[PATCH v2 10/22] watchdog: ziirave_wdt: Zero out only what's necessary

[Andrey Smirnov]

Instead of zeroing out all of the packet and then overwriting a
significant portion of those zeros via memcpy(), zero out only a
portion of the packet that is known to not contain any data.

Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
Cc: Chris Healy <cphe...@gmail.com>
Cc: Guenter Roeck <li...@roeck-us.net>
Cc: Rick Ramstetter <r...@anteaterllc.com>
Cc: linux-watch...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/watchdog/ziirave_wdt.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c
index e0f55cbdc603..69694f2836d7 100644
--- a/drivers/watchdog/ziirave_wdt.c
+++ b/drivers/watchdog/ziirave_wdt.c
@@ -260,8 +260,6 @@ static int __ziirave_firm_write_pkt(struct watchdog_device 
*wdd,
                return -EMSGSIZE;
        }
 
-       memset(packet, 0, sizeof(packet));
-
        /* Packet length */
        packet[0] = len;
        /* Packet address */
@@ -269,6 +267,7 @@ static int __ziirave_firm_write_pkt(struct watchdog_device 
*wdd,
        packet[2] = (addr16 & 0xff00) >> 8;
 
        memcpy(packet + 3, data, len);
+       memset(packet + 3 + len, 0, ZIIRAVE_FIRM_PKT_DATA_SIZE - len);
 
        /* Packet checksum */
        for (i = 0; i < len + 3; i++)
-- 
2.21.0