PCI: acpiphp_ibm: Convert to dynamic debug

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

User interface change: before this patch, boot with the "acpiphp_ibm.debug"
kernel parameter to turn on debug.  After this patch, set
CONFIG_DYNAMIC_DEBUG=y and boot with "acpiphp_ibm.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>

1 files changed, 24 insertions, 34 deletions

diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index 2f5786c8522c..0d64c414bf78 100644
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -25,6 +25,8 @@
  *
  */
 
+#define pr_fmt(fmt) "acpiphp_ibm: " fmt
+
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/module.h>
@@ -43,23 +45,11 @@
 #define DRIVER_AUTHOR   "Irene Zubarev <zubarev@us.ibm.com>, Vernon Mauery <vernux@us.ibm.com>"
 #define DRIVER_DESC     "ACPI Hot Plug PCI Controller Driver IBM extension"
 
-static bool debug;
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRIVER_VERSION);
-module_param(debug, bool, 0644);
-MODULE_PARM_DESC(debug, " Debugging mode enabled or not");
-#define MY_NAME "acpiphp_ibm"
-
-#undef dbg
-#define dbg(format, arg...)                             \
-do {                                                    \
-        if (debug)                                      \
-                printk(KERN_DEBUG "%s: " format,        \
-                                MY_NAME , ## arg);      \
-} while (0)
 
 #define FOUND_APCI 0x61504349
 /* these are the names for the IBM ACPI pseudo-device */
@@ -189,7 +179,7 @@ static int ibm_set_attention_status(struct hotplug_slot *slot, u8 status)
 
         ibm_slot = ibm_slot_from_id(hpslot_to_sun(slot));
 
-        dbg("%s: set slot %d (%d) attention status to %d\n", __func__,
+        pr_debug("%s: set slot %d (%d) attention status to %d\n", __func__,
                         ibm_slot->slot.slot_num, ibm_slot->slot.slot_id,
                         (status ? 1 : 0));
 
@@ -202,10 +192,10 @@ static int ibm_set_attention_status(struct hotplug_slot *slot, u8 status)
 
         stat = acpi_evaluate_integer(ibm_acpi_handle, "APLS", &params, &rc);
         if (ACPI_FAILURE(stat)) {
-                err("APLS evaluation failed:  0x%08x\n", stat);
+                pr_err("APLS evaluation failed:  0x%08x\n", stat);
                 return -ENODEV;
         } else if (!rc) {
-                err("APLS method failed:  0x%08llx\n", rc);
+                pr_err("APLS method failed:  0x%08llx\n", rc);
                 return -ERANGE;
         }
         return 0;
@@ -234,7 +224,7 @@ static int ibm_get_attention_status(struct hotplug_slot *slot, u8 *status)
         else
                 *status = 0;
 
-        dbg("%s: get slot %d (%d) attention status is %d\n", __func__,
+        pr_debug("%s: get slot %d (%d) attention status is %d\n", __func__,
                         ibm_slot->slot.slot_num, ibm_slot->slot.slot_id,
                         *status);
 
@@ -266,10 +256,10 @@ static void ibm_handle_events(acpi_handle handle, u32 event, void *context)
         u8 subevent = event & 0xf0;
         struct notification *note = context;
 
-        dbg("%s: Received notification %02x\n", __func__, event);
+        pr_debug("%s: Received notification %02x\n", __func__, event);
 
         if (subevent == 0x80) {
-                dbg("%s: generationg bus event\n", __func__);
+                pr_debug("%s: generationg bus event\n", __func__);
                 acpi_bus_generate_netlink_event(note->device->pnp.device_class,
                                                   dev_name(&note->device->dev),
                                                   note->event, detail);
@@ -301,7 +291,7 @@ static int ibm_get_table_from_acpi(char **bufp)
 
         status = acpi_evaluate_object(ibm_acpi_handle, "APCI", NULL, &buffer);
         if (ACPI_FAILURE(status)) {
-                err("%s:  APCI evaluation failed\n", __func__);
+                pr_err("%s:  APCI evaluation failed\n", __func__);
                 return -ENODEV;
         }
 
