Patchwork [v2,part,1,6/9] ACPI, pci_root: use acpi_handle_print() and pr_xxx() to print messages

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Submitter Jiang Liu
Date May 13, 2013, 4:08 p.m.
Message ID <1368461313-4371-7-git-send-email-jiang.liu@huawei.com>
Download mbox | patch
Permalink /patch/243434/
State Superseded
Headers show

Comments

Jiang Liu - May 13, 2013, 4:08 p.m.
Use acpi_handle_print() and pr_xxx() to print messages in pci_root.c.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: linux-acpi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/acpi/pci_root.c | 71 ++++++++++++++++++++++---------------------------
 1 file changed, 32 insertions(+), 39 deletions(-)
Rafael J. Wysocki - May 13, 2013, 11:27 p.m.
On Tuesday, May 14, 2013 12:08:30 AM Jiang Liu wrote:
> Use acpi_handle_print() and pr_xxx() to print messages in pci_root.c.
> 
> Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
> Cc: Len Brown <lenb@kernel.org>
> Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
> Cc: linux-acpi@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  drivers/acpi/pci_root.c | 71 ++++++++++++++++++++++---------------------------
>  1 file changed, 32 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
> index 91ddfd6..9ced5c3 100644
> --- a/drivers/acpi/pci_root.c
> +++ b/drivers/acpi/pci_root.c
> @@ -379,23 +379,23 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  	struct acpi_pci_root *root;
>  	u32 flags, base_flags;
>  	bool is_osc_granted = false;
> +	acpi_handle hdl = device->handle;

The usual way is to call it 'handle'.  Any reason why not to do it here too?

>  	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
>  	if (!root)
>  		return -ENOMEM;
>  
>  	segment = 0;
> -	status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
> -				       &segment);
> +	status = acpi_evaluate_integer(hdl, METHOD_NAME__SEG, NULL, &segment);
>  	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
> -		printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
> +		acpi_handle_err(hdl, "can't evaluate _SEG\n");
>  		result = -ENODEV;
>  		goto end;
>  	}
>  
>  	/* Check _CRS first, then _BBN.  If no _BBN, default to zero. */
>  	root->secondary.flags = IORESOURCE_BUS;
> -	status = try_get_root_bridge_busnr(device->handle, &root->secondary);
> +	status = try_get_root_bridge_busnr(hdl, &root->secondary);
>  	if (ACPI_FAILURE(status)) {
>  		/*
>  		 * We need both the start and end of the downstream bus range
> @@ -404,16 +404,16 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  		 * can do is assume [_BBN-0xFF] or [0-0xFF].
>  		 */
>  		root->secondary.end = 0xFF;
> -		printk(KERN_WARNING FW_BUG PREFIX
> -		       "no secondary bus range in _CRS\n");
> -		status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
> +		acpi_handle_warn(hdl,
> +				 FW_BUG "no secondary bus range in _CRS\n");
> +		status = acpi_evaluate_integer(hdl, METHOD_NAME__BBN,
>  					       NULL, &bus);
>  		if (ACPI_SUCCESS(status))
>  			root->secondary.start = bus;
>  		else if (status == AE_NOT_FOUND)
>  			root->secondary.start = 0;
>  		else {
> -			printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
> +			acpi_handle_err(hdl, "can't evaluate _BBN\n");
>  			result = -ENODEV;
>  			goto end;
>  		}
> @@ -425,11 +425,11 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  	strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
>  	device->driver_data = root;
>  
> -	printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
> +	pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
>  	       acpi_device_name(device), acpi_device_bid(device),
>  	       root->segment, &root->secondary);
>  
> -	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
> +	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(hdl);
>  
>  	/*
>  	 * All supported architectures that use ACPI have support for
> @@ -473,7 +473,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  		dev_info(&device->dev,
>  			"Requesting ACPI _OSC control (0x%02x)\n", flags);
>  
> -		status = acpi_pci_osc_control_set(device->handle, &flags,
> +		status = acpi_pci_osc_control_set(hdl, &flags,
>  				       OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
>  		if (ACPI_SUCCESS(status)) {
>  			is_osc_granted = true;
> @@ -505,9 +505,9 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  	 */
>  	root->bus = pci_acpi_scan_root(root);
>  	if (!root->bus) {
> -		printk(KERN_ERR PREFIX
> -			    "Bus %04x:%02x not present in PCI namespace\n",
> -			    root->segment, (unsigned int)root->secondary.start);
> +		acpi_handle_err(hdl,
> +			"Bus %04x:%02x not present in PCI namespace\n",
> +			root->segment, (unsigned int)root->secondary.start);
>  		result = -ENODEV;
>  		goto end;
>  	}
> @@ -517,8 +517,8 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  		if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
>  			pcie_clear_aspm(root->bus);
>  	} else {
> -		pr_info("ACPI _OSC control for PCIe not granted, "
> -			"disabling ASPM\n");
> +		acpi_handle_info(hdl,
> +			"ACPI _OSC control for PCIe not granted, disabling ASPM\n");
>  		pcie_no_aspm();
>  	}
>  
> @@ -571,12 +571,13 @@ static void handle_root_bridge_insertion(acpi_handle handle)
>  	struct acpi_device *device;
>  
>  	if (!acpi_bus_get_device(handle, &device)) {
> -		printk(KERN_DEBUG "acpi device exists...\n");
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "acpi device exists...\n");

