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watchdog: rzg2l_wdt: Fix 32bit overflow issue
[ Upstream commitea2949df22
] The value of timer_cycle_us can be 0 due to 32bit overflow. For eg:- If we assign the counter value "0xfff" for computing maxval. This patch fixes this issue by appending ULL to 1024, so that it is promoted to 64bit. This patch also fixes the warning message, 'watchdog: Invalid min and max timeout values, resetting to 0!'. Fixes:2cbc5cd0b5
("watchdog: Add Watchdog Timer driver for RZ/G2L") Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20220225175320.11041-2-biju.das.jz@bp.renesas.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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@ -53,7 +53,7 @@ static void rzg2l_wdt_wait_delay(struct rzg2l_wdt_priv *priv)
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static u32 rzg2l_wdt_get_cycle_usec(unsigned long cycle, u32 wdttime)
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{
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u64 timer_cycle_us = 1024 * 1024 * (wdttime + 1) * MICRO;
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u64 timer_cycle_us = 1024 * 1024ULL * (wdttime + 1) * MICRO;
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return div64_ul(timer_cycle_us, cycle);
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}
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