From 50a4da890102a455e5cd3dd358c38650d07178d3 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 8 Apr 2009 15:39:38 +0000 Subject: ACPI: button: whitespace changes This patch changes a bit of whitespace to follow Linux conventions. Signed-off-by: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/acpi/button.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index d73c94b8441..52eb06ea4f8 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -1,5 +1,5 @@ /* - * acpi_button.c - ACPI Button Driver ($Revision: 30 $) + * button.c - ACPI Button Driver * * Copyright (C) 2001, 2002 Andy Grover * Copyright (C) 2001, 2002 Paul Diefenbaugh @@ -133,7 +133,6 @@ static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) seq_printf(seq, "type: %s\n", acpi_device_name(button->device)); - return 0; } @@ -259,6 +258,7 @@ static int acpi_lid_send_state(struct acpi_button *button) &state); if (ACPI_FAILURE(status)) return -ENODEV; + /* input layer checks if event is redundant */ input_report_switch(button->input, SW_LID, !state); input_sync(button->input); @@ -299,13 +299,12 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) "Unsupported event [0x%x]\n", event)); break; } - - return; } static int acpi_button_resume(struct acpi_device *device) { struct acpi_button *button; + if (!device) return -EINVAL; button = acpi_driver_data(device); @@ -424,7 +423,6 @@ static int acpi_button_add(struct acpi_device *device) printk(KERN_INFO PREFIX "%s [%s]\n", acpi_device_name(device), acpi_device_bid(device)); - return 0; err_remove_fs: @@ -448,7 +446,6 @@ static int acpi_button_remove(struct acpi_device *device, int type) acpi_button_remove_fs(device); input_unregister_device(button->input); kfree(button); - return 0; } @@ -459,6 +456,7 @@ static int __init acpi_button_init(void) acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); if (!acpi_button_dir) return -ENODEV; + result = acpi_bus_register_driver(&acpi_button_driver); if (result < 0) { remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); -- cgit v1.2.3 From e2fb9754d27513918a4936e8cbaad50ff56cfd3d Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 8 Apr 2009 15:39:43 +0000 Subject: ACPI: button: remove unnecessary null pointer checks Better to oops and learn about a bug than to silently cover it up. Signed-off-by: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/acpi/button.c | 22 +--------------------- 1 file changed, 1 insertion(+), 21 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 52eb06ea4f8..c4632366226 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -128,9 +128,6 @@ static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) { struct acpi_button *button = seq->private; - if (!button || !button->device) - return 0; - seq_printf(seq, "type: %s\n", acpi_device_name(button->device)); return 0; @@ -147,9 +144,6 @@ static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) acpi_status status; unsigned long long state; - if (!button || !button->device) - return 0; - status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state); seq_printf(seq, "state: %s\n", ACPI_FAILURE(status) ? "unsupported" : @@ -171,9 +165,6 @@ static int acpi_button_add_fs(struct acpi_device *device) struct proc_dir_entry *entry = NULL; struct acpi_button *button; - if (!device || !acpi_driver_data(device)) - return -EINVAL; - button = acpi_driver_data(device); switch (button->type) { @@ -270,9 +261,6 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) struct acpi_button *button = acpi_driver_data(device); struct input_dev *input; - if (!button || !button->device) - return; - switch (event) { case ACPI_FIXED_HARDWARE_EVENT: event = ACPI_BUTTON_NOTIFY_STATUS; @@ -305,10 +293,8 @@ static int acpi_button_resume(struct acpi_device *device) { struct acpi_button *button; - if (!device) - return -EINVAL; button = acpi_driver_data(device); - if (button && button->type == ACPI_BUTTON_TYPE_LID) + if (button->type == ACPI_BUTTON_TYPE_LID) return acpi_lid_send_state(button); return 0; } @@ -319,9 +305,6 @@ static int acpi_button_add(struct acpi_device *device) struct acpi_button *button; struct input_dev *input; - if (!device) - return -EINVAL; - button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); if (!button) return -ENOMEM; @@ -438,9 +421,6 @@ static int acpi_button_remove(struct acpi_device *device, int type) { struct acpi_button *button; - if (!device || !acpi_driver_data(device)) - return -EINVAL; - button = acpi_driver_data(device); acpi_button_remove_fs(device); -- cgit v1.2.3 From 1bce81131c71064bc3163078f24545b839a31967 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 8 Apr 2009 15:39:49 +0000 Subject: ACPI: button: use Linux style for getting driver_data It's typical and slightly more compact to look up the driver_data structure by initializing the automatic variable at its definition. Signed-off-by: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/acpi/button.