_domain_data if successfully attached PM
+ * domains, NULL when the device doesn't need a PM domain or when single
+ * power-domains exists for it, else an ERR_PTR() in case of
+ * failures.
+ */
+struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev)
+{
+	struct dev_multi_pm_domain_data *mpd, *retp;
+	int num_domains;
+	int i;
+
+	num_domains = of_count_phandle_with_args(dev->of_node, "power-domains",
+						 "#power-domain-cells");
+	if (num_domains < 2)
+		return NULL;
+
+	mpd = devm_kzalloc(dev, GFP_KERNEL, sizeof(*mpd));
+	if (!mpd)
+		return ERR_PTR(-ENOMEM);
+
+	mpd->dev = dev;
+	mpd->num_domains = num_domains;
+
+	mpd->virt_devs = devm_kmalloc_array(dev, mpd->num_domains,
+					    sizeof(*mpd->virt_devs),
+					    GFP_KERNEL);
+	if (!mpd->virt_devs)
+		return ERR_PTR(-ENOMEM);
+
+	mpd->links = devm_kmalloc_array(dev, mpd->num_domains,
+					sizeof(*mpd->links), GFP_KERNEL);
+	if (!mpd->links)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < mpd->num_domains; i++) {
+		mpd->virt_devs[i] = dev_pm_domain_attach_by_id(dev, i);
+		if (IS_ERR(mpd->virt_devs[i])) {
+			retp = (struct dev_multi_pm_domain_data *)
+				mpd->virt_devs[i];
+			goto exit_unroll_pm;
+		}
+		mpd->links[i] = device_link_add(dev, mpd->virt_devs[i],
+						DL_FLAG_STATELESS |
+						DL_FLAG_PM_RUNTIME |
+						DL_FLAG_RPM_ACTIVE);
+		if (!mpd->links[i]) {
+			retp = ERR_PTR(-ENOMEM);
+			dev_pm_domain_detach(mpd->virt_devs[i], false);
+			goto exit_unroll_pm;
+		}
+	}
+	return mpd;
+
+exit_unroll_pm:
+	while (--i >= 0) {
+		device_link_del(mpd->links[i]);
+		dev_pm_domain_detach(mpd->virt_devs[i], false);
+	}
+
+	return retp;
+}
+EXPORT_SYMBOL(dev_multi_pm_attach);
+
+/**
+ * dev_multi_pm_detach - Detach a device from its PM domains.
+ * Each multi power domain is attached to a virtual children device
+ *
+ * @mpd: multi power domains data, contains the association between
+ * virtul device and PM domain
+ */
+void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd)
+{
+	int i;
+
+	for (i = 0; i < mpd->num_domains; i++) {
+		device_link_del(mpd->links[i]);
+		dev_pm_domain_detach(mpd->virt_devs[i], false);
+	}
+}
+EXPORT_SYMBOL(dev_multi_pm_detach);
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 9ec78ee53652..5bcb35150af2 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -183,6 +183,13 @@ struct generic_pm_domain_data {
 	void *data;
 };
 
+struct dev_multi_pm_domain_data {
+	struct device *dev; /* parent device */
+	struct device **virt_devs; /* virtual children links */
+	struct device_link **links; /*  links parent <-> virtual children */
+	int num_domains;
+};
+
 #ifdef CONFIG_PM_GENERIC_DOMAINS
 static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
 {
@@ -369,18 +376,27 @@ struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
 
 #ifdef CONFIG_PM
 int dev_pm_domain_attach(struct device *dev, bool power_on);
+struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev);
 struct device *dev_pm_domain_attach_by_id(struct device *dev,
 					  unsigned int index);
 struct device *dev_pm_domain_attach_by_name(struct device *dev,
 					    const char *name);
 void dev_pm_domain_detach(struct device *dev, bool power_off);
 int dev_pm_domain_start(struct device *dev);
+void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd);
 void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
+
 #else
 static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
 {
 	return 0;
 }
+
+struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev)
+{
+	return NULL;
+}
+
 static inline struct device *dev_pm_domain_attach_by_id(struct device *dev,
 							unsigned int index)
 {
@@ -396,6 +412,9 @@ static inline int dev_pm_domain_start(struct device *dev)
 {
 	return 0;
 }
+
+void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd) {}
+
 static inline void dev_pm_domain_set(struct device *dev,
 				     struct dev_pm_domain *pd) {}
 #endif
-- 
2.17.1

