| Date | Sat, 19 Feb 2022 08:19:00 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH 22/22] mtd: rawnand: Use dma_alloc_noncoherent() for dma buffer |
| |
On Sat, Feb 19, 2022 at 08:52:21AM +0800, Baoquan He wrote: > Use dma_alloc_noncoherent() instead of directly allocating buffer > from kmalloc with GFP_DMA. DMA API will try to allocate buffer > depending on devices addressing limitation.
I think it would be better to still allocate the buffer at allocation time and then just transfer ownership using dma_sync_single* in the I/O path to avoid the GFP_ATOMIC allocation.
|