Re: [PATCH 4/5] scsi: megaraid_sas - preallocate memory for ioctlprocessing

[James Bottomley]

On Wed, 2007-02-07 at 13:30 -0800, Andrew Morton wrote:
> I suspect all this horror is due to stupidity in the DMA API.
> 
> pci_alloc_consistent() just goes and assumes GFP_ATOMIC, whereas
> the caller (megasas_mgmt_fw_ioctl) would have been perfectly happy
> to use GFP_KERNEL.
> 
> I bet this fixes it

It does, but the DMA API was expanded to cope with this exact case, so
use dma_alloc_coherent() directly in the megaraid code instead.  The dev
is just &pci_dev->dev.

James


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