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

2017-09-21 Thread Christoph Hellwig
On Thu, Sep 21, 2017 at 12:28:25PM +0800, 陈华才 wrote: > 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.

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

2017-09-20 Thread 陈华才
J . Bottomley"; "Martin K . Petersen"; "linux-scsi"; "stable"; Subject: Re: [PATCH V6 2/3] dma-mapping: Rework dma_get_cache_alignment()function > mdev->limits.reserved_mtts = ALIGN(mdev->limits.reserve

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

2017-09-19 Thread Christoph Hellwig
> 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

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

2017-09-19 Thread Huacai Chen
Make dma_get_cache_alignment() to accept a 'dev' argument. As a result, it can return different alignments due to different devices' I/O cache coherency. For compatibility, make all existing callers pass a NULL dev argument. Cc: sta...@vger.kernel.org Signed-off-by: Huacai Chen --- drivers/infin