On Wed, Jan 9, 2013 at 1:00 PM, Eric W. Biederman <[email protected]> wrote:
> Yinghai Lu <[email protected]> writes:
>
>> please check updated attached. It should address all your request.
>
> There is one significant bug that I can see.
>
> swiotlb_print_info tests no_iotlb_memory but no_iotlb_memory is set
> after swiotlb_init_with_tlb returns.
there is another swiotlb_print_info calling from
pci_swiotlb_late_init
void __init pci_swiotlb_late_init(void)
{
/* An IOMMU turned us off. */
if (!swiotlb)
swiotlb_free();
else {
printk(KERN_INFO "PCI-DMA: "
"Using software bounce buffering for IO (SWIOTLB)\n");
swiotlb_print_info();
}
}
so we need that checking when swiotlb == 1, but actually we can not
allocate that before.
Thanks
Yinghai
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