xhci: Use device_iommu_mapped()

Replace the dev->iommu_group check with a proper function
call that better reprensents its purpose.

Cc: Mathias Nyman <mathias.nyman@intel.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 0420eef..6216e82 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -244,7 +244,7 @@ static void xhci_zero_64b_regs(struct xhci_hcd *xhci)
         * an iommu. Doing anything when there is no iommu is definitely
         * unsafe...
         */
-       if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !dev->iommu_group)
+       if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !device_iommu_mapped(dev))
                return;
 
        xhci_info(xhci, "Zeroing 64bit base registers, expecting fault\n");