X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fclk%2Fclk-fractional-divider.c;h=6aa72d9d79bad43d5c8f79f47fa30134d710a624;hb=6724af486903df57338c14424e02599e371cf563;hp=82a59d0086cc79d654c4ceaf4aa42a8491467dbc;hpb=a99abce2d92dd21faffc9439fa35d1519627872b;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
index 82a59d0086cc..6aa72d9d79ba 100644
--- a/drivers/clk/clk-fractional-divider.c
+++ b/drivers/clk/clk-fractional-divider.c
@@ -36,6 +36,9 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw,
 	m = (val & fd->mmask) >> fd->mshift;
 	n = (val & fd->nmask) >> fd->nshift;
 
+	if (!n || !m)
+		return parent_rate;
+
 	ret = (u64)parent_rate * m;
 	do_div(ret, n);