[RESEND PATCH v2 2/2] ASoC: SOF: Use multi PM domains helpers

[Daniel Baluta]

From: Daniel Baluta <daniel.baluta@nxp.com>

Use dev_multi_pm_attach / dev_multi_pm_detach instead of the hardcoded
version.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 sound/soc/sof/imx/imx8.c | 60 ++++++----------------------------------
 1 file changed, 9 insertions(+), 51 deletions(-)

diff --git a/sound/soc/sof/imx/imx8.c b/sound/soc/sof/imx/imx8.c
index b692752b2178..2e7635b697cf 100644
--- a/sound/soc/sof/imx/imx8.c
+++ b/sound/soc/sof/imx/imx8.c
@@ -51,10 +51,7 @@ struct imx8_priv {
 	struct imx_sc_ipc *sc_ipc;
 
 	/* Power domain handling */
-	int num_domains;
-	struct device **pd_dev;
-	struct device_link **link;
-
+	struct dev_multi_pm_domain_data *mpd;
 };
 
 static void imx8_get_reply(struct snd_sof_dev *sdev)
@@ -207,7 +204,6 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 	struct resource res;
 	u32 base, size;
 	int ret = 0;
-	int i;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -218,45 +214,15 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 	priv->sdev = sdev;
 
 	/* power up device associated power domains */
-	priv->num_domains = of_count_phandle_with_args(np, "power-domains",
-						       "#power-domain-cells");
-	if (priv->num_domains < 0) {
-		dev_err(sdev->dev, "no power-domains property in %pOF\n", np);
-		return priv->num_domains;
-	}
-
-	priv->pd_dev = devm_kmalloc_array(&pdev->dev, priv->num_domains,
-					  sizeof(*priv->pd_dev), GFP_KERNEL);
-	if (!priv->pd_dev)
-		return -ENOMEM;
-
-	priv->link = devm_kmalloc_array(&pdev->dev, priv->num_domains,
-					sizeof(*priv->link), GFP_KERNEL);
-	if (!priv->link)
-		return -ENOMEM;
-
-	for (i = 0; i < priv->num_domains; i++) {
-		priv->pd_dev[i] = dev_pm_domain_attach_by_id(&pdev->dev, i);
-		if (IS_ERR(priv->pd_dev[i])) {
-			ret = PTR_ERR(priv->pd_dev[i]);
-			goto exit_unroll_pm;
-		}
-		priv->link[i] = device_link_add(&pdev->dev, priv->pd_dev[i],
-						DL_FLAG_STATELESS |
-						DL_FLAG_PM_RUNTIME |
-						DL_FLAG_RPM_ACTIVE);
-		if (!priv->link[i]) {
-			ret = -ENOMEM;
-			dev_pm_domain_detach(priv->pd_dev[i], false);
-			goto exit_unroll_pm;
-		}
-	}
+	priv->mpd = dev_multi_pm_attach(&pdev->dev);
+	if (IS_ERR(priv->mpd))
+		return PTR_ERR(priv->mpd);
 
 	ret = imx_scu_get_handle(&priv->sc_ipc);
 	if (ret) {
 		dev_err(sdev->dev, "Cannot obtain SCU handle (err = %d)\n",
 			ret);
-		goto exit_unroll_pm;
+		goto exit_detach_pm;
 	}
 
 	priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
@@ -264,7 +230,7 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 						      pdev, sizeof(*pdev));
 	if (IS_ERR(priv->ipc_dev)) {
 		ret = PTR_ERR(priv->ipc_dev);
-		goto exit_unroll_pm;
+		goto exit_detach_pm;
 	}
 
 	priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
@@ -328,26 +294,18 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 
 exit_pdev_unregister:
 	platform_device_unregister(priv->ipc_dev);
-exit_unroll_pm:
-	while (--i >= 0) {
-		device_link_del(priv->link[i]);
-		dev_pm_domain_detach(priv->pd_dev[i], false);
-	}
-
+exit_detach_pm:
+	dev_multi_pm_detach(priv->mpd);
 	return ret;
 }
 
 static int imx8_remove(struct snd_sof_dev *sdev)
 {
 	struct imx8_priv *priv = (struct imx8_priv *)sdev->private;
-	int i;
 
 	platform_device_unregister(priv->ipc_dev);
 
