Re: [PATCH] ASoC: SOF: Fix build error with CONFIG_SND_SOC_SOF_NOCODEC=m

From: Pierre-Louis Bossart
Date: Fri May 10 2019 - 08:58:12 EST

On 5/10/19 2:12 AM, Takashi Iwai wrote:
On Fri, 10 May 2019 04:36:57 +0200,
YueHaibing wrote:

Fix gcc build error while CONFIG_SND_SOC_SOF_NOCODEC=m

sound/soc/sof/core.o: In function `snd_sof_device_probe':
core.c:(.text+0x4af): undefined reference to `sof_nocodec_setup'

Change SND_SOC_SOF_NOCODEC to bool to fix this.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Fixes: c16211d6226d ("ASoC: SOF: Add Sound Open Firmware driver core")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>

This change would break things severely. This won't allow to build it
as a module any longer.

Isn't this fixed already?
See the patch 'ASoC: SOF: core: fix undefined nocodec reference' and Takashi's follow-up to fix the unused variable warning.

A better fix would be to somehow restrict the SND_SOC_SOF_NOCODEC to
align with SND_SOC_SOF, i.e. disallow SND_SOC_SOF=y &&
SND_SOC_SOF_NOCODEC=m. Because of the complex mix of select and
depends-on in SOF, I'm afraid that it's not that trivial, though.
There might be something I overlooked, hopefully...

An easier alternative would be to replace
IS_REACHABLE(CONFIG_SND_SOC_SOF_NOCODEC). This assures the condition
at the build time, although the error at probe might be a surprising
to some users that don't know this hidden dependency.



sound/soc/sof/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig
index b204c65..9c280c9 100644
--- a/sound/soc/sof/Kconfig
+++ b/sound/soc/sof/Kconfig
@@ -44,7 +44,7 @@ config SND_SOC_SOF_OPTIONS
- tristate "SOF nocodec mode Support"
+ bool "SOF nocodec mode Support"
This adds support for a dummy/nocodec machine driver fallback
option if no known codec is detected. This is typically only