[PATCH v2] clk: Use div64_ul instead of do_div

[cgel.zte at gmail.com]

From: Changcheng Deng <deng.changcheng at zte.com.cn>

do_div() does a 64-by-32 division. Here the divisor is an unsigned long
which on some platforms is 64 bit wide. So use div64_ul instead of do_div
to avoid a possible truncation.

Reported-by: Zeal Robot <zealci at zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng at zte.com.cn>
---
 drivers/clk/clk-npcm7xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-npcm7xx.c b/drivers/clk/clk-npcm7xx.c
index e677bb5a784b..c75880af2b74 100644
--- a/drivers/clk/clk-npcm7xx.c
+++ b/drivers/clk/clk-npcm7xx.c
@@ -56,7 +56,7 @@ static unsigned long npcm7xx_clk_pll_recalc_rate(struct clk_hw *hw,
 	otdv2 = FIELD_GET(PLLCON_OTDV2, val);
 
 	ret = (u64)parent_rate * fbdv;
-	do_div(ret, indv * otdv1 * otdv2);
+	ret = div64_ul(ret, indv * otdv1 * otdv2);
 
 	return ret;
 }
-- 
2.25.1