| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.16 170/272] watchdog: sprd_wdt: Fix error handling in sprd_wdt_enable() | Date | Mon, 28 May 2018 12:03:23 +0200 |
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4.16-stable review patch. If anyone has any objections, please let me know.
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From: Alexey Khoroshilov <khoroshilov@ispras.ru>
[ Upstream commit 3c578cd4bc52b6e65d65be1abad9a8aa489ec207 ]
If clk_prepare_enable(wdt->rtc_enable) fails, wdt->enable clock is left enabled.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/watchdog/sprd_wdt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/watchdog/sprd_wdt.c +++ b/drivers/watchdog/sprd_wdt.c @@ -154,8 +154,10 @@ static int sprd_wdt_enable(struct sprd_w if (ret) return ret; ret = clk_prepare_enable(wdt->rtc_enable); - if (ret) + if (ret) { + clk_disable_unprepare(wdt->enable); return ret; + } sprd_wdt_unlock(wdt->base); val = readl_relaxed(wdt->base + SPRD_WDT_CTRL);
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