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Message-ID: <2246899.HyxBmBtjVt@kreacher>
Date: Fri, 19 Feb 2021 19:17:44 +0100
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux ACPI <linux-acpi@...r.kernel.org>
Cc: Linux PCI <linux-pci@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Bjorn Helgaas <helgaas@...nel.org>,
Hanjun Guo <guohanjun@...wei.com>
Subject: [PATCH v1 4/4] ACPI: PCI: Replace direct printk() invocations in pci_link.c
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Replace the direct printk() invocations in pci_link.c with (mostly
corresponding) acpi_handle_*() calls relative to the ACPI handle of
the given link device, which allows the AML corresponding to those
messages to be identified more easily, or with pr_*() calls.
While at it, add a pr_fmt() definition ot pci_link.c, make
acpi_pci_link_check_possible() print all messages with
acpi_handle_debug() for consistency and replace the (not-so-
reliable) KERN_CONT-based message line composition in
acpi_pci_link_add() with two pr_info() and a series of
acpi_handle_debug() calls (the latter for the possible IRQs).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
drivers/acpi/pci_link.c | 86 +++++++++++++++++++++---------------------------
1 file changed, 38 insertions(+), 48 deletions(-)
Index: linux-pm/drivers/acpi/pci_link.c
===================================================================
--- linux-pm.orig/drivers/acpi/pci_link.c
+++ linux-pm/drivers/acpi/pci_link.c
@@ -12,6 +12,8 @@
* for IRQ management (e.g. start()->_SRS).
*/
+#define pr_fmt(fmt) "ACPI: PCI: " fmt
+
#include <linux/syscore_ops.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -102,9 +104,9 @@ static acpi_status acpi_pci_link_check_p
(i < p->interrupt_count
&& i < ACPI_PCI_LINK_MAX_POSSIBLE); i++) {
if (!p->interrupts[i]) {
- printk(KERN_WARNING PREFIX
- "Invalid _PRS IRQ %d\n",
- p->interrupts[i]);
+ acpi_handle_debug(handle,
+ "Invalid _PRS IRQ %d\n",
+ p->interrupts[i]);
continue;
}
link->irq.possible[i] = p->interrupts[i];
@@ -120,17 +122,17 @@ static acpi_status acpi_pci_link_check_p
struct acpi_resource_extended_irq *p =
&resource->data.extended_irq;
if (!p || !p->interrupt_count) {
- printk(KERN_WARNING PREFIX
- "Blank _PRS EXT IRQ resource\n");
+ acpi_handle_debug(handle,
+ "Blank _PRS EXT IRQ resource\n");
return AE_OK;
}
for (i = 0;
(i < p->interrupt_count
&& i < ACPI_PCI_LINK_MAX_POSSIBLE); i++) {
if (!p->interrupts[i]) {
- printk(KERN_WARNING PREFIX
- "Invalid _PRS IRQ %d\n",
- p->interrupts[i]);
+ acpi_handle_debug(handle,
+ "Invalid _PRS IRQ %d\n",
+ p->interrupts[i]);
continue;
}
link->irq.possible[i] = p->interrupts[i];
@@ -142,8 +144,8 @@ static acpi_status acpi_pci_link_check_p
break;
}
default:
- printk(KERN_ERR PREFIX "_PRS resource type 0x%x isn't an IRQ\n",
- resource->type);
+ acpi_handle_debug(handle, "_PRS resource type 0x%x is not IRQ\n",
+ resource->type);
return AE_OK;
}
@@ -527,6 +529,7 @@ static int acpi_irq_balance = -1; /* 0:
static int acpi_pci_link_allocate(struct acpi_pci_link *link)
{
+ acpi_handle handle = link->device->handle;
int irq;
int i;
@@ -549,8 +552,8 @@ static int acpi_pci_link_allocate(struct
*/
if (i == link->irq.possible_count) {
if (acpi_strict)
- printk(KERN_WARNING PREFIX "_CRS %d not found"
- " in _PRS\n", link->irq.active);
+ acpi_handle_warn(handle, "_CRS %d not found in _PRS\n",
+ link->irq.active);
link->irq.active = 0;
}
@@ -574,28 +577,23 @@ static int acpi_pci_link_allocate(struct
}
}
if (acpi_irq_get_penalty(irq) >= PIRQ_PENALTY_ISA_ALWAYS) {
- printk(KERN_ERR PREFIX "No IRQ available for %s [%s]. "
- "Try pci=noacpi or acpi=off\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device));
+ acpi_handle_err(handle,
+ "No IRQ available. Try pci=noacpi or acpi=off\n");
