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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2019-08-12 13:08:52 -0700 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2019-09-17 08:59:05 +0200 |
| commit | dc0dd28951f16be9714e90468e14566d186a7388 (patch) | |
| tree | e4b6917eea58638d85357d76dbe14b884f1f78ae /drivers/watchdog | |
| parent | 08188e8dbc7587d58948efca493219515d6a5639 (diff) | |
| download | linux-stable-dc0dd28951f16be9714e90468e14566d186a7388.tar.gz linux-stable-dc0dd28951f16be9714e90468e14566d186a7388.tar.bz2 linux-stable-dc0dd28951f16be9714e90468e14566d186a7388.zip | |
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')
| -rw-r--r-- | drivers/watchdog/ziirave_wdt.c | 2 |
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; |