read_file: Pass NULL for the size parameter if the return value is not used

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
Link: https://lore.barebox.org/20220609072629.15723-1-eagle.alexander923@gmail.com
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 7 insertions, 13 deletions

diff --git a/arch/arm/boards/kindle-mx50/board.c b/arch/arm/boards/kindle-mx50/board.c
index 8fc5af8320..4cfd68a258 100644
--- a/arch/arm/boards/kindle-mx50/board.c
+++ b/arch/arm/boards/kindle-mx50/board.c
@@ -84,10 +84,9 @@ static char *mac;
 static void kindle_rev_init(void)
 {
 	int ret;
-	size_t size;
 	void *buf;
 	const char userdata[] = "/dev/mmc2.boot0.userdata";
-	ret = read_file_2(userdata, &size, &buf, 128);
+	ret = read_file_2(userdata, NULL, &buf, 128);
 	if (ret && ret != -EFBIG) {
 		pr_err("Could not read board info from %s\n", userdata);
 		return;
diff --git a/arch/arm/boards/vscom-baltos/board.c b/arch/arm/boards/vscom-baltos/board.c
index 59782d2990..83c7dbc8b0 100644
--- a/arch/arm/boards/vscom-baltos/board.c
+++ b/arch/arm/boards/vscom-baltos/board.c
@@ -85,7 +85,6 @@ static uint8_t get_dip_switch(uint16_t id, uint32_t rev)
 static int baltos_read_eeprom(void)
 {
 	struct bsp_vs_hwparam hw_param;
-	size_t size;
 	char *buf, var_buf[32];
 	int rc;
 	unsigned char mac_addr[6];
@@ -95,7 +94,7 @@ static int baltos_read_eeprom(void)
 		return 0;
 
 	rc = read_file_2("/dev/eeprom0",
-			 &size,
+			 NULL,
 			 (void *)&buf,
 			 sizeof(hw_param));
 	if (rc && rc != -EFBIG)
diff --git a/arch/arm/mach-omap/xload.c b/arch/arm/mach-omap/xload.c
index 6d3704b8cf..6a02e2b589 100644
--- a/arch/arm/mach-omap/xload.c
+++ b/arch/arm/mach-omap/xload.c
@@ -115,7 +115,6 @@ static void *omap_xload_boot_mmc(void)
 {
 	int ret;
 	void *buf;
-	int len;
 	const char *diskdev;
 	char *partname;
 
@@ -137,9 +136,9 @@ static void *omap_xload_boot_mmc(void)
 
 	free(partname);
 
-	buf = read_file("/barebox.bin", &len);
+	buf = read_file("/barebox.bin", NULL);
 	if (!buf)
-		buf = read_file("/boot/barebox.bin", &len);
+		buf = read_file("/boot/barebox.bin", NULL);
 	if (!buf) {
 		printf("could not read barebox.bin from sd card\n");
 		return NULL;
@@ -156,7 +155,6 @@ static void *omap_xload_boot_spi(struct omap_barebox_part *part)
 static void *omap4_xload_boot_usb(void){
 	int ret;
 	void *buf;
-	int len;
 
 	ret = mount("omap4_usbboot", "omap4_usbbootfs", "/", NULL);
 	if (ret) {
@@ -164,7 +162,7 @@ static void *omap4_xload_boot_usb(void){
 		return NULL;
 	}
 
-	buf = read_file("/barebox.bin", &len);
+	buf = read_file("/barebox.bin", NULL);
 	if (!buf)
 		printf("could not read barebox.bin from omap4_usbbootfs\n");
 
@@ -175,7 +173,6 @@ static void *omap_serial_boot(void){
 	struct console_device *cdev;
 	int ret;
 	void *buf;
-	int len;
 	int fd;
 
 	/* need temporary place to store file */
@@ -203,7 +200,7 @@ static void *omap_serial_boot(void){
 		return NULL;
 	}
 
-	buf = read_file("/barebox.bin", &len);
+	buf = read_file("/barebox.bin", NULL);
 	if (!buf)
 		printf("could not read barebox.bin from serial\n");
 
@@ -216,7 +213,6 @@ static void *am33xx_net_boot(void)
 {
 	void *buf = NULL;
 	int err;
-	int len;
 	struct dhcp_req_param dhcp_param;
 	const char *bootfile;
 	IPaddr_t ip;
@@ -276,7 +272,7 @@ static void *am33xx_net_boot(void)
 
 	file = basprintf("%s/%s", TFTP_MOUNT, bootfile);
 
-	buf = read_file(file, &len);
+	buf = read_file(file, NULL);
 	if (!buf)
 		printf("could not read %s.\n", bootfile);