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authorAndrey Smirnov <andrew.smirnov@gmail.com>2019-08-12 23:08:52 +0300
committerWim Van Sebroeck <wim@linux-watchdog.org>2019-09-17 09:59:05 +0300
commitdc0dd28951f16be9714e90468e14566d186a7388 (patch)
treee4b6917eea58638d85357d76dbe14b884f1f78ae /drivers/watchdog/ziirave_wdt.c
parent08188e8dbc7587d58948efca493219515d6a5639 (diff)
downloadlinux-dc0dd28951f16be9714e90468e14566d186a7388.tar.xz
watchdog: ziirave_wdt: Skip zeros when calculating checksum
Zeros don't contribute anything to checksum value, so we can skip unused portion of the packet when calculating its checksum. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Rick Ramstetter <rick@anteaterllc.com> Cc: linux-watchdog@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20190812200906.31344-9-andrew.smirnov@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog/ziirave_wdt.c')
-rw-r--r--drivers/watchdog/ziirave_wdt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c
index 9d9c669b8b47..19da0910c2d1 100644
--- a/drivers/watchdog/ziirave_wdt.c
+++ b/drivers/watchdog/ziirave_wdt.c
@@ -271,7 +271,7 @@ static int __ziirave_firm_write_pkt(struct watchdog_device *wdd,
memcpy(packet + 3, data, len);
/* Packet checksum */
- for (i = 0; i < ZIIRAVE_FIRM_PKT_TOTAL_SIZE - 1; i++)
+ for (i = 0; i < len + 3; i++)
checksum += packet[i];
packet[ZIIRAVE_FIRM_PKT_TOTAL_SIZE - 1] = checksum;