Do we have acpi_handle_dbg()?  If so, why don't you use it here? (And below.)
If not, why don't you add it and use it here (and below)?

>  		return;
>  	}
>  
>  	if (acpi_bus_scan(handle))
> -		printk(KERN_ERR "cannot add bridge to acpi list\n");
> +		acpi_handle_err(handle, "cannot add bridge to acpi list\n");
>  }
>  
>  static void handle_root_bridge_removal(struct acpi_device *device)
> @@ -602,7 +603,6 @@ static void handle_root_bridge_removal(struct acpi_device *device)
>  static void _handle_hotplug_event_root(struct work_struct *work)
>  {
>  	struct acpi_pci_root *root;
> -	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER };
>  	struct acpi_hp_work *hp_work;
>  	acpi_handle handle;
>  	u32 type;
> @@ -613,13 +613,11 @@ static void _handle_hotplug_event_root(struct work_struct *work)
>  
>  	root = acpi_pci_find_root(handle);
>  
> -	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
> -
>  	switch (type) {
>  	case ACPI_NOTIFY_BUS_CHECK:
>  		/* bus enumerate */
> -		printk(KERN_DEBUG "%s: Bus check notify on %s\n", __func__,
> -				 (char *)buffer.pointer);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "Bus check notify on %s\n", __func__);
>  		if (!root)
>  			handle_root_bridge_insertion(handle);
>  
> @@ -627,27 +625,26 @@ static void _handle_hotplug_event_root(struct work_struct *work)
>  
>  	case ACPI_NOTIFY_DEVICE_CHECK:
>  		/* device check */
> -		printk(KERN_DEBUG "%s: Device check notify on %s\n", __func__,
> -				 (char *)buffer.pointer);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "Device check notify on %s\n", __func__);
>  		if (!root)
>  			handle_root_bridge_insertion(handle);
>  		break;
>  
>  	case ACPI_NOTIFY_EJECT_REQUEST:
>  		/* request device eject */
> -		printk(KERN_DEBUG "%s: Device eject notify on %s\n", __func__,
> -				 (char *)buffer.pointer);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "Device eject notify on %s\n", __func__);
>  		if (root)
>  			handle_root_bridge_removal(root->device);
>  		break;
>  	default:
> -		printk(KERN_WARNING "notify_handler: unknown event type 0x%x for %s\n",
> -				 type, (char *)buffer.pointer);
> +		acpi_handle_warn(handle,
> +			 "notify_handler: unknown event type 0x%xn", type);
>  		break;
>  	}
>  
>  	kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
> -	kfree(buffer.pointer);
>  }
>  
>  static void handle_hotplug_event_root(acpi_handle handle, u32 type,
> @@ -661,9 +658,6 @@ static acpi_status __init
>  find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
>  {
>  	acpi_status status;
> -	char objname[64];
> -	struct acpi_buffer buffer = { .length = sizeof(objname),
> -				      .pointer = objname };
>  	int *count = (int *)context;
>  
>  	if (!acpi_is_root_bridge(handle))
> @@ -671,16 +665,15 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
>  
>  	(*count)++;
>  
> -	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
> -
>  	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
>  					handle_hotplug_event_root, NULL);
>  	if (ACPI_FAILURE(status))
> -		printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n",
> -				  objname, (unsigned int)status);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +			"notify handler is not installed, exit status: %u\n",
> +			 (unsigned int)status);
>  	else
> -		printk(KERN_DEBUG "acpi root: %s notify handler is installed\n",
> -				 objname);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "notify handler is installed\n");
>  
>  	return AE_OK;
>  }

