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watchdog: aspeed: fix hardware timeout calculation
[ Upstream commite7dc481c92
] Fix hardware timeout calculation in aspeed_wdt_set_timeout function to ensure the reload value does not exceed the hardware limit. Fixes:efa859f7d7
("watchdog: Add Aspeed watchdog driver") Reported-by: Amithash Prasad <amithash@fb.com> Signed-off-by: Tao Ren <rentao.bupt@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20210417034249.5978-1-rentao.bupt@gmail.com 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>
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@ -147,7 +147,7 @@ static int aspeed_wdt_set_timeout(struct watchdog_device *wdd,
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wdd->timeout = timeout;
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actual = min(timeout, wdd->max_hw_heartbeat_ms * 1000);
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actual = min(timeout, wdd->max_hw_heartbeat_ms / 1000);
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writel(actual * WDT_RATE_1MHZ, wdt->base + WDT_RELOAD_VALUE);
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writel(WDT_RESTART_MAGIC, wdt->base + WDT_RESTART);
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