[PATCH 1/6] ide: palm_bk3710: 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/ide/palm_bk3710.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/ide/palm_bk3710.c b/drivers/ide/palm_bk3710.c
index 8012e43bf8f618..46427ea01753b4 100644
--- a/drivers/ide/palm_bk3710.c
+++ b/drivers/ide/palm_bk3710.c
@@ -325,6 +325,8 @@ static int __init palm_bk3710_probe(struct platform_device 
*pdev)
 
        clk_enable(clk);
        rate = clk_get_rate(clk);
+       if (!rate)
+               return -EINVAL;
 
        /* NOTE:  round *down* to meet minimum timings; we count in clocks */
        ideclk_period = 1000000000UL / rate;
-- 
2.7.0