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

From: Liu Jiang
Date: Tue May 14 2013 - 08:47:14 EST

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@xxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Cc: linux-acpi@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
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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