Thanks,
Rafael
Gu Zheng - May 14, 2013, 8:43 a.m.
On 05/14/2013 12:08 AM, Jiang Liu wrote:

> Use acpi_handle_print() and pr_xxx() to print messages in pci_root.c.
> 
> Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
> Cc: Len Brown <lenb@kernel.org>
> Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
> Cc: linux-acpi@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  drivers/acpi/pci_root.c | 71 ++++++++++++++++++++++---------------------------
>  1 file changed, 32 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
> index 91ddfd6..9ced5c3 100644
> --- a/drivers/acpi/pci_root.c
> +++ b/drivers/acpi/pci_root.c
> @@ -379,23 +379,23 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  	struct acpi_pci_root *root;
>  	u32 flags, base_flags;
>  	bool is_osc_granted = false;
> +	acpi_handle hdl = device->handle;
>  
>  	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
>  	if (!root)
>  		return -ENOMEM;
>  
>  	segment = 0;
> -	status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
> -				       &segment);
> +	status = acpi_evaluate_integer(hdl, METHOD_NAME__SEG, NULL, &segment);
>  	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
> -		printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
> +		acpi_handle_err(hdl, "can't evaluate _SEG\n");
>  		result = -ENODEV;
>  		goto end;
>  	}
>  
>  	/* Check _CRS first, then _BBN.  If no _BBN, default to zero. */
>  	root->secondary.flags = IORESOURCE_BUS;
> -	status = try_get_root_bridge_busnr(device->handle, &root->secondary);
> +	status = try_get_root_bridge_busnr(hdl, &root->secondary);
>  	if (ACPI_FAILURE(status)) {
>  		/*
>  		 * We need both the start and end of the downstream bus range
> @@ -404,16 +404,16 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  		 * can do is assume [_BBN-0xFF] or [0-0xFF].
>  		 */
>  		root->secondary.end = 0xFF;
> -		printk(KERN_WARNING FW_BUG PREFIX
> -		       "no secondary bus range in _CRS\n");
> -		status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
> +		acpi_handle_warn(hdl,
> +				 FW_BUG "no secondary bus range in _CRS\n");
> +		status = acpi_evaluate_integer(hdl, METHOD_NAME__BBN,
>  					       NULL, &bus);
>  		if (ACPI_SUCCESS(status))
>  			root->secondary.start = bus;
>  		else if (status == AE_NOT_FOUND)
>  			root->secondary.start = 0;
>  		else {
> -			printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
> +			acpi_handle_err(hdl, "can't evaluate _BBN\n");
>  			result = -ENODEV;
>  			goto end;
>  		}
> @@ -425,11 +425,11 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  	strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
>  	device->driver_data = root;
>  
> -	printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
> +	pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
>  	       acpi_device_name(device), acpi_device_bid(device),
>  	       root->segment, &root->secondary);
>  
> -	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
> +	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(hdl);
>  
>  	/*
>  	 * All supported architectures that use ACPI have support for
> @@ -473,7 +473,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  		dev_info(&device->dev,
>  			"Requesting ACPI _OSC control (0x%02x)\n", flags);
>  
> -		status = acpi_pci_osc_control_set(device->handle, &flags,
> +		status = acpi_pci_osc_control_set(hdl, &flags,
>  				       OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
>  		if (ACPI_SUCCESS(status)) {
>  			is_osc_granted = true;
> @@ -505,9 +505,9 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  	 */
>  	root->bus = pci_acpi_scan_root(root);
>  	if (!root->bus) {
> -		printk(KERN_ERR PREFIX
> -			    "Bus %04x:%02x not present in PCI namespace\n",
> -			    root->segment, (unsigned int)root->secondary.start);
> +		acpi_handle_err(hdl,
> +			"Bus %04x:%02x not present in PCI namespace\n",
> +			root->segment, (unsigned int)root->secondary.start);
>  		result = -ENODEV;
>  		goto end;
>  	}
> @@ -517,8 +517,8 @@ static int acpi_pci_root_add(struct acpi_device *device,
>  		if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
>  			pcie_clear_aspm(root->bus);
>  	} else {
> -		pr_info("ACPI _OSC control for PCIe not granted, "
> -			"disabling ASPM\n");
> +		acpi_handle_info(hdl,
> +			"ACPI _OSC control for PCIe not granted, disabling ASPM\n");
>  		pcie_no_aspm();
>  	}
>  
> @@ -571,12 +571,13 @@ static void handle_root_bridge_insertion(acpi_handle handle)
>  	struct acpi_device *device;
>  
>  	if (!acpi_bus_get_device(handle, &device)) {
> -		printk(KERN_DEBUG "acpi device exists...\n");
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "acpi device exists...\n");
>  		return;
>  	}
>  
>  	if (acpi_bus_scan(handle))
> -		printk(KERN_ERR "cannot add bridge to acpi list\n");
> +		acpi_handle_err(handle, "cannot add bridge to acpi list\n");
>  }
>  
>  static void handle_root_bridge_removal(struct acpi_device *device)
> @@ -602,7 +603,6 @@ static void handle_root_bridge_removal(struct acpi_device *device)
>  static void _handle_hotplug_event_root(struct work_struct *work)
>  {
>  	struct acpi_pci_root *root;
> -	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER };
>  	struct acpi_hp_work *hp_work;
>  	acpi_handle handle;
>  	u32 type;
> @@ -613,13 +613,11 @@ static void _handle_hotplug_event_root(struct work_struct *work)
>  
>  	root = acpi_pci_find_root(handle);
>  
> -	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
> -
>  	switch (type) {
>  	case ACPI_NOTIFY_BUS_CHECK:
>  		/* bus enumerate */
> -		printk(KERN_DEBUG "%s: Bus check notify on %s\n", __func__,
> -				 (char *)buffer.pointer);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "Bus check notify on %s\n", __func__);
>  		if (!root)
>  			handle_root_bridge_insertion(handle);
>  
> @@ -627,27 +625,26 @@ static void _handle_hotplug_event_root(struct work_struct *work)
>  
>  	case ACPI_NOTIFY_DEVICE_CHECK:
>  		/* device check */
> -		printk(KERN_DEBUG "%s: Device check notify on %s\n", __func__,
> -				 (char *)buffer.pointer);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "Device check notify on %s\n", __func__);
>  		if (!root)
>  			handle_root_bridge_insertion(handle);
>  		break;
>  
>  	case ACPI_NOTIFY_EJECT_REQUEST:
>  		/* request device eject */
> -		printk(KERN_DEBUG "%s: Device eject notify on %s\n", __func__,
> -				 (char *)buffer.pointer);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "Device eject notify on %s\n", __func__);
>  		if (root)
>  			handle_root_bridge_removal(root->device);
>  		break;
>  	default:
> -		printk(KERN_WARNING "notify_handler: unknown event type 0x%x for %s\n",
> -				 type, (char *)buffer.pointer);
> +		acpi_handle_warn(handle,
> +			 "notify_handler: unknown event type 0x%xn", type);

