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Input: matrix-keypad - allocate keycodes with keypad structure

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Instead of allocating and managing keymap separately from the keypad
structure stick it at the end as a variable-length array.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2012-04-20 22:33:08 -07:00
parent 0508c19a6f
commit 01111fcd42
1 changed files with 10 additions and 13 deletions
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21
drivers/input/keyboard/matrix_keypad.c
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@ -27,7 +27,6 @@
struct matrix_keypad {
const struct matrix_keypad_platform_data *pdata;
struct input_dev *input_dev;
unsigned short *keycodes;
unsigned int row_shift;
DECLARE_BITMAP(disabled_gpios, MATRIX_MAX_ROWS);
@ -38,6 +37,8 @@ struct matrix_keypad {
bool scan_pending;
bool stopped;
bool gpio_all_disabled;
unsigned short keycodes[];
};
/*
@ -381,8 +382,8 @@ static int __devinit matrix_keypad_probe(struct platform_device *pdev)
const struct matrix_keymap_data *keymap_data;
struct matrix_keypad *keypad;
struct input_dev *input_dev;
unsigned short *keycodes;
unsigned int row_shift;
size_t keymap_size;
int err;
pdata = pdev->dev.platform_data;
@ -398,20 +399,18 @@ static int __devinit matrix_keypad_probe(struct platform_device *pdev)
}
row_shift = get_count_order(pdata->num_col_gpios);
keypad = kzalloc(sizeof(struct matrix_keypad), GFP_KERNEL);
keycodes = kzalloc((pdata->num_row_gpios << row_shift) *
sizeof(*keycodes),
keymap_size = (pdata->num_row_gpios << row_shift) *
sizeof(keypad->keycodes[0]);
keypad = kzalloc(sizeof(struct matrix_keypad) + keymap_size,
GFP_KERNEL);
input_dev = input_allocate_device();
if (!keypad || !keycodes || !input_dev) {
if (!keypad || !input_dev) {
err = -ENOMEM;
goto err_free_mem;
}
keypad->input_dev = input_dev;
keypad->pdata = pdata;
keypad->keycodes = keycodes;
keypad->row_shift = row_shift;
keypad->stopped = true;
INIT_DELAYED_WORK(&keypad->work, matrix_keypad_scan);
@ -426,8 +425,8 @@ static int __devinit matrix_keypad_probe(struct platform_device *pdev)
input_dev->open = matrix_keypad_start;
input_dev->close = matrix_keypad_stop;
input_dev->keycode = keycodes;
input_dev->keycodesize = sizeof(*keycodes);
input_dev->keycode = keypad->keycodes;
input_dev->keycodesize = sizeof(keypad->keycodes[0]);
input_dev->keycodemax = pdata->num_row_gpios << row_shift;
matrix_keypad_build_keymap(keymap_data, row_shift,
@ -451,7 +450,6 @@ static int __devinit matrix_keypad_probe(struct platform_device *pdev)
err_free_mem:
input_free_device(input_dev);
kfree(keycodes);
kfree(keypad);
return err;
}
@ -479,7 +477,6 @@ static int __devexit matrix_keypad_remove(struct platform_device *pdev)
input_unregister_device(keypad->input_dev);
platform_set_drvdata(pdev, NULL);
kfree(keypad->keycodes);
kfree(keypad);
return 0;