PCI: acpiphp: Convert to dynamic debug

This patch is to use pr_debug/info/warn/err to replace acpiphp debug
functions and remove module's debug param.

User interface change: before this patch, boot with the "acpiphp.debug"
kernel parameter to turn on debug.  After this patch, set
CONFIG_DYNAMIC_DEBUG=y and boot with "acpiphp.dyndebug=+p" instead.
See Documentation/dynamic-debug-howto.txt.

[bhelgaas: changelog]
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

3 files changed, 30 insertions, 40 deletions

diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index f4e028924667..26100f510b10 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -39,16 +39,6 @@
 #include <linux/mutex.h>
 #include <linux/pci_hotplug.h>
 
-#define dbg(format, arg...)                                     \
-        do {                                                    \
-                if (acpiphp_debug)                              \
-                        printk(KERN_DEBUG "%s: " format,        \
-                                MY_NAME , ## arg);              \
-        } while (0)
-#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
-#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
-#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
-
 struct acpiphp_context;
 struct acpiphp_bridge;
 struct acpiphp_slot;
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index bf2203ef1308..8650d39db392 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -31,6 +31,8 @@
  *
  */
 
+#define pr_fmt(fmt) "acpiphp: " fmt
+
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -43,12 +45,9 @@
 #include <linux/smp.h>
 #include "acpiphp.h"
 
-#define MY_NAME "acpiphp"
-
 /* name size which is used for entries in pcihpfs */
 #define SLOT_NAME_SIZE  21              /* {_SUN} */
 
-bool acpiphp_debug;
 bool acpiphp_disabled;
 
 /* local variables */
@@ -61,9 +60,7 @@ static struct acpiphp_attention_info *attention_info;
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
-MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
 MODULE_PARM_DESC(disable, "disable acpiphp driver");
-module_param_named(debug, acpiphp_debug, bool, 0644);
 module_param_named(disable, acpiphp_disabled, bool, 0444);
 
 /* export the attention callback registration methods */
@@ -139,7 +136,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
 {
         struct slot *slot = hotplug_slot->private;
 
-        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
+        pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
 
         /* enable the specified slot */
         return acpiphp_enable_slot(slot->acpi_slot);
@@ -156,7 +153,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
 {
         struct slot *slot = hotplug_slot->private;
 
-        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
+        pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
 
         /* disable the specified slot */
         return acpiphp_disable_and_eject_slot(slot->acpi_slot);
@@ -176,8 +173,9 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
  {
         int retval = -ENODEV;
 
-        dbg("%s - physical_slot = %s\n", __func__, hotplug_slot_name(hotplug_slot));
- 
+        pr_debug("%s - physical_slot = %s\n", __func__,
+                hotplug_slot_name(hotplug_slot));
+
         if (attention_info && try_module_get(attention_info->owner)) {
                 retval = attention_info->set_attn(hotplug_slot, status);
                 module_put(attention_info->owner);
@@ -199,7 +197,7 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 {
         struct slot *slot = hotplug_slot->private;
 
-        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
+        pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
 
         *value = acpiphp_get_power_status(slot->acpi_slot);
 
@@ -221,7 +219,8 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 {
         int retval = -EINVAL;
 
-        dbg("%s - physical_slot = %s\n", __func__, hotplug_slot_name(hotplug_slot));
+        pr_debug("%s - physical_slot = %s\n", __func__,
+                hotplug_slot_name(hotplug_slot));
 
         if (attention_info && try_module_get(attention_info->owner)) {
                 retval = attention_info->get_attn(hotplug_slot, value);
@@ -244,7 +243,7 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 {
         struct slot *slot = hotplug_slot->private;
 
-        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
+        pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
 
         *value = acpiphp_get_latch_status(slot->acpi_slot);
 
@@ -264,7 +263,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 {
         struct slot *slot = hotplug_slot->private;
 
-        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
+        pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
 
         *value = acpiphp_get_adapter_status(slot->acpi_slot);
 
@@ -279,7 +278,7 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
 {
         struct slot *slot = hotplug_slot->private;
 
-        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
+        pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
 
         kfree(slot->hotplug_slot);
         kfree(slot);
@@ -322,11 +321,11 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
         if (retval == -EBUSY)
                 goto error_hpslot;
         if (retval) {
-                err("pci_hp_register failed with error %d\n", retval);
+                pr_err("pci_hp_register failed with error %d\n", retval);
                 goto error_hpslot;
         }
 
