Applied "ASoC: pxa: remove incorrect do_div() call" to the asoc tree

Message ID E1ZzqIK-0003tw-5D@debutante
State New
Headers show

Commit Message

Mark Brown Nov. 20, 2015, 6:20 p.m.
The patch

   ASoC: pxa: remove incorrect do_div() call

has been applied to the asoc tree at


All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

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From d1afdf34fc17bd2e1c96dc6196c562fa8906a026 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <>

Date: Fri, 20 Nov 2015 10:32:44 +0100
Subject: [PATCH] ASoC: pxa: remove incorrect do_div() call

The new optimized do_div implementation (now in asm-generic/next) exposes a
glitch in the brownstone audio driver by producing a compile-time warning:

sound/soc/pxa/brownstone.c: In function 'brownstone_wm8994_hw_params':
sound/soc/pxa/brownstone.c:67:85: warning: comparison of distinct pointer types lacks a cast
sound/soc/pxa/brownstone.c:67:10125: warning: right shift count >= width of type [-Wshift-count-overflow]
sound/soc/pxa/brownstone.c:67:10254: warning: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]

The driver just divides two plain integer values, so it should not
use do_div to start with, but has apparently done so ever since the
code was first merged. This replaces do_div with a simple division

Signed-off-by: Arnd Bergmann <>

Signed-off-by: Mark Brown <>

 sound/soc/pxa/brownstone.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)


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diff --git a/sound/soc/pxa/brownstone.c b/sound/soc/pxa/brownstone.c
index 6147e86e9b0f..416ea646c3b1 100644
--- a/sound/soc/pxa/brownstone.c
+++ b/sound/soc/pxa/brownstone.c
@@ -63,8 +63,7 @@  static int brownstone_wm8994_hw_params(struct snd_pcm_substream *substream,
 		sysclk    = params_rate(params) * 512;
 		sspa_mclk = params_rate(params) * 64;
-	sspa_div = freq_out;
-	do_div(sspa_div, sspa_mclk);
+	sspa_div = freq_out / sspa_mclk;
 	snd_soc_dai_set_sysclk(cpu_dai, MMP_SSPA_CLK_AUDIO, freq_out, 0);
 	snd_soc_dai_set_pll(cpu_dai, MMP_SYSCLK, 0, freq_out, sysclk);