[PATCH 6/6] watchdog: tangox_wdt: test clock rate to avoid division by 0

[Wolfram Sang]

From: Wolfram Sang <wsa+rene...@sang-engineering.com>

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+rene...@sang-engineering.com>
---

Should go individually via subsystem tree.

 drivers/watchdog/tangox_wdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/watchdog/tangox_wdt.c b/drivers/watchdog/tangox_wdt.c
index 709c1ed6fd79b9..cc702718ae4dbb 100644
--- a/drivers/watchdog/tangox_wdt.c
+++ b/drivers/watchdog/tangox_wdt.c
@@ -139,6 +139,8 @@ static int tangox_wdt_probe(struct platform_device *pdev)
                return err;
 
        dev->clk_rate = clk_get_rate(dev->clk);
+       if (!dev->clk_rate)
+               return -EINVAL;
 
        dev->wdt.parent = &pdev->dev;
        dev->wdt.info = &tangox_wdt_info;
-- 
2.7.0