linux-kernel - Re: [PATCH] ASoC: SOF: Intel: hda: Fix COMPILE

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Date:   Fri, 31 May 2019 16:34:17 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     <lgirdwood@...il.com>, <broonie@...nel.org>,
        <pierre-louis.bossart@...ux.intel.com>,
        <yingjiang.zhu@...ux.intel.com>, <perex@...ex.cz>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: SOF: Intel: hda: Fix COMPILE_TEST build error

On Fri, 31 May 2019 16:25:26 +0200,
YueHaibing wrote:
> 
> while building without PCI:
> 
> sound/soc/sof/intel/hda.o: In function `hda_dsp_probe':
> hda.c:(.text+0x79c): undefined reference to `pci_ioremap_bar'
> hda.c:(.text+0x79c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `pci_ioremap_bar'
> hda.c:(.text+0x7c4): undefined reference to `pci_ioremap_bar'
> hda.c:(.text+0x7c4): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `pci_ioremap_bar'
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Fixes: e13ef82a9ab8 ("ASoC: SOF: add COMPILE_TEST for PCI options")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  sound/soc/sof/intel/hda.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
> index 68db2ac..c1703c4 100644
> --- a/sound/soc/sof/intel/hda.c
> +++ b/sound/soc/sof/intel/hda.c
> @@ -231,7 +231,9 @@ static int hda_init(struct snd_sof_dev *sdev)
>  
>  	/* initialise hdac bus */
>  	bus->addr = pci_resource_start(pci, 0);
> +#if IS_ENABLED(CONFIG_PCI)
>  	bus->remap_addr = pci_ioremap_bar(pci, 0);
> +#endif
>  	if (!bus->remap_addr) {
>  		dev_err(bus->dev, "error: ioremap error\n");
>  		return -ENXIO;
> @@ -458,7 +460,9 @@ int hda_dsp_probe(struct snd_sof_dev *sdev)
>  		goto hdac_bus_unmap;
>  
>  	/* DSP base */
> +#if IS_ENABLED(CONFIG_PCI)
>  	sdev->bar[HDA_DSP_BAR] = pci_ioremap_bar(pci, HDA_DSP_BAR);
> +#endif
>  	if (!sdev->bar[HDA_DSP_BAR]) {
>  		dev_err(sdev->dev, "error: ioremap error\n");
>  		ret = -ENXIO;

IMO, this should be better addressed by fixing in linux/pci.h
instead, something like below (totally untested).


thanks,

Takashi

--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2005,8 +2005,19 @@ static inline void pci_mmcfg_late_init(void) { }
 
 int pci_ext_cfg_avail(void);
 
+#ifdef CONFIG_PCI
 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
+#else
+static inline void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar)
+{
+	return NULL;
+}
+static inline void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar)
+{
+	return NULL;
+}
+#endif
 
 #ifdef CONFIG_PCI_IOV
 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);