Input: tc3589x-keypad - fix keymap size

The keymap size used by tc3589x is too low, leading to the driver
overwriting other people's memory.  Fix this by making the driver
use the automatically allocated keymap provided by
matrix_keypad_build_keymap() instead of allocating one on its own.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/tc3589x-keypad.c

@@ -70,8 +70,6 @@
 #define TC3589x_EVT_INT_CLR	0x2
 #define TC3589x_KBD_INT_CLR	0x1
 
-#define TC3589x_KBD_KEYMAP_SIZE     64
-
 /**
  * struct tc_keypad - data structure used by keypad driver
  * @tc3589x:    pointer to tc35893
@@ -88,7 +86,7 @@ struct tc_keypad {
 	const struct tc3589x_keypad_platform_data *board;
 	unsigned int krow;
 	unsigned int kcol;
-	unsigned short keymap[TC3589x_KBD_KEYMAP_SIZE];
+	unsigned short *keymap;
 	bool keypad_stopped;
 };
 
@@ -338,12 +336,14 @@ static int tc3589x_keypad_probe(struct platform_device *pdev)
 
 	error = matrix_keypad_build_keymap(plat->keymap_data, NULL,
 					   TC3589x_MAX_KPROW, TC3589x_MAX_KPCOL,
-					   keypad->keymap, input);
+					   NULL, input);
 	if (error) {
 		dev_err(&pdev->dev, "Failed to build keymap\n");
 		goto err_free_mem;
 	}
 
+	keypad->keymap = input->keycode;
+
 	input_set_capability(input, EV_MSC, MSC_SCAN);
 	if (!plat->no_autorepeat)
 		__set_bit(EV_REP, input->evbit);