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index c4632366226..8ef8f443f53 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -162,10 +162,8 @@ static struct proc_dir_entry *acpi_lid_dir; static int acpi_button_add_fs(struct acpi_device *device) { + struct acpi_button *button = acpi_driver_data(device); struct proc_dir_entry *entry = NULL; - struct acpi_button *button; - - button = acpi_driver_data(device); switch (button->type) { case ACPI_BUTTON_TYPE_POWER: @@ -291,9 +289,8 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) static int acpi_button_resume(struct acpi_device *device) { - struct acpi_button *button; + struct acpi_button *button = acpi_driver_data(device); - button = acpi_driver_data(device); if (button->type == ACPI_BUTTON_TYPE_LID) return acpi_lid_send_state(button); return 0; @@ -301,9 +298,9 @@ static int acpi_button_resume(struct acpi_device *device) static int acpi_button_add(struct acpi_device *device) { - int error; struct acpi_button *button; struct input_dev *input; + int error; button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); if (!button) @@ -419,9 +416,7 @@ static int acpi_button_add(struct acpi_device *device) static int acpi_button_remove(struct acpi_device *device, int type) { - struct acpi_button *button; - - button = acpi_driver_data(device); + struct acpi_button *button = acpi_driver_data(device); acpi_button_remove_fs(device); input_unregister_device(button->input); -- cgit v1.2.3 From bf04a77227db76f163bc2355ef4e176794987be2 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 8 Apr 2009 15:39:54 +0000 Subject: ACPI: button: cache hid/name/class pointers This patch adds temporaries to cache the acpi_device_hid(), acpi_device_name(), and acpi_device_class() pointers so we don't have to clutter the code with so many uses of those interfaces. Signed-off-by: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/acpi/button.c | 48 ++++++++++++++++++++++++------------------------ 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 8ef8f443f53..9f6d2e6844a 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -300,6 +300,7 @@ static int acpi_button_add(struct acpi_device *device) { struct acpi_button *button; struct input_dev *input; + char *hid, *name, *class; int error; button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); @@ -315,40 +316,41 @@ static int acpi_button_add(struct acpi_device *device) goto err_free_button; } + hid = acpi_device_hid(device); + name = acpi_device_name(device); + class = acpi_device_class(device); + /* * Determine the button type (via hid), as fixed-feature buttons * need to be handled a bit differently than generic-space. */ - if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) { + if (!strcmp(hid, ACPI_BUTTON_HID_POWER)) { button->type = ACPI_BUTTON_TYPE_POWER; - strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER); - sprintf(acpi_device_class(device), "%s/%s", + strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); + sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); - } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) { + } else if (!strcmp(hid, ACPI_BUTTON_HID_POWERF)) { button->type = ACPI_BUTTON_TYPE_POWERF; - strcpy(acpi_device_name(device), - ACPI_BUTTON_DEVICE_NAME_POWERF); - sprintf(acpi_device_class(device), "%s/%s", + strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWERF); + sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); - } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) { + } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP)) { button->type = ACPI_BUTTON_TYPE_SLEEP; - strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP); - sprintf(acpi_device_class(device), "%s/%s", + strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); + sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); - } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) { + } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { button->type = ACPI_BUTTON_TYPE_SLEEPF; - strcpy(acpi_device_name(device), - ACPI_BUTTON_DEVICE_NAME_SLEEPF); - sprintf(acpi_device_class(device), "%s/%s", + strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEPF); + sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); - } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) { + } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { button->type = ACPI_BUTTON_TYPE_LID; - strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID); - sprintf(acpi_device_class(device), "%s/%s", + strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); + sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); } else { - printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", - acpi_device_hid(device)); + printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); error = -ENODEV; goto err_free_input; } @@ -357,10 +359,9 @@ static int acpi_button_add(struct acpi_device *device) if (error) goto err_free_input; - snprintf(button->phys, sizeof(button->phys), - "%s/button/input0", acpi_device_hid(device)); + snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); - input->name = acpi_device_name(device); + input->name = name; input->phys = button->phys; input->id.bustype = BUS_HOST; input->id.product = button->type; @@ -401,8 +402,7 @@ static int acpi_button_add(struct acpi_device *device) device->wakeup.state.enabled = 1; } - printk(KERN_INFO PREFIX "%s [%s]\n", - acpi_device_name(device), acpi_device_bid(device)); + printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); return 0; err_remove_fs: -- cgit v1.2.3 From 106c19e7b978e1b84ea5cabbd470a0ddced577c8 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 8 Apr 2009 15:39:59 +0000 Subject: ACPI: button: remove button->device pointer We no longer need a pointer from struct acpi_button back to the struct acpi_device. Everywhere we used that pointer, we either already have, or can easily get, the acpi_device pointer without using the copy from acpi_button. So this patch removes the structure element. Signed-off-by: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/acpi/button.c | 31 +++++++++++++------------------ 1 file changed, 13 insertions(+), 18 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 9f6d2e6844a..c8441627f68 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -95,7 +95,6 @@ static struct acpi_driver acpi_button_driver = { }; struct acpi_button { - struct acpi_device *device; /* Fixed button kludge */ unsigned int type; struct input_dev *input; char phys[32]; /* for input device */ @@ -126,10 +125,10 @@ static struct proc_dir_entry *acpi_button_dir; static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) { - struct acpi_button *button = seq->private; + struct acpi_device *device = seq->private; seq_printf(seq, "type: %s\n", - acpi_device_name(button->device)); + acpi_device_name(device)); return 0; } @@ -140,11 +139,11 @@ static int acpi_button_info_open_fs(struct inode *inode, struct file *file) static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) { - struct acpi_button *button = seq->private; + struct acpi_device *device = seq->private; acpi_status status; unsigned long long state; - status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state); + status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); seq_printf(seq, "state: %s\n", ACPI_FAILURE(status) ? "unsupported" : (state ? "open" : "closed")); @@ -198,8 +197,7 @@ static int acpi_button_add_fs(struct acpi_device *device) /* 'info' [R] */ entry = proc_create_data(ACPI_BUTTON_FILE_INFO, S_IRUGO, acpi_device_dir(device), - &acpi_button_info_fops, - acpi_driver_data(device)); + &acpi_button_info_fops, device); if (!entry) return -ENODEV; @@ -207,8 +205,7 @@ static int acpi_button_add_fs(struct acpi_device *device) if (button->type == ACPI_BUTTON_TYPE_LID) { entry = proc_create_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, acpi_device_dir(device), - &acpi_button_state_fops, - acpi_driver_data(device)); + &acpi_button_state_fops, device); if (!entry) return -ENODEV; } @@ -238,13 +235,13 @@ static int acpi_button_remove_fs(struct acpi_device *device) /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ -static int acpi_lid_send_state(struct acpi_button *button) +static int acpi_lid_send_state(struct acpi_device *device) { + struct acpi_button *button = acpi_driver_data(device); unsigned long long state; acpi_status status; - status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, - &state); + status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); if (ACPI_FAILURE(status)) return -ENODEV; @@ -266,7 +263,7 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) case ACPI_BUTTON_NOTIFY_STATUS: input = button->input; if (button->type == ACPI_BUTTON_TYPE_LID) { - acpi_lid_send_state(button); + acpi_lid_send_state(device); } else { int keycode = test_bit(KEY_SLEEP, input->keybit) ? KEY_SLEEP : KEY_POWER; @@ -277,8 +274,7 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) input_sync(input); } - acpi_bus_generate_proc_event(button->device, event, - ++button->pushed); + acpi_bus_generate_proc_event(device, event, ++button->pushed); break; default: ACPI_DEBUG_PRINT((ACPI_DB_INFO, @@ -292,7 +288,7 @@ static int acpi_button_resume(struct acpi_device *device) struct acpi_button *button = acpi_driver_data(device); if (button->type == ACPI_BUTTON_TYPE_LID) - return acpi_lid_send_state(button); + return acpi_lid_send_state(device); return 0; } @@ -307,7 +303,6 @@ static int acpi_button_add(struct acpi_device *device) if (!button) return -ENOMEM; - button->device = device; device->driver_data = button; button->input = input = input_allocate_device(); @@ -390,7 +385,7 @@ static int acpi_button_add(struct acpi_device *device) if (error) goto err_remove_fs; if (button->type == ACPI_BUTTON_TYPE_LID) - acpi_lid_send_state(button); + acpi_lid_send_state(device); if (device->wakeup.flags.valid) { /* Button's GPE is run-wake GPE */ -- cgit v1.2.3 From d68b597c883cf863c7216564cae08a4730d56cc1 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 8 Apr 2009 15:40:04 +0000 Subject: ACPI: button: remove control method/fixed hardware distinctions This patch removes the driver distinction between control method (CM) and fixed hardware (FF) buttons. We previously needed that so we could install either a fixed event handler or a notify handler, but the Linux/ACPI code now handles that for us, so we don't need to worry about it. Note that this removes the FF/CM annotation from the "info" files in /proc. For example, /proc/acpi/button/PWRF/info: -type: Power Button (FF) +type: Power Button I don't think there's anything meaningful user-space can do by knowing whether a button is a control method or a fixed hardware button, so nobody should be looking at the FF/CM. Signed-off-by: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/acpi/button.c | 32 ++++++-------------------------- 1 file changed, 6 insertions(+), 26 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index c8441627f68..9195deba9d9 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -41,17 +41,13 @@ #define ACPI_BUTTON_SUBCLASS_POWER "power" #define ACPI_BUTTON_HID_POWER "PNP0C0C" -#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)" -#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)" +#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" #define ACPI_BUTTON_TYPE_POWER 0x01 -#define ACPI_BUTTON_TYPE_POWERF 0x02 #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" -#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)" -#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)" +#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" #define ACPI_BUTTON_TYPE_SLEEP 0x03 -#define ACPI_BUTTON_TYPE_SLEEPF 0x04 #define ACPI_BUTTON_SUBCLASS_LID "lid" #define ACPI_BUTTON_HID_LID "PNP0C0D" @@ -166,14 +162,12 @@ static int acpi_button_add_fs(struct acpi_device *device) switch (button->type) { case ACPI_BUTTON_TYPE_POWER: - case ACPI_BUTTON_TYPE_POWERF: if (!acpi_power_dir) acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); entry = acpi_power_dir; break; case ACPI_BUTTON_TYPE_SLEEP: - case ACPI_BUTTON_TYPE_SLEEPF: if (!acpi_sleep_dir) acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); @@ -315,30 +309,18 @@ static int acpi_button_add(struct acpi_device *device) name = acpi_device_name(device); class = acpi_device_class(device); - /* - * Determine the button type (via hid), as fixed-feature buttons - * need to be handled a bit differently than generic-space. - */ - if (!strcmp(hid, ACPI_BUTTON_HID_POWER)) { + if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || + !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { button->type = ACPI_BUTTON_TYPE_POWER; strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); - } else if (!strcmp(hid, ACPI_BUTTON_HID_POWERF)) { - button->type = ACPI_BUTTON_TYPE_POWERF; - strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWERF); - sprintf(class, "%s/%s", - ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); - } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP)) { + } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || + !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { button->type = ACPI_BUTTON_TYPE_SLEEP; strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); sprintf(class, "%s/%s", ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); - } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { - button->type = ACPI_BUTTON_TYPE_SLEEPF; - strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEPF); - sprintf(class, "%s/%s", - ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { button->type = ACPI_BUTTON_TYPE_LID; strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); @@ -364,13 +346,11 @@ static int acpi_button_add(struct acpi_device *device) switch (button->type) { case ACPI_BUTTON_TYPE_POWER: - case ACPI_BUTTON_TYPE_POWERF: input->evbit[0] = BIT_MASK(EV_KEY); set_bit(KEY_POWER, input->keybit); break; case ACPI_BUTTON_TYPE_SLEEP: - case ACPI_BUTTON_TYPE_SLEEPF: input->evbit[0] = BIT_MASK(EV_KEY); set_bit(KEY_SLEEP, input->keybit); break; -- cgit v1.2.3