net: ethernet: renesas: ravb_main: 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> Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1691,6 +1691,9 @@ static int ravb_set_gti(struct net_device *ndev)
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rate = clk_get_rate(clk);
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clk_put(clk);
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if (!rate)
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return -EINVAL;
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inc = 1000000000ULL << 20;
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do_div(inc, rate);
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