diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-03-02 23:33:36 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2016-03-16 21:09:08 +0100 |
| commit | ccc8208d0855a5b02a4fc49c141b6f1dbf282304 (patch) | |
| tree | fe95e7e1685fe94fc97697801e759eccb03eac67 /drivers/watchdog | |
| parent | watchdog: s3c2410_wdt: Add max and min timeout values (diff) | |
| download | linux-ccc8208d0855a5b02a4fc49c141b6f1dbf282304.tar.xz linux-ccc8208d0855a5b02a4fc49c141b6f1dbf282304.zip | |
watchdog: atlas7_wdt: test clock rate to avoid division by 0
The clk API may return 0 on clk_get_rate, so we should check the result before
using it as a divisor.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/atlas7_wdt.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/watchdog/atlas7_wdt.c b/drivers/watchdog/atlas7_wdt.c index df6d9242a319..ed80734befae 100644 --- a/drivers/watchdog/atlas7_wdt.c +++ b/drivers/watchdog/atlas7_wdt.c @@ -154,6 +154,11 @@ static int atlas7_wdt_probe(struct platform_device *pdev) writel(0, wdt->base + ATLAS7_WDT_CNT_CTRL); wdt->tick_rate = clk_get_rate(clk); + if (!wdt->tick_rate) { + ret = -EINVAL; + goto err1; + } + wdt->clk = clk; atlas7_wdd.min_timeout = 1; atlas7_wdd.max_timeout = UINT_MAX / wdt->tick_rate; |