os/drivers/lcd/lcd_dev.c: Declare LCD HAL layer instance locally insi…

…de lcddev_register function

Replaced the global LCD HAL layer instance with a local declaration within the lcddev_register function
and passed this instance to LCD_FLUSH_THREAD by converting its address to a string using atoi() function.

os/drivers/lcd/lcd_dev.c

@@ -93,7 +93,6 @@ struct lcd_s {
 	bool do_wait;
 #endif
 };
-static struct lcd_s *lcd_info;
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
@@ -376,10 +375,12 @@ static int lcddev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 }
 
 #if defined(CONFIG_LCD_FLUSH_THREAD)
-static void lcd_flushing_thread(void)
+static void lcd_flushing_thread(int argc, char **argv)
 {
 	int ret;
+	DEBUGASSERT(argc == 2);
 	FAR struct lcddev_area_s *lcd_area;
+	struct lcd_s *lcd_info = (struct lcd_s *)strtoul(argv[1], NULL, 16);
 	lcd_area = &(lcd_info->lcd_area);
 	while (true) {
 		while (sem_wait(&lcd_info->flushing_sem) != 0) {
@@ -423,13 +424,15 @@ int lcddev_register(struct lcd_dev_s *dev)
 {
 	char devname[16] = { 0, };
 	int ret;
+	char *parm[2];
+	char parm_buf[9]; /* for storing 32 bit address */
 
 	if (!dev) {
 		return -EINVAL;
 	}
 
 	/* Allocate a new lcd_dev driver instance */
-	lcd_info = (struct lcd_s *)kmm_zalloc(sizeof(struct lcd_s));
+	struct lcd_s *lcd_info = (struct lcd_s *)kmm_zalloc(sizeof(struct lcd_s));
 	if (!lcd_info) {
 		return -ENOMEM;
 	}
@@ -444,8 +447,10 @@ int lcddev_register(struct lcd_dev_s *dev)
 		lcddbg("ERROR: Failed to allocate memory for LCD flush swap buffer\n");
 		return -ENOMEM;
 	}
-
-	int pid = kernel_thread("LCD Frame flusing", 204, 8192, lcd_flushing_thread, NULL);
+	itoa((int)lcd_info, parm_buf, 16);
+	parm[0] = parm_buf;
+	parm[1] = NULL;
+	int pid = kernel_thread("LCD Frame flusing", 204, 8192, lcd_flushing_thread, (FAR char *const *)parm);
 	if (pid < 0) {
 		lcddbg("ERROR: Failed to start LCD Frame Flusing thread\n");
 		return -ENOMEM;