-	for (i = 0; i < priv->num_domains; i++) {
-		device_link_del(priv->link[i]);
-		dev_pm_domain_detach(priv->pd_dev[i], false);
-	}
+	dev_multi_pm_detach(priv->mpd);
 
 	return 0;
 }
-- 
2.17.1

Re: [RESEND PATCH v2 1/2] PM / domains: Introduce multi PM domains helpers

[kernel test robot]

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Hi Daniel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pm/linux-next]
[also build test WARNING on shawnguo/for-next linux/master linus/master v5.8-rc2 next-20200623]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Baluta/Introduce-multi-PM-domains-helpers/20200623-193706
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: i386-tinyconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/base/platform.c:23:
>> include/linux/pm_domain.h:395:34: warning: no previous prototype for 'dev_multi_pm_attach' [-Wmissing-prototypes]
     395 | struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev)
         |                                  ^~~~~~~~~~~~~~~~~~~
>> include/linux/pm_domain.h:416:6: warning: no previous prototype for 'dev_multi_pm_detach' [-Wmissing-prototypes]
     416 | void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd) {}
         |      ^~~~~~~~~~~~~~~~~~~
   drivers/base/platform.c:1352:20: warning: no previous prototype for 'early_platform_cleanup' [-Wmissing-prototypes]
    1352 | void __weak __init early_platform_cleanup(void) { }
         |                    ^~~~~~~~~~~~~~~~~~~~~~

vim +/dev_multi_pm_attach +395 include/linux/pm_domain.h

   394	
 > 395	struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev)
   396	{
   397		return NULL;
   398	}
   399	
   400	static inline struct device *dev_pm_domain_attach_by_id(struct device *dev,
   401								unsigned int index)
   402	{
   403		return NULL;
   404	}
   405	static inline struct device *dev_pm_domain_attach_by_name(struct device *dev,
   406								  const char *name)
   407	{
   408		return NULL;
   409	}
   410	static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
   411	static inline int dev_pm_domain_start(struct device *dev)
   412	{
   413		return 0;
   414	}
   415	
 > 416	void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd) {}
   417	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
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Re: [RESEND PATCH v2 1/2] PM / domains: Introduce multi PM domains helpers

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 2160 bytes --]

Hi Daniel,

I love your patch! Yet something to improve:

[auto build test ERROR on pm/linux-next]
[also build test ERROR on shawnguo/for-next linux/master linus/master v5.8-rc2 next-20200623]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Baluta/Introduce-multi-PM-domains-helpers/20200623-193706
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: mips-omega2p_defconfig (attached as .config)
compiler: mipsel-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mipsel-linux-ld: drivers/base/power/clock_ops.o: in function `dev_multi_pm_attach':
>> clock_ops.c:(.text+0x16c): multiple definition of `dev_multi_pm_attach'; drivers/base/platform.o:platform.c:(.text+0x3ec): first defined here
   mipsel-linux-ld: drivers/base/power/clock_ops.o: in function `dev_multi_pm_detach':
>> clock_ops.c:(.text+0x174): multiple definition of `dev_multi_pm_detach'; drivers/base/platform.o:platform.c:(.text+0x3f4): first defined here
   mipsel-linux-ld: drivers/mmc/core/sdio_bus.o: in function `dev_multi_pm_attach':
   sdio_bus.c:(.text+0x388): multiple definition of `dev_multi_pm_attach'; drivers/base/platform.o:platform.c:(.text+0x3ec): first defined here
   mipsel-linux-ld: drivers/mmc/core/sdio_bus.o: in function `dev_multi_pm_detach':
   sdio_bus.c:(.text+0x390): multiple definition of `dev_multi_pm_detach'; drivers/base/platform.o:platform.c:(.text+0x3f4): first defined here

