From: Shawn Guo Date: Mon, 28 Jan 2013 06:25:43 +0000 (+0800) Subject: ASoC: fsl: fix snd-soc-imx-pcm module build X-Git-Tag: v3.8-rc7~10^2^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1927661b1748480692f1fa2c390fe031c86d862a;p=pandora-kernel.git ASoC: fsl: fix snd-soc-imx-pcm module build When building modules with CONFIG_SND_IMX_SOC=m in imx_v6_v7_defconfig, we will see the following link error. LD [M] sound/soc/fsl/snd-soc-fsl-ssi.o LD [M] sound/soc/fsl/snd-soc-fsl-utils.o LD [M] sound/soc/fsl/snd-soc-imx-ssi.o LD [M] sound/soc/fsl/snd-soc-imx-audmux.o LD [M] sound/soc/fsl/snd-soc-imx-pcm.o sound/soc/fsl/imx-pcm-dma.o: In function `init_module': imx-pcm-dma.c:(.init.text+0x0): multiple definition of `init_module' sound/soc/fsl/imx-pcm-fiq.o:imx-pcm-fiq.c:(.init.text+0x0): first defined here sound/soc/fsl/imx-pcm-dma.o: In function `cleanup_module': imx-pcm-dma.c:(.exit.text+0x0): multiple definition of `cleanup_module' sound/soc/fsl/imx-pcm-fiq.o:imx-pcm-fiq.c:(.exit.text+0x0): first defined here make[4]: *** [sound/soc/fsl/snd-soc-imx-pcm.o] Error 1 The module snd-soc-imx-pcm is designed to link imx-pcm.o with imx-pcm-dma.o or imx-pcm-fiq.o depending on if option SND_SOC_IMX_PCM_DMA or SND_SOC_IMX_PCM_FIQ is enabled. Both imx-pcm-dma and imx-pcm-fiq register their own module_platform_driver. However, these two options are not mutually exclusive and can be enabled together. And that's why we see above multiple init_module definition error. Instead of having both imx-pcm-dma and imx-pcm-fiq register their own platform_driver, we should do only once in imx-pcm.c. Using platform_device_id to distinguish between imx-pcm-dma and imx-pcm-fiq, we can run-time call imx-pcm-dma/fiq specific initialization in .probe hook to have module snd-soc-imx-pcm work for both cases. Signed-off-by: Shawn Guo Signed-off-by: Mark Brown --- Reading git-diff-tree failed