On 7/23/2015 12:25 PM, Christoph Hellwig wrote:
On Wed, Jul 22, 2015 at 11:30:48AM -0600, Jason Gunthorpe wrote:
On Wed, Jul 22, 2015 at 09:55:40AM +0300, Sagi Grimberg wrote:
+ size += max_t(int, MLX5_UMR_ALIGN - ARCH_KMALLOC_MINALIGN, 0);
+ mr->klms = kzalloc(size, GFP_KERNEL);
+ if (!mr->klms)
+ return -ENOMEM;
+
+ mr->pl_map = dma_map_single(device->dma_device, mr->klms,
+ size, DMA_TO_DEVICE);
This is a misuse of the DMA API, you must call dma_map_single after
the memory is set by the CPU, not before.
The fast reg varient is using coherent allocations, which is OK..
It's fine as long as you dma_sync_*_for_{cpu,device} in the right
places, which is what a lot of drivers do for longer held allocations.
OK. I'll fix that.
Thanks.
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