Here may be "0x%x\n".

A better way I think is that we can change the format string of printk in acpi_handle_printk()
from "%sACPI: %s: %pV"  to "%sACPI: %s: %pV \n", so that there is no need to append the '\n' in the
format string when we call acpi_handle_printk().

Thanks,
Gu
 

>  		break;
>  	}
>  
>  	kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
> -	kfree(buffer.pointer);
>  }
>  
>  static void handle_hotplug_event_root(acpi_handle handle, u32 type,
> @@ -661,9 +658,6 @@ static acpi_status __init
>  find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
>  {
>  	acpi_status status;
> -	char objname[64];
> -	struct acpi_buffer buffer = { .length = sizeof(objname),
> -				      .pointer = objname };
>  	int *count = (int *)context;
>  
>  	if (!acpi_is_root_bridge(handle))
> @@ -671,16 +665,15 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
>  
>  	(*count)++;
>  
> -	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
> -
>  	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
>  					handle_hotplug_event_root, NULL);
>  	if (ACPI_FAILURE(status))
> -		printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n",
> -				  objname, (unsigned int)status);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +			"notify handler is not installed, exit status: %u\n",
> +			 (unsigned int)status);
>  	else
> -		printk(KERN_DEBUG "acpi root: %s notify handler is installed\n",
> -				 objname);
> +		acpi_handle_printk(KERN_DEBUG, handle,
> +				   "notify handler is installed\n");
>  
>  	return AE_OK;
>  }


