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Date: Wed, 17 Jun 2020 21:24:14 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Rikard Falkeborn <rikard.falkeborn@...il.com>,
Maxime Ripard <maxime@...no.tech>,
Sasha Levin <sashal@...nel.org>, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 4.14 002/108] clk: sunxi: Fix incorrect usage of round_down()
From: Rikard Falkeborn <rikard.falkeborn@...il.com>
[ Upstream commit ee25d9742dabed3fd18158b518f846abeb70f319 ]
round_down() can only round to powers of 2. If round_down() is asked
to round to something that is not a power of 2, incorrect results are
produced. The incorrect results can be both too large and too small.
Instead, use rounddown() which can round to any number.
Fixes: 6a721db180a2 ("clk: sunxi: Add A31 clocks support")
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/clk/sunxi/clk-sunxi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index aa4add580516..0b5e091742f9 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -98,7 +98,7 @@ static void sun6i_a31_get_pll1_factors(struct factors_request *req)
* Round down the frequency to the closest multiple of either
* 6 or 16
*/
- u32 round_freq_6 = round_down(freq_mhz, 6);
+ u32 round_freq_6 = rounddown(freq_mhz, 6);
u32 round_freq_16 = round_down(freq_mhz, 16);
if (round_freq_6 > round_freq_16)
--
2.25.1
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