xhci: remove GFP_DMA flag from allocation

commit 5db851cf20857c5504b146046e97cb7781f2a743 upstream.

There is no reason to restrict allocations to the first 16MB ISA DMA
addresses.

It is causing problems in a virtualization setup with enabled IOMMU
(x86_64). The result is that USB is not working in the VM.

Signed-off-by: Matthias Lange <matthias.lange@kernkonzept.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 709b528..8afb626 100644 (file)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -56,7 +56,7 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci,
        }
 
        if (max_packet) {
-               seg->bounce_buf = kzalloc(max_packet, flags | GFP_DMA);
+               seg->bounce_buf = kzalloc(max_packet, flags);
                if (!seg->bounce_buf) {
                        dma_pool_free(xhci->segment_pool, seg->trbs, dma);
                        kfree(seg);