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Jiang Liu - May 14, 2013, 12:46 p.m.
On 05/14/2013 07:27 AM, Rafael J. Wysocki wrote:
> On Tuesday, May 14, 2013 12:08:30 AM Jiang Liu wrote:
>> Use acpi_handle_print() and pr_xxx() to print messages in pci_root.c.
>>
>> Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
>> Cc: Len Brown <lenb@kernel.org>
>> Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
>> Cc: linux-acpi@vger.kernel.org
>> Cc: linux-kernel@vger.kernel.org
>> ---
>>   drivers/acpi/pci_root.c | 71 ++++++++++++++++++++++---------------------------
>>   1 file changed, 32 insertions(+), 39 deletions(-)
>>
>> diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
>> index 91ddfd6..9ced5c3 100644
>> --- a/drivers/acpi/pci_root.c
>> +++ b/drivers/acpi/pci_root.c
>> @@ -379,23 +379,23 @@ static int acpi_pci_root_add(struct acpi_device *device,
>>   	struct acpi_pci_root *root;
>>   	u32 flags, base_flags;
>>   	bool is_osc_granted = false;
>> +	acpi_handle hdl = device->handle;
> The usual way is to call it 'handle'.  Any reason why not to do it here
Hi Rafael,
     Just to avoid splitting some code into two lines, I could to use 
"handle"
if preferred.
>>   	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
>>   	if (!root)
>>   		return -ENOMEM;
>>   
>>   	segment = 0;
>> -	status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
>> -				       &segment);
>> +	status = acpi_evaluate_integer(hdl, METHOD_NAME__SEG, NULL, &segment);
>>   	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
>> -		printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
>> +		acpi_handle_err(hdl, "can't evaluate _SEG\n");
>>   		result = -ENODEV;
>>   		goto end;
>>   	}
>>   
>>   	/* Check _CRS first, then _BBN.  If no _BBN, default to zero. */
>>   	root->secondary.flags = IORESOURCE_BUS;
>> -	status = try_get_root_bridge_busnr(device->handle, &root->secondary);
>> +	status = try_get_root_bridge_busnr(hdl, &root->secondary);
>>   	if (ACPI_FAILURE(status)) {
>>   		/*
>>   		 * We need both the start and end of the downstream bus range
>> @@ -404,16 +404,16 @@ static int acpi_pci_root_add(struct acpi_device *device,
>>   		 * can do is assume [_BBN-0xFF] or [0-0xFF].
>>   		 */
>>   		root->secondary.end = 0xFF;
>> -		printk(KERN_WARNING FW_BUG PREFIX
>> -		       "no secondary bus range in _CRS\n");
>> -		status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
>> +		acpi_handle_warn(hdl,
>> +				 FW_BUG "no secondary bus range in _CRS\n");
>> +		status = acpi_evaluate_integer(hdl, METHOD_NAME__BBN,
>>   					       NULL, &bus);
>>   		if (ACPI_SUCCESS(status))
>>   			root->secondary.start = bus;
>>   		else if (status == AE_NOT_FOUND)
>>   			root->secondary.start = 0;
>>   		else {
>> -			printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
>> +			acpi_handle_err(hdl, "can't evaluate _BBN\n");
>>   			result = -ENODEV;
>>   			goto end;
>>   		}
>> @@ -425,11 +425,11 @@ static int acpi_pci_root_add(struct acpi_device *device,
>>   	strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
>>   	device->driver_data = root;
>>   
>> -	printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
>> +	pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
>>   	       acpi_device_name(device), acpi_device_bid(device),
>>   	       root->segment, &root->secondary);
>>   
>> -	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
>> +	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(hdl);
>>   
>>   	/*
>>   	 * All supported architectures that use ACPI have support for
>> @@ -473,7 +473,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
>>   		dev_info(&device->dev,
>>   			"Requesting ACPI _OSC control (0x%02x)\n", flags);
>>   
>> -		status = acpi_pci_osc_control_set(device->handle, &flags,
>> +		status = acpi_pci_osc_control_set(hdl, &flags,
>>   				       OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
>>   		if (ACPI_SUCCESS(status)) {
>>   			is_osc_granted = true;
>> @@ -505,9 +505,9 @@ static int acpi_pci_root_add(struct acpi_device *device,
>>   	 */
>>   	root->bus = pci_acpi_scan_root(root);
>>   	if (!root->bus) {
>> -		printk(KERN_ERR PREFIX
>> -			    "Bus %04x:%02x not present in PCI namespace\n",
>> -			    root->segment, (unsigned int)root->secondary.start);
>> +		acpi_handle_err(hdl,
>> +			"Bus %04x:%02x not present in PCI namespace\n",
>> +			root->segment, (unsigned int)root->secondary.start);
>>   		result = -ENODEV;
>>   		goto end;
>>   	}
