[PATCH v4] mmc-utils: Use printf() to extract and print fw version

[Oleh Kravchenko <oleg@kaa.org.ua>]

This patch also fixes a compile error with a newer version of GCC:
error: '__builtin_strncpy' output may be truncated copying 8 bytes from
a string of length 511 [-Werror=stringop-truncation]

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Reviewed-by: Bean Huo <beanhuo@micron.com>
---
 mmc_cmds.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

PATCH v4
Update commit message.

diff --git a/mmc_cmds.c b/mmc_cmds.c
index 73bd32a..e07ec94 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1392,7 +1392,6 @@ int do_read_extcsd(int nargs, char **argv)
 	__u32 regl;
 	int fd, ret;
 	char *device;
-	char lbuf[10];
 	const char *str;
 
 	if (nargs != 2) {
@@ -1834,9 +1833,7 @@ int do_read_extcsd(int nargs, char **argv)
 	}
 
 	if (ext_csd_rev >= 7) {
-                memset(lbuf, 0, sizeof(lbuf));
-		strncpy(lbuf, (char*)&ext_csd[EXT_CSD_FIRMWARE_VERSION], 8);
-		printf("eMMC Firmware Version: %s\n", lbuf);
+		printf("eMMC Firmware Version: %.8s\n", (char*)&ext_csd[EXT_CSD_FIRMWARE_VERSION]);
 		printf("eMMC Life Time Estimation A [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x%02x\n",
 			ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]);
 		printf("eMMC Life Time Estimation B [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]: 0x%02x\n",
-- 
2.32.0