-        info("Slot [%s] registered\n", slot_name(slot));
+        pr_info("Slot [%s] registered\n", slot_name(slot));
 
         return 0;
 error_hpslot:
@@ -343,17 +342,17 @@ void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
         struct slot *slot = acpiphp_slot->slot;
         int retval = 0;
 
-        info("Slot [%s] unregistered\n", slot_name(slot));
+        pr_info("Slot [%s] unregistered\n", slot_name(slot));
 
         retval = pci_hp_deregister(slot->hotplug_slot);
         if (retval)
-                err("pci_hp_deregister failed with error %d\n", retval);
+                pr_err("pci_hp_deregister failed with error %d\n", retval);
 }
 
 
 void __init acpiphp_init(void)
 {
-        info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
+        pr_info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
                 acpiphp_disabled ? ", disabled by user; please report a bug"
                                  : "");
 }
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 0b7d23b4ad95..6557702a0592 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -39,6 +39,8 @@
  *    bus. It loses the refcount when the the driver unloads.
  */
 
+#define pr_fmt(fmt) "acpiphp_glue: " fmt
+
 #include <linux/init.h>
 #include <linux/module.h>
 
@@ -58,8 +60,6 @@ static LIST_HEAD(bridge_list);
 static DEFINE_MUTEX(bridge_mutex);
 static DEFINE_MUTEX(acpiphp_context_lock);
 
-#define MY_NAME "acpiphp_glue"
-
 static void handle_hotplug_event(acpi_handle handle, u32 type, void *data);
 static void acpiphp_sanitize_bus(struct pci_bus *bus);
 static void acpiphp_set_hpp_values(struct pci_bus *bus);
@@ -335,7 +335,7 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
                 if (ACPI_FAILURE(status))
                         sun = bridge->nr_slots;
 
-                dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
+                pr_debug("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
                     sun, pci_domain_nr(pbus), pbus->number, device);
 
                 retval = acpiphp_register_hotplug_slot(slot, sun);
@@ -343,10 +343,10 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
                         slot->slot = NULL;
                         bridge->nr_slots--;
                         if (retval == -EBUSY)
-                                warn("Slot %llu already registered by another "
+                                pr_warn("Slot %llu already registered by another "
                                         "hotplug driver\n", sun);
                         else
-                                warn("acpiphp_register_hotplug_slot failed "
+                                pr_warn("acpiphp_register_hotplug_slot failed "
                                         "(err code = 0x%x)\n", retval);
                 }
                 /* Even if the slot registration fails, we can still use it. */
@@ -369,7 +369,7 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
                 if (register_hotplug_dock_device(handle,
                         &acpiphp_dock_ops, context,
                         acpiphp_dock_init, acpiphp_dock_release))
-                        dbg("failed to register dock device\n");
+                        pr_debug("failed to register dock device\n");
         }
 
         /* install notify handler */
@@ -427,7 +427,7 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
                                                         ACPI_SYSTEM_NOTIFY,
                                                         handle_hotplug_event);
                                 if (ACPI_FAILURE(status))
-                                        err("failed to remove notify handler\n");
+                                        pr_err("failed to remove notify handler\n");
                         }
                 }
                 if (slot->slot)
@@ -830,8 +830,9 @@ static void hotplug_event(acpi_handle handle, u32 type, void *data)
         switch (type) {
         case ACPI_NOTIFY_BUS_CHECK:
                 /* bus re-enumerate */
-                dbg("%s: Bus check notify on %s\n", __func__, objname);
-                dbg("%s: re-enumerating slots under %s\n", __func__, objname);
+                pr_debug("%s: Bus check notify on %s\n", __func__, objname);
+                pr_debug("%s: re-enumerating slots under %s\n",
+                         __func__, objname);
                 if (bridge) {
                         acpiphp_check_bridge(bridge);
                 } else {
@@ -845,7 +846,7 @@ static void hotplug_event(acpi_handle handle, u32 type, void *data)
 
         case ACPI_NOTIFY_DEVICE_CHECK:
                 /* device check */
-                dbg("%s: Device check notify on %s\n", __func__, objname);
+                pr_debug("%s: Device check notify on %s\n", __func__, objname);
                 if (bridge) {
                         acpiphp_check_bridge(bridge);
                 } else {
@@ -866,7 +867,7 @@ static void hotplug_event(acpi_handle handle, u32 type, void *data)
 
         case ACPI_NOTIFY_EJECT_REQUEST:
                 /* request device eject */
-                dbg("%s: Device eject notify on %s\n", __func__, objname);
+                pr_debug("%s: Device eject notify on %s\n", __func__, objname);
                 acpiphp_disable_and_eject_slot(func->slot);
                 break;
         }