From 576418e3417267e93ffee09c46f56434108c4548 Mon Sep 17 00:00:00 2001 From: Biju Das Date: Thu, 24 Aug 2023 11:48:10 +0100 Subject: [PATCH] clk: vc3: Fix 64 by 64 division Fix the below cocci warnings by replacing do_div()->div64_ul() and bound the result with a max value of U16_MAX. cocci warnings: drivers/clk/clk-versaclock3.c:404:2-8: WARNING: do_div() does a 64-by-32 division, please consider using div64_ul instead. Reported-by: Julia Lawall Closes: https://lore.kernel.org/r/202307270841.yr5HxYIl-lkp@intel.com/ Fixes: 6e9aff555db7 ("clk: Add support for versa3 clock driver") Signed-off-by: Biju Das Link: https://lore.kernel.org/r/20230824104812.147775-3-biju.das.jz@bp.renesas.com Signed-off-by: Stephen Boyd --- drivers/clk/clk-versaclock3.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/clk/clk-versaclock3.c b/drivers/clk/clk-versaclock3.c index 7ab2447..b1a94db 100644 --- a/drivers/clk/clk-versaclock3.c +++ b/drivers/clk/clk-versaclock3.c @@ -401,11 +401,10 @@ static long vc3_pll_round_rate(struct clk_hw *hw, unsigned long rate, /* Determine best fractional part, which is 16 bit wide */ div_frc = rate % *parent_rate; div_frc *= BIT(16) - 1; - do_div(div_frc, *parent_rate); - vc3->div_frc = (u32)div_frc; + vc3->div_frc = min_t(u64, div64_ul(div_frc, *parent_rate), U16_MAX); rate = (*parent_rate * - (vc3->div_int * VC3_2_POW_16 + div_frc) / VC3_2_POW_16); + (vc3->div_int * VC3_2_POW_16 + vc3->div_frc) / VC3_2_POW_16); } else { rate = *parent_rate * vc3->div_int; } -- 2.7.4