[alsa-devel] [PATCH] ASoC: nau8810: use 64-bit arithmetic instead of 32-bit
Add suffix ULL to constant 256 in order to give the compiler complete information about the proper arithmetic to use.
Signed-off-by: John Hsu KCHSU0@nuvoton.com --- sound/soc/codecs/nau8810.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/codecs/nau8810.c b/sound/soc/codecs/nau8810.c index bfd74b86c9d2..e7fd0b2645ea 100644 --- a/sound/soc/codecs/nau8810.c +++ b/sound/soc/codecs/nau8810.c @@ -505,7 +505,7 @@ static int nau88l0_calc_pll(unsigned int pll_in, f2_max = 0; scal_sel = ARRAY_SIZE(nau8810_mclk_scaler); for (i = 0; i < ARRAY_SIZE(nau8810_mclk_scaler); i++) { - f2 = 256 * fs * 4 * nau8810_mclk_scaler[i] / 10; + f2 = 256ULL * fs * 4 * nau8810_mclk_scaler[i] / 10; if (f2 > NAU_PLL_FREQ_MIN && f2 < NAU_PLL_FREQ_MAX && f2_max < f2) { f2_max = f2;
Do division with div_u64 for the PLL calculation. These errors are fixed and list as follows: 1."__udivdi3" [sound/soc/codecs/snd-soc-nau8810.ko] undefined! 2."__aeabi_uldivmod" [sound/soc/codecs/snd-soc-nau8810.ko] undefined! 3. nau8810.c:(.text.nau8810_calc_pll+0xd8): undefined reference to `__udivdi3'
Signed-off-by: John Hsu KCHSU0@nuvoton.com --- sound/soc/codecs/nau8810.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/nau8810.c b/sound/soc/codecs/nau8810.c index 125e205e6687..dd82c65cfa7f 100644 --- a/sound/soc/codecs/nau8810.c +++ b/sound/soc/codecs/nau8810.c @@ -505,7 +505,8 @@ static int nau8810_calc_pll(unsigned int pll_in, f2_max = 0; scal_sel = ARRAY_SIZE(nau8810_mclk_scaler); for (i = 0; i < ARRAY_SIZE(nau8810_mclk_scaler); i++) { - f2 = 256ULL * fs * 4 * nau8810_mclk_scaler[i] / 10; + f2 = 256ULL * fs * 4 * nau8810_mclk_scaler[i]; + f2 = div_u64(f2, 10); if (f2 > NAU_PLL_FREQ_MIN && f2 < NAU_PLL_FREQ_MAX && f2_max < f2) { f2_max = f2;
The patch
ASoC: nau8810: fix the issue of 64 bits division
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
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.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 3a9ce0f1b2961f6c3ad2a49dcf85449784c18bb5 Mon Sep 17 00:00:00 2001
From: John Hsu KCHSU0@nuvoton.com Date: Fri, 22 Mar 2019 12:25:35 +0800 Subject: [PATCH] ASoC: nau8810: fix the issue of 64 bits division
Do division with div_u64 for the PLL calculation. These errors are fixed and list as follows: 1."__udivdi3" [sound/soc/codecs/snd-soc-nau8810.ko] undefined! 2."__aeabi_uldivmod" [sound/soc/codecs/snd-soc-nau8810.ko] undefined! 3. nau8810.c:(.text.nau8810_calc_pll+0xd8): undefined reference to `__udivdi3'
Signed-off-by: John Hsu KCHSU0@nuvoton.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/nau8810.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/nau8810.c b/sound/soc/codecs/nau8810.c index 125e205e6687..dd82c65cfa7f 100644 --- a/sound/soc/codecs/nau8810.c +++ b/sound/soc/codecs/nau8810.c @@ -505,7 +505,8 @@ static int nau8810_calc_pll(unsigned int pll_in, f2_max = 0; scal_sel = ARRAY_SIZE(nau8810_mclk_scaler); for (i = 0; i < ARRAY_SIZE(nau8810_mclk_scaler); i++) { - f2 = 256ULL * fs * 4 * nau8810_mclk_scaler[i] / 10; + f2 = 256ULL * fs * 4 * nau8810_mclk_scaler[i]; + f2 = div_u64(f2, 10); if (f2 > NAU_PLL_FREQ_MIN && f2 < NAU_PLL_FREQ_MAX && f2_max < f2) { f2_max = f2;
participants (2)
-
John Hsu -
Mark Brown