linux-kernel - Re: [PATCH -next] dmaengine: hisilicon: Fix build error without PCI

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Date:   Mon, 30 Mar 2020 14:59:09 +0800
From:   Yuehaibing <yuehaibing@...wei.com>
To:     Zhou Wang <wangzhou1@...ilicon.com>, <dan.j.williams@...el.com>,
        <vkoul@...nel.org>, <qiuzhenfa@...ilicon.com>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] dmaengine: hisilicon: Fix build error without
 PCI_MSI

On 2020/3/30 10:39, Zhou Wang wrote:
> On 2020/3/28 19:41, YueHaibing wrote:
>> If PCI_MSI is not set, building fais:
>>
>> drivers/dma/hisi_dma.c: In function ‘hisi_dma_free_irq_vectors’:
>> drivers/dma/hisi_dma.c:138:2: error: implicit declaration of function ‘pci_free_irq_vectors’;
>>  did you mean ‘pci_alloc_irq_vectors’? [-Werror=implicit-function-declaration]
>>   pci_free_irq_vectors(data);
>>   ^~~~~~~~~~~~~~~~~~~~
>>
>> Make HISI_DMA depends on PCI_MSI to fix this.
> 
> In ARM64, it will appear this compile error if PCI disables.
> How about adding depends on PCI && PCI_MSI here?

PCI_MSI depends on PCI， while PCI is not set, PCI_MSI will never be set

so depends on PCI_MSI is enough.

> 
> Best,
> Zhou
> 
>>
>> Fixes: e9f08b65250d ("dmaengine: hisilicon: Add Kunpeng DMA engine support")
>> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
>> ---
>>  drivers/dma/Kconfig | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
>> index 092483644315..023db6883d05 100644
>> --- a/drivers/dma/Kconfig
>> +++ b/drivers/dma/Kconfig
>> @@ -241,7 +241,8 @@ config FSL_RAID
>>  
>>  config HISI_DMA
>>  	tristate "HiSilicon DMA Engine support"
>> -	depends on ARM64 || (COMPILE_TEST && PCI_MSI)
>> +	depends on ARM64 || COMPILE_TEST
>> +	depends on PCI_MSI
>>  	select DMA_ENGINE
>>  	select DMA_VIRTUAL_CHANNELS
>>  	help
>>
> 
> 
> .
>