>> @@ -517,8 +517,8 @@ static int acpi_pci_root_add(struct acpi_device *device,
>>   		if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
>>   			pcie_clear_aspm(root->bus);
>>   	} else {
>> -		pr_info("ACPI _OSC control for PCIe not granted, "
>> -			"disabling ASPM\n");
>> +		acpi_handle_info(hdl,
>> +			"ACPI _OSC control for PCIe not granted, disabling ASPM\n");
>>   		pcie_no_aspm();
>>   	}
>>   
>> @@ -571,12 +571,13 @@ static void handle_root_bridge_insertion(acpi_handle handle)
>>   	struct acpi_device *device;
>>   
>>   	if (!acpi_bus_get_device(handle, &device)) {
>> -		printk(KERN_DEBUG "acpi device exists...\n");
>> +		acpi_handle_printk(KERN_DEBUG, handle,
>> +				   "acpi device exists...\n");
> Do we have acpi_handle_dbg()?  If so, why don't you use it here? (And below.)
> If not, why don't you add it and use it here (and below)?
acpi_handle_dbg() only generates message if CONFIG_DEBUG is enabled,
so use pci_handle_printk(KERN_DEBUG, xxx) to keep original behavior.
Thanks,
Gerry
>
>>   		return;
>>   	}
>>   
>>   	if (acpi_bus_scan(handle))
>> -		printk(KERN_ERR "cannot add bridge to acpi list\n");
>> +		acpi_handle_err(handle, "cannot add bridge to acpi list\n");
>>   }
>>   
>>   static void handle_root_bridge_removal(struct acpi_device *device)
>> @@ -602,7 +603,6 @@ static void handle_root_bridge_removal(struct acpi_device *device)
>>   static void _handle_hotplug_event_root(struct work_struct *work)
>>   {
>>   	struct acpi_pci_root *root;
>> -	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER };
>>   	struct acpi_hp_work *hp_work;
>>   	acpi_handle handle;
>>   	u32 type;
>> @@ -613,13 +613,11 @@ static void _handle_hotplug_event_root(struct work_struct *work)
>>   
>>   	root = acpi_pci_find_root(handle);
>>   
>> -	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
>> -
>>   	switch (type) {
>>   	case ACPI_NOTIFY_BUS_CHECK:
>>   		/* bus enumerate */
>> -		printk(KERN_DEBUG "%s: Bus check notify on %s\n", __func__,
>> -				 (char *)buffer.pointer);
>> +		acpi_handle_printk(KERN_DEBUG, handle,
>> +				   "Bus check notify on %s\n", __func__);
>>   		if (!root)
>>   			handle_root_bridge_insertion(handle);
>>   
>> @@ -627,27 +625,26 @@ static void _handle_hotplug_event_root(struct work_struct *work)
>>   
>>   	case ACPI_NOTIFY_DEVICE_CHECK:
>>   		/* device check */
>> -		printk(KERN_DEBUG "%s: Device check notify on %s\n", __func__,
>> -				 (char *)buffer.pointer);
>> +		acpi_handle_printk(KERN_DEBUG, handle,
>> +				   "Device check notify on %s\n", __func__);
>>   		if (!root)
>>   			handle_root_bridge_insertion(handle);
>>   		break;
>>   
>>   	case ACPI_NOTIFY_EJECT_REQUEST:
>>   		/* request device eject */
>> -		printk(KERN_DEBUG "%s: Device eject notify on %s\n", __func__,
>> -				 (char *)buffer.pointer);
>> +		acpi_handle_printk(KERN_DEBUG, handle,
>> +				   "Device eject notify on %s\n", __func__);
>>   		if (root)
>>   			handle_root_bridge_removal(root->device);
>>   		break;
>>   	default:
>> -		printk(KERN_WARNING "notify_handler: unknown event type 0x%x for %s\n",
>> -				 type, (char *)buffer.pointer);
>> +		acpi_handle_warn(handle,
>> +			 "notify_handler: unknown event type 0x%xn", type);
>>   		break;
>>   	}
>>   
>>   	kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
>> -	kfree(buffer.pointer);
>>   }
>>   
>>   static void handle_hotplug_event_root(acpi_handle handle, u32 type,
>> @@ -661,9 +658,6 @@ static acpi_status __init
>>   find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
>>   {
>>   	acpi_status status;
>> -	char objname[64];
>> -	struct acpi_buffer buffer = { .length = sizeof(objname),
>> -				      .pointer = objname };
>>   	int *count = (int *)context;
>>   
>>   	if (!acpi_is_root_bridge(handle))
>> @@ -671,16 +665,15 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
>>   
>>   	(*count)++;
>>   
>> -	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
>> -
>>   	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
>>   					handle_hotplug_event_root, NULL);
>>   	if (ACPI_FAILURE(status))
>> -		printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n",
>> -				  objname, (unsigned int)status);
>> +		acpi_handle_printk(KERN_DEBUG, handle,
>> +			"notify handler is not installed, exit status: %u\n",
>> +			 (unsigned int)status);
>>   	else
>> -		printk(KERN_DEBUG "acpi root: %s notify handler is installed\n",
>> -				 objname);
>> +		acpi_handle_printk(KERN_DEBUG, handle,
>> +				   "notify handler is installed\n");
>>   
>>   	return AE_OK;
>>   }
> Thanks,
> Rafael
>
>

