[PATCH 5/6] xhci: Use device_iommu_mapped()

From: Joerg Roedel <redacted>

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>
Signed-off-by: Joerg Roedel <redacted>
---
  drivers/usb/host/xhci.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index dae3be1b9c8f..8eacd2ed412b 100644
--- 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");