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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Re: [RESEND PATCH v2 1/2] PM / domains: Introduce multi PM domains helpers

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 4548 bytes --]

Hi Daniel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pm/linux-next]
[also build test WARNING on shawnguo/for-next linux/master linus/master v5.8-rc2 next-20200623]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Baluta/Introduce-multi-PM-domains-helpers/20200623-193706
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: i386-randconfig-s001-20200623 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=i386 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/base/power/common.c:260:33: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected unsigned int [usertype] size @@     got restricted gfp_t @@
>> drivers/base/power/common.c:260:33: sparse:     expected unsigned int [usertype] size
>> drivers/base/power/common.c:260:33: sparse:     got restricted gfp_t
>> drivers/base/power/common.c:260:45: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected restricted gfp_t [usertype] gfp @@     got unsigned int @@
>> drivers/base/power/common.c:260:45: sparse:     expected restricted gfp_t [usertype] gfp
>> drivers/base/power/common.c:260:45: sparse:     got unsigned int

vim +260 drivers/base/power/common.c

   231	
   232	/**
   233	 * dev_multi_pm_attach - power up device associated power domains
   234	 * @dev: The device used to lookup the PM domains
   235	 *
   236	 * Parse device's OF node to find all PM domains specifiers. For each power
   237	 * domain found, create a virtual device and associate it with the
   238	 * current power domain.
   239	 *
   240	 * This function should typically be invoked by a driver during the
   241	 * probe phase, in the case its device requires power management through
   242	 * multiple PM domains.
   243	 *
   244	 * Returns a pointer to @dev_multi_pm_domain_data if successfully attached PM
   245	 * domains, NULL when the device doesn't need a PM domain or when single
   246	 * power-domains exists for it, else an ERR_PTR() in case of
   247	 * failures.
   248	 */
   249	struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev)
   250	{
   251		struct dev_multi_pm_domain_data *mpd, *retp;
   252		int num_domains;
   253		int i;
   254	
   255		num_domains = of_count_phandle_with_args(dev->of_node, "power-domains",
   256							 "#power-domain-cells");
   257		if (num_domains < 2)
   258			return NULL;
   259	
 > 260		mpd = devm_kzalloc(dev, GFP_KERNEL, sizeof(*mpd));
   261		if (!mpd)
   262			return ERR_PTR(-ENOMEM);
   263	
   264		mpd->dev = dev;
   265		mpd->num_domains = num_domains;
   266	
   267		mpd->virt_devs = devm_kmalloc_array(dev, mpd->num_domains,
   268						    sizeof(*mpd->virt_devs),
   269						    GFP_KERNEL);
   270		if (!mpd->virt_devs)
   271			return ERR_PTR(-ENOMEM);
   272	
   273		mpd->links = devm_kmalloc_array(dev, mpd->num_domains,
   274						sizeof(*mpd->links), GFP_KERNEL);
   275		if (!mpd->links)
   276			return ERR_PTR(-ENOMEM);
   277	
   278		for (i = 0; i < mpd->num_domains; i++) {
   279			mpd->virt_devs[i] = dev_pm_domain_attach_by_id(dev, i);
   280			if (IS_ERR(mpd->virt_devs[i])) {
   281				retp = (struct dev_multi_pm_domain_data *)
   282					mpd->virt_devs[i];
   283				goto exit_unroll_pm;
   284			}
   285			mpd->links[i] = device_link_add(dev, mpd->virt_devs[i],
   286							DL_FLAG_STATELESS |
   287							DL_FLAG_PM_RUNTIME |
   288							DL_FLAG_RPM_ACTIVE);
   289			if (!mpd->links[i]) {
   290				retp = ERR_PTR(-ENOMEM);
   291				dev_pm_domain_detach(mpd->virt_devs[i], false);
   292				goto exit_unroll_pm;
   293			}
   294		}
   295		return mpd;
   296	
   297	exit_unroll_pm:
   298		while (--i >= 0) {
   299			device_link_del(mpd->links[i]);
   300			dev_pm_domain_detach(mpd->virt_devs[i], false);
   301		}
   302	
   303		return retp;
   304	}
   305	EXPORT_SYMBOL(dev_multi_pm_attach);
   306	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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Re: [RESEND PATCH v2 1/2] PM / domains: Introduce multi PM domains helpers

