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watchdog: imx2_wdt: Fix set_timeout for big timeout values

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[ Upstream commit b07e228eee ]

The documentated behavior is: if max_hw_heartbeat_ms is implemented, the
minimum of the set_timeout argument and max_hw_heartbeat_ms should be used.
This patch implements this behavior.
Previously only the first 7bits were used and the input argument was
returned.

Signed-off-by: Georg Hofmann <georg@hofmannsweb.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Georg Hofmann
2019-04-08 21:25:54 +02:00
committed by Greg Kroah-Hartman
parent 647fa64837
commit c3278ccc98
1 changed files with 3 additions and 1 deletions
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4
drivers/watchdog/imx2_wdt.c
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@@ -181,8 +181,10 @@ static void __imx2_wdt_set_timeout(struct watchdog_device *wdog,
static int imx2_wdt_set_timeout(struct watchdog_device *wdog,
unsigned int new_timeout)
{
__imx2_wdt_set_timeout(wdog, new_timeout);
unsigned int actual;
actual = min(new_timeout, wdog->max_hw_heartbeat_ms * 1000);
__imx2_wdt_set_timeout(wdog, actual);
wdog->timeout = new_timeout;
return 0;
}