[PATCH v2 17/22] watchdog: ziirave_wdt: Fix DOWNLOAD_END payload

[Andrey Smirnov]

Bootloader firmware expects the following traffic for DOWNLOAD_END:

S Addr Wr [A] 0x11 [A] P

using ziirave_firm_write_byte() will result in

S Addr Wr [A] 0x11 [A] 0x01 [A] 0x01 [A] P

which happens to work because firmware will ignore any extra bytes
sent. Fix this by converting the code to use i2c_smbus_write_byte()
instead.

Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
Cc: Chris Healy <cphealy@xxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Rick Ramstetter <rick@xxxxxxxxxxxxxxx>
Cc: linux-watchdog@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 drivers/watchdog/ziirave_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c
index 0185b9175cc0..a598780d73d3 100644
--- a/drivers/watchdog/ziirave_wdt.c
+++ b/drivers/watchdog/ziirave_wdt.c
@@ -425,7 +425,7 @@ static int ziirave_firm_upload(struct watchdog_device *wdd,
 	}
 
 	/* End download operation */
-	ret = ziirave_firm_write_byte(wdd, ZIIRAVE_CMD_DOWNLOAD_END, 1, false);
+	ret = i2c_smbus_write_byte(client, ZIIRAVE_CMD_DOWNLOAD_END);
 	if (ret) {
 		dev_err(&client->dev,
 			"Failed to end firmware download: %d\n", ret);
-- 
2.21.0