return -ENODEV;
}
/* Attempt to enable the link device at this IRQ. */
if (acpi_pci_link_set(link, irq)) {
- printk(KERN_ERR PREFIX "Unable to set IRQ for %s [%s]. "
- "Try pci=noacpi or acpi=off\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device));
+ acpi_handle_err(handle,
+ "Unable to set IRQ. Try pci=noacpi or acpi=off\n");
return -ENODEV;
} else {
if (link->irq.active < ACPI_MAX_ISA_IRQS)
acpi_isa_irq_penalty[link->irq.active] +=
PIRQ_PENALTY_PCI_USING;
- pr_info("%s [%s] enabled at IRQ %d\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device), link->irq.active);
+ acpi_handle_info(handle, "Enabled at IRQ %d\n",
+ link->irq.active);
}
link->irq.initialized = 1;
@@ -616,19 +614,19 @@ int acpi_pci_link_allocate_irq(acpi_hand
result = acpi_bus_get_device(handle, &device);
if (result) {
- printk(KERN_ERR PREFIX "Invalid link device\n");
+ acpi_handle_err(handle, "Invalid link device\n");
return -1;
}
link = acpi_driver_data(device);
if (!link) {
- printk(KERN_ERR PREFIX "Invalid link context\n");
+ acpi_handle_err(handle, "Invalid link context\n");
return -1;
}
/* TBD: Support multiple index (IRQ) entries per Link Device */
if (index) {
- printk(KERN_ERR PREFIX "Invalid index %d\n", index);
+ acpi_handle_err(handle, "Invalid index %d\n", index);
return -1;
}
@@ -640,7 +638,7 @@ int acpi_pci_link_allocate_irq(acpi_hand
if (!link->irq.active) {
mutex_unlock(&acpi_link_lock);
- printk(KERN_ERR PREFIX "Link active IRQ is 0!\n");
+ acpi_handle_err(handle, "Link active IRQ is 0!\n");
return -1;
}
link->refcnt++;
@@ -668,20 +666,20 @@ int acpi_pci_link_free_irq(acpi_handle h
result = acpi_bus_get_device(handle, &device);
if (result) {
- printk(KERN_ERR PREFIX "Invalid link device\n");
+ acpi_handle_err(handle, "Invalid link device\n");
return -1;
}
link = acpi_driver_data(device);
if (!link) {
- printk(KERN_ERR PREFIX "Invalid link context\n");
+ acpi_handle_err(handle, "Invalid link context\n");
return -1;
}
mutex_lock(&acpi_link_lock);
if (!link->irq.initialized) {
mutex_unlock(&acpi_link_lock);
- printk(KERN_ERR PREFIX "Link isn't initialized\n");
+ acpi_handle_err(handle, "Link isn't initialized\n");
return -1;
}
#ifdef FUTURE_USE
@@ -712,10 +710,10 @@ int acpi_pci_link_free_irq(acpi_handle h
static int acpi_pci_link_add(struct acpi_device *device,
const struct acpi_device_id *not_used)
{
- int result;
+ acpi_handle handle = device->handle;
struct acpi_pci_link *link;
+ int result;
int i;
- int found = 0;
link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
if (!link)
@@ -734,31 +732,23 @@ static int acpi_pci_link_add(struct acpi
/* query and set link->irq.active */
acpi_pci_link_get_current(link);
- printk(KERN_INFO PREFIX "%s [%s] (IRQs", acpi_device_name(device),
- acpi_device_bid(device));
+ pr_info("Interrupt link %s configured for IRQ %d\n",
+ acpi_device_bid(device), link->irq.active);
+
for (i = 0; i < link->irq.possible_count; i++) {
- if (link->irq.active == link->irq.possible[i]) {
- printk(KERN_CONT " *%d", link->irq.possible[i]);
- found = 1;
- } else
- printk(KERN_CONT " %d", link->irq.possible[i]);
+ if (link->irq.active != link->irq.possible[i])
+ acpi_handle_debug(handle, "Possible IRQ %d\n",
+ link->irq.possible[i]);
}
- printk(KERN_CONT ")");
-
- if (!found)
- printk(KERN_CONT " *%d", link->irq.active);
-
if (!link->device->status.enabled)
- printk(KERN_CONT ", disabled.");
-
- printk(KERN_CONT "\n");
+ pr_info("Interrupt link %s disabled\n", acpi_device_bid(device));
list_add_tail(&link->list, &acpi_link_list);
end:
/* disable all links -- to be activated on use */
- acpi_evaluate_object(device->handle, "_DIS", NULL, NULL);
+ acpi_evaluate_object(handle, "_DIS", NULL, NULL);
mutex_unlock(&acpi_link_lock);
if (result)
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