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 4556 bytes --]

Hi Daniel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pm/linux-next]
[also build test WARNING on shawnguo/for-next linux/master linus/master v5.8-rc2 next-20200623]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Baluta/Introduce-multi-PM-domains-helpers/20200623-193706
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-s022-20200623 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/base/power/common.c:260:33: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected unsigned long [usertype] size @@     got restricted gfp_t @@
>> drivers/base/power/common.c:260:33: sparse:     expected unsigned long [usertype] size
   drivers/base/power/common.c:260:33: sparse:     got restricted gfp_t
>> drivers/base/power/common.c:260:45: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected restricted gfp_t [usertype] gfp @@     got unsigned long @@
   drivers/base/power/common.c:260:45: sparse:     expected restricted gfp_t [usertype] gfp
>> drivers/base/power/common.c:260:45: sparse:     got unsigned long

vim +260 drivers/base/power/common.c

   231	
   232	/**
   233	 * dev_multi_pm_attach - power up device associated power domains
   234	 * @dev: The device used to lookup the PM domains
   235	 *
   236	 * Parse device's OF node to find all PM domains specifiers. For each power
   237	 * domain found, create a virtual device and associate it with the
   238	 * current power domain.
   239	 *
   240	 * This function should typically be invoked by a driver during the
   241	 * probe phase, in the case its device requires power management through
   242	 * multiple PM domains.
   243	 *
   244	 * Returns a pointer to @dev_multi_pm_domain_data if successfully attached PM
   245	 * domains, NULL when the device doesn't need a PM domain or when single
   246	 * power-domains exists for it, else an ERR_PTR() in case of
   247	 * failures.
   248	 */
   249	struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev)
   250	{
   251		struct dev_multi_pm_domain_data *mpd, *retp;
   252		int num_domains;
   253		int i;
   254	
   255		num_domains = of_count_phandle_with_args(dev->of_node, "power-domains",
   256							 "#power-domain-cells");
   257		if (num_domains < 2)
   258			return NULL;
   259	
 > 260		mpd = devm_kzalloc(dev, GFP_KERNEL, sizeof(*mpd));
   261		if (!mpd)
   262			return ERR_PTR(-ENOMEM);
   263	
   264		mpd->dev = dev;
   265		mpd->num_domains = num_domains;
   266	
   267		mpd->virt_devs = devm_kmalloc_array(dev, mpd->num_domains,
   268						    sizeof(*mpd->virt_devs),
   269						    GFP_KERNEL);
   270		if (!mpd->virt_devs)
   271			return ERR_PTR(-ENOMEM);
   272	
   273		mpd->links = devm_kmalloc_array(dev, mpd->num_domains,
   274						sizeof(*mpd->links), GFP_KERNEL);
   275		if (!mpd->links)
   276			return ERR_PTR(-ENOMEM);
   277	
   278		for (i = 0; i < mpd->num_domains; i++) {
   279			mpd->virt_devs[i] = dev_pm_domain_attach_by_id(dev, i);
   280			if (IS_ERR(mpd->virt_devs[i])) {
   281				retp = (struct dev_multi_pm_domain_data *)
   282					mpd->virt_devs[i];
   283				goto exit_unroll_pm;
   284			}
   285			mpd->links[i] = device_link_add(dev, mpd->virt_devs[i],
   286							DL_FLAG_STATELESS |
   287							DL_FLAG_PM_RUNTIME |
   288							DL_FLAG_RPM_ACTIVE);
   289			if (!mpd->links[i]) {
   290				retp = ERR_PTR(-ENOMEM);
   291				dev_pm_domain_detach(mpd->virt_devs[i], false);
   292				goto exit_unroll_pm;
   293			}
   294		}
   295		return mpd;
   296	
   297	exit_unroll_pm:
   298		while (--i >= 0) {
   299			device_link_del(mpd->links[i]);
   300			dev_pm_domain_detach(mpd->virt_devs[i], false);
   301		}
   302	
   303		return retp;
   304	}
   305	EXPORT_SYMBOL(dev_multi_pm_attach);
   306	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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