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Patch

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 91ddfd6..9ced5c3 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -379,23 +379,23 @@  static int acpi_pci_root_add(struct acpi_device *device,
 	struct acpi_pci_root *root;
 	u32 flags, base_flags;
 	bool is_osc_granted = false;
+	acpi_handle hdl = device->handle;
 
 	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
 	if (!root)
 		return -ENOMEM;
 
 	segment = 0;
-	status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
-				       &segment);
+	status = acpi_evaluate_integer(hdl, METHOD_NAME__SEG, NULL, &segment);
 	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-		printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
+		acpi_handle_err(hdl, "can't evaluate _SEG\n");
 		result = -ENODEV;
 		goto end;
 	}
 
 	/* Check _CRS first, then _BBN.  If no _BBN, default to zero. */
 	root->secondary.flags = IORESOURCE_BUS;
-	status = try_get_root_bridge_busnr(device->handle, &root->secondary);
+	status = try_get_root_bridge_busnr(hdl, &root->secondary);
 	if (ACPI_FAILURE(status)) {
 		/*
 		 * We need both the start and end of the downstream bus range
@@ -404,16 +404,16 @@  static int acpi_pci_root_add(struct acpi_device *device,
 		 * can do is assume [_BBN-0xFF] or [0-0xFF].
 		 */
 		root->secondary.end = 0xFF;
-		printk(KERN_WARNING FW_BUG PREFIX
-		       "no secondary bus range in _CRS\n");
-		status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
+		acpi_handle_warn(hdl,
+				 FW_BUG "no secondary bus range in _CRS\n");
+		status = acpi_evaluate_integer(hdl, METHOD_NAME__BBN,
 					       NULL, &bus);
 		if (ACPI_SUCCESS(status))
 			root->secondary.start = bus;
 		else if (status == AE_NOT_FOUND)
 			root->secondary.start = 0;
 		else {
-			printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
+			acpi_handle_err(hdl, "can't evaluate _BBN\n");
 			result = -ENODEV;
 			goto end;
 		}
@@ -425,11 +425,11 @@  static int acpi_pci_root_add(struct acpi_device *device,
 	strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
 	device->driver_data = root;
 
-	printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
+	pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
 	       acpi_device_name(device), acpi_device_bid(device),
 	       root->segment, &root->secondary);
 
-	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
+	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(hdl);
 
 	/*
 	 * All supported architectures that use ACPI have support for
@@ -473,7 +473,7 @@  static int acpi_pci_root_add(struct acpi_device *device,
 		dev_info(&device->dev,
 			"Requesting ACPI _OSC control (0x%02x)\n", flags);
 
-		status = acpi_pci_osc_control_set(device->handle, &flags,
+		status = acpi_pci_osc_control_set(hdl, &flags,
 				       OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
 		if (ACPI_SUCCESS(status)) {
 			is_osc_granted = true;
@@ -505,9 +505,9 @@  static int acpi_pci_root_add(struct acpi_device *device,
 	 */
 	root->bus = pci_acpi_scan_root(root);
 	if (!root->bus) {
-		printk(KERN_ERR PREFIX
-			    "Bus %04x:%02x not present in PCI namespace\n",
-			    root->segment, (unsigned int)root->secondary.start);
+		acpi_handle_err(hdl,
+			"Bus %04x:%02x not present in PCI namespace\n",
+			root->segment, (unsigned int)root->secondary.start);
 		result = -ENODEV;
 		goto end;
 	}
@@ -517,8 +517,8 @@  static int acpi_pci_root_add(struct acpi_device *device,
 		if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
 			pcie_clear_aspm(root->bus);
 	} else {
-		pr_info("ACPI _OSC control for PCIe not granted, "
-			"disabling ASPM\n");
+		acpi_handle_info(hdl,
+			"ACPI _OSC control for PCIe not granted, disabling ASPM\n");
 		pcie_no_aspm();
 	}
 
