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ide: palm_bk3710: test clock rate to avoid division by 0

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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: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wolfram Sang 2016-03-02 23:33:32 +01:00 committed by David S. Miller
parent eccf432f65
commit 0d7ef45cde
1 changed files with 2 additions and 0 deletions
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drivers/ide/palm_bk3710.c
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@ -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;