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ACPI: button: remove unnecessary null pointer checks

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Better to oops and learn about a bug than to silently cover it up.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-04-08 15:39:43 +00:00 committed by Len Brown
parent 50a4da8901
commit e2fb9754d2
1 changed files with 1 additions and 21 deletions
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22
drivers/acpi/button.c
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@ -128,9 +128,6 @@ static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{ {
struct acpi_button *button = seq->private; struct acpi_button *button = seq->private;
if (!button || !button->device)
return 0;
seq_printf(seq, "type: %s\n", seq_printf(seq, "type: %s\n",
acpi_device_name(button->device)); acpi_device_name(button->device));
return 0; return 0;
@ -147,9 +144,6 @@ static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
acpi_status status; acpi_status status;
unsigned long long state; unsigned long long state;
if (!button || !button->device)
return 0;
status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state); status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
seq_printf(seq, "state: %s\n", seq_printf(seq, "state: %s\n",
ACPI_FAILURE(status) ? "unsupported" : 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 proc_dir_entry *entry = NULL;
struct acpi_button *button; struct acpi_button *button;
if (!device || !acpi_driver_data(device))
return -EINVAL;
button = acpi_driver_data(device); button = acpi_driver_data(device);
switch (button->type) { 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 acpi_button *button = acpi_driver_data(device);
struct input_dev *input; struct input_dev *input;
if (!button || !button->device)
return;
switch (event) { switch (event) {
case ACPI_FIXED_HARDWARE_EVENT: case ACPI_FIXED_HARDWARE_EVENT:
event = ACPI_BUTTON_NOTIFY_STATUS; event = ACPI_BUTTON_NOTIFY_STATUS;
@ -305,10 +293,8 @@ static int acpi_button_resume(struct acpi_device *device)
{ {
struct acpi_button *button; struct acpi_button *button;
if (!device)
return -EINVAL;
button = acpi_driver_data(device); 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 acpi_lid_send_state(button);
return 0; return 0;
} }
@ -319,9 +305,6 @@ static int acpi_button_add(struct acpi_device *device)
struct acpi_button *button; struct acpi_button *button;
struct input_dev *input; struct input_dev *input;
if (!device)
return -EINVAL;
button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
if (!button) if (!button)
return -ENOMEM; return -ENOMEM;
@ -438,9 +421,6 @@ static int acpi_button_remove(struct acpi_device *device, int type)
{ {
struct acpi_button *button; struct acpi_button *button;
if (!device || !acpi_driver_data(device))
return -EINVAL;
button = acpi_driver_data(device); button = acpi_driver_data(device);
acpi_button_remove_fs(device); acpi_button_remove_fs(device);