@@ -571,12 +571,13 @@  static void handle_root_bridge_insertion(acpi_handle handle)
 	struct acpi_device *device;
 
 	if (!acpi_bus_get_device(handle, &device)) {
-		printk(KERN_DEBUG "acpi device exists...\n");
+		acpi_handle_printk(KERN_DEBUG, handle,
+				   "acpi device exists...\n");
 		return;
 	}
 
 	if (acpi_bus_scan(handle))
-		printk(KERN_ERR "cannot add bridge to acpi list\n");
+		acpi_handle_err(handle, "cannot add bridge to acpi list\n");
 }
 
 static void handle_root_bridge_removal(struct acpi_device *device)
@@ -602,7 +603,6 @@  static void handle_root_bridge_removal(struct acpi_device *device)
 static void _handle_hotplug_event_root(struct work_struct *work)
 {
 	struct acpi_pci_root *root;
-	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER };
 	struct acpi_hp_work *hp_work;
 	acpi_handle handle;
 	u32 type;
@@ -613,13 +613,11 @@  static void _handle_hotplug_event_root(struct work_struct *work)
 
 	root = acpi_pci_find_root(handle);
 
-	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
-
 	switch (type) {
 	case ACPI_NOTIFY_BUS_CHECK:
 		/* bus enumerate */
-		printk(KERN_DEBUG "%s: Bus check notify on %s\n", __func__,
-				 (char *)buffer.pointer);
+		acpi_handle_printk(KERN_DEBUG, handle,
+				   "Bus check notify on %s\n", __func__);
 		if (!root)
 			handle_root_bridge_insertion(handle);
 
@@ -627,27 +625,26 @@  static void _handle_hotplug_event_root(struct work_struct *work)
 
 	case ACPI_NOTIFY_DEVICE_CHECK:
 		/* device check */
-		printk(KERN_DEBUG "%s: Device check notify on %s\n", __func__,
-				 (char *)buffer.pointer);
+		acpi_handle_printk(KERN_DEBUG, handle,
+				   "Device check notify on %s\n", __func__);
 		if (!root)
 			handle_root_bridge_insertion(handle);
 		break;
 
 	case ACPI_NOTIFY_EJECT_REQUEST:
 		/* request device eject */
-		printk(KERN_DEBUG "%s: Device eject notify on %s\n", __func__,
-				 (char *)buffer.pointer);
+		acpi_handle_printk(KERN_DEBUG, handle,
+				   "Device eject notify on %s\n", __func__);
 		if (root)
 			handle_root_bridge_removal(root->device);
 		break;
 	default:
-		printk(KERN_WARNING "notify_handler: unknown event type 0x%x for %s\n",
-				 type, (char *)buffer.pointer);
+		acpi_handle_warn(handle,
+			 "notify_handler: unknown event type 0x%xn", type);
 		break;
 	}
 
 	kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
-	kfree(buffer.pointer);
 }
 
 static void handle_hotplug_event_root(acpi_handle handle, u32 type,
@@ -661,9 +658,6 @@  static acpi_status __init
 find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
 	acpi_status status;
-	char objname[64];
-	struct acpi_buffer buffer = { .length = sizeof(objname),
-				      .pointer = objname };
 	int *count = (int *)context;
 
 	if (!acpi_is_root_bridge(handle))
@@ -671,16 +665,15 @@  find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 	(*count)++;
 
-	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
-
 	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
 					handle_hotplug_event_root, NULL);
 	if (ACPI_FAILURE(status))
-		printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n",
-				  objname, (unsigned int)status);
+		acpi_handle_printk(KERN_DEBUG, handle,
+			"notify handler is not installed, exit status: %u\n",
+			 (unsigned int)status);
 	else
-		printk(KERN_DEBUG "acpi root: %s notify handler is installed\n",
-				 objname);
+		acpi_handle_printk(KERN_DEBUG, handle,
+				   "notify handler is installed\n");
 
 	return AE_OK;
 }