From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxxxx> Acked-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx> --- The original patch was marked as "NOT APPLICABLE" in patchwork. I reviewed again and can't see why. So, in case this remains true, please explain. drivers/net/ethernet/renesas/ravb_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 4e1a7dba7c4abb..791930b63991dc 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1691,6 +1691,9 @@ static int ravb_set_gti(struct net_device *ndev) rate = clk_get_rate(clk); clk_put(clk); + if (!rate) + return -EINVAL; + inc = 1000000000ULL << 20; do_div(inc, rate); -- 2.7.0
