Staging: panel: Replace NULL comparison.

Use ! operating instead of NULL checks.
Addresses "CHECK: Comparison to NULL" from checkpatch.pl.

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
index 498d623..a7e3875 100644 (file)
--- a/drivers/staging/panel/panel.c
+++ b/drivers/staging/panel/panel.c
@@ -920,7 +920,7 @@ static void lcd_gotoxy(void)
 static void lcd_print(char c)
 {
        if (lcd.addr.x < lcd.bwidth) {
-               if (lcd_char_conv != NULL)
+               if (lcd_char_conv)
                        c = lcd_char_conv[(unsigned char)c];
                lcd_write_data(c);
                lcd.addr.x++;
@@ -1118,7 +1118,7 @@ static inline int handle_lcd_special_code(void)
                break;
        case '*':
                /* flash back light using the keypad timer */
-               if (scan_timer.function != NULL) {
+               if (scan_timer.function) {
                        if (lcd.light_tempo == 0
                                        && ((lcd.flags & LCD_FLAG_L) == 0))
                                lcd_backlight(1);
@@ -1200,7 +1200,7 @@ static inline int handle_lcd_special_code(void)
                char value;
                int addr;
 
-               if (strchr(esc, ';') == NULL)
+               if (!strchr(esc, ';'))
                        break;
 
                esc++;
@@ -1246,7 +1246,7 @@ static inline int handle_lcd_special_code(void)
        }
        case 'x':       /* gotoxy : LxXXX[yYYY]; */
        case 'y':       /* gotoxy : LyYYY[xXXX]; */
-               if (strchr(esc, ';') == NULL)
+               if (!strchr(esc, ';'))
                        break;
 
                while (*esc) {
@@ -1844,7 +1844,7 @@ static inline int input_state_high(struct logical_input *input)
                if ((input->type == INPUT_TYPE_STD) &&
                    (input->high_timer == 0)) {
                        input->high_timer++;
-                       if (input->u.std.press_fct != NULL)
+                       if (input->u.std.press_fct)
                                input->u.std.press_fct(input->u.std.press_data);
                } else if (input->type == INPUT_TYPE_KBD) {
                        /* will turn on the light */
@@ -1924,7 +1924,7 @@ static inline void input_state_falling(struct logical_input *input)
                if (input->type == INPUT_TYPE_STD) {
                        void (*release_fct)(int) = input->u.std.release_fct;
 
-                       if (release_fct != NULL)
+                       if (release_fct)
                                release_fct(input->u.std.release_data);
                } else if (input->type == INPUT_TYPE_KBD) {
                        char *release_str = input->u.kbd.release_str;
@@ -2025,7 +2025,7 @@ static void panel_scan_timer(void)
 
 static void init_scan_timer(void)
 {
-       if (scan_timer.function != NULL)
+       if (scan_timer.function)
                return;         /* already started */
 
        setup_timer(&scan_timer, (void *)&panel_scan_timer, 0);
@@ -2229,7 +2229,7 @@ static void panel_attach(struct parport *port)
        /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */
 
        pprt = parport_register_dev_model(port, "panel", &panel_cb, 0);
-       if (pprt == NULL) {
+       if (!pprt) {
                pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n",
                       __func__, port->number, parport);
                return;
@@ -2276,10 +2276,10 @@ static void panel_detach(struct parport *port)
                       __func__, port->number, parport);
                return;
        }
-       if (scan_timer.function != NULL)
+       if (scan_timer.function)
                del_timer_sync(&scan_timer);
 
-       if (pprt != NULL) {
+       if (pprt) {
                if (keypad.enabled) {
                        misc_deregister(&keypad_dev);
                        keypad_initialized = 0;