Re: [PATCH V6 2/3] dma-mapping: Rework dma_get_cache_alignment()function

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Hi, Christoph,

I have changed dma_get_cache_alignment's return value, and I don't know whether those drivers want to return ARCH_DMA_MINALIGN unconditionally. So I pass a NULL for those drivers, in order to keep their old behavior.
 
Huacai
 
------------------ Original ------------------
From:  "Christoph Hellwig"<hch@xxxxxx>;
Date:  Tue, Sep 19, 2017 11:02 PM
To:  "Huacai Chen"<chenhc@xxxxxxxxxx>; 
Cc:  "Christoph Hellwig"<hch@xxxxxx>; "Marek Szyprowski"<m.szyprowski@xxxxxxxxxxx>; "Robin Murphy"<robin.murphy@xxxxxxx>; "Andrew Morton"<akpm@xxxxxxxxxxxxxxxxxxxx>; "Fuxin Zhang"<zhangfx@xxxxxxxxxx>; "linux-kernel"<linux-kernel@xxxxxxxxxxxxxxx>; "James E . J . Bottomley"<jejb@xxxxxxxxxxxxxxxxxx>; "Martin K . Petersen"<martin.petersen@xxxxxxxxxx>; "linux-scsi"<linux-scsi@xxxxxxxxxxxxxxx>; "stable"<stable@xxxxxxxxxxxxxxx>; 
Subject:  Re: [PATCH V6 2/3] dma-mapping: Rework dma_get_cache_alignment()function

 
>  	mdev->limits.reserved_mtts = ALIGN(mdev->limits.reserved_mtts * mdev->limits.mtt_seg_size,
> -					   dma_get_cache_alignment()) / mdev->limits.mtt_seg_size;
> +					   dma_get_cache_alignment(NULL)) / mdev->limits.mtt_seg_size;
>  
>  	mdev->mr_table.mtt_table = mthca_alloc_icm_table(mdev, init_hca->mtt_base,

Please pass the actually relevant struct device for each call.