@@ -309,13 +299,13 @@ static int ibm_get_table_from_acpi(char **bufp)
         if (!(package) ||
                         (package->type != ACPI_TYPE_PACKAGE) ||
                         !(package->package.elements)) {
-                err("%s:  Invalid APCI object\n", __func__);
+                pr_err("%s:  Invalid APCI object\n", __func__);
                 goto read_table_done;
         }
 
         for(size = 0, i = 0; i < package->package.count; i++) {
                 if (package->package.elements[i].type != ACPI_TYPE_BUFFER) {
-                        err("%s:  Invalid APCI element %d\n", __func__, i);
+                        pr_err("%s:  Invalid APCI element %d\n", __func__, i);
                         goto read_table_done;
                 }
                 size += package->package.elements[i].buffer.length;
@@ -325,7 +315,7 @@ static int ibm_get_table_from_acpi(char **bufp)
                 goto read_table_done;
 
         lbuf = kzalloc(size, GFP_KERNEL);
-        dbg("%s: element count: %i, ASL table size: %i, &table = 0x%p\n",
+        pr_debug("%s: element count: %i, ASL table size: %i, &table = 0x%p\n",
                         __func__, package->package.count, size, lbuf);
 
         if (lbuf) {
@@ -370,8 +360,8 @@ static ssize_t ibm_read_apci_table(struct file *filp, struct kobject *kobj,
 {
         int bytes_read = -EINVAL;
         char *table = NULL;
-        
-        dbg("%s: pos = %d, size = %zd\n", __func__, (int)pos, size);
+
+        pr_debug("%s: pos = %d, size = %zd\n", __func__, (int)pos, size);
 
         if (pos == 0) {
                 bytes_read = ibm_get_table_from_acpi(&table);
@@ -403,7 +393,7 @@ static acpi_status __init ibm_find_acpi_device(acpi_handle handle,
 
         status = acpi_get_object_info(handle, &info);
         if (ACPI_FAILURE(status)) {
-                err("%s:  Failed to get device information status=0x%x\n",
+                pr_err("%s:  Failed to get device information status=0x%x\n",
                         __func__, status);
                 return retval;
         }
@@ -411,7 +401,7 @@ static acpi_status __init ibm_find_acpi_device(acpi_handle handle,
         if (info->current_status && (info->valid & ACPI_VALID_HID) &&
                         (!strcmp(info->hardware_id.string, IBM_HARDWARE_ID1) ||
                          !strcmp(info->hardware_id.string, IBM_HARDWARE_ID2))) {
-                dbg("found hardware: %s, handle: %p\n",
+                pr_debug("found hardware: %s, handle: %p\n",
                         info->hardware_id.string, handle);
                 *phandle = handle;
                 /* returning non-zero causes the search to stop
@@ -432,18 +422,18 @@ static int __init ibm_acpiphp_init(void)
         struct acpi_device *device;
         struct kobject *sysdir = &pci_slots_kset->kobj;
 
-        dbg("%s\n", __func__);
+        pr_debug("%s\n", __func__);
 
         if (acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
                         ACPI_UINT32_MAX, ibm_find_acpi_device, NULL,
                         &ibm_acpi_handle, NULL) != FOUND_APCI) {
-                err("%s: acpi_walk_namespace failed\n", __func__);
+                pr_err("%s: acpi_walk_namespace failed\n", __func__);
                 retval = -ENODEV;
                 goto init_return;
         }
-        dbg("%s: found IBM aPCI device\n", __func__);
+        pr_debug("%s: found IBM aPCI device\n", __func__);
         if (acpi_bus_get_device(ibm_acpi_handle, &device)) {
-                err("%s: acpi_bus_get_device failed\n", __func__);
+                pr_err("%s: acpi_bus_get_device failed\n", __func__);
                 retval = -ENODEV;
                 goto init_return;
         }
@@ -457,7 +447,7 @@ static int __init ibm_acpiphp_init(void)
                         ACPI_DEVICE_NOTIFY, ibm_handle_events,
                         &ibm_note);
         if (ACPI_FAILURE(status)) {
-                err("%s: Failed to register notification handler\n",
+                pr_err("%s: Failed to register notification handler\n",
                                 __func__);
                 retval = -EBUSY;
                 goto init_cleanup;
@@ -479,17 +469,17 @@ static void __exit ibm_acpiphp_exit(void)
         acpi_status status;
         struct kobject *sysdir = &pci_slots_kset->kobj;
 
-        dbg("%s\n", __func__);
+        pr_debug("%s\n", __func__);
 
         if (acpiphp_unregister_attention(&ibm_attention_info))
-                err("%s: attention info deregistration failed", __func__);
+                pr_err("%s: attention info deregistration failed", __func__);
 
         status = acpi_remove_notify_handler(
                            ibm_acpi_handle,
                            ACPI_DEVICE_NOTIFY,
                            ibm_handle_events);
         if (ACPI_FAILURE(status))
-                err("%s: Notification handler removal failed\n", __func__);
+                pr_err("%s: Notification handler removal failed\n", __func__);
         /* remove the /sys entries */
         sysfs_remove_bin_file(sysdir, &ibm_apci_table_attr);
 }