1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 36cbe2226a44..6b70e7fb484c 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2141,7 +2141,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
         unsigned int    val, val2;
         u64             val_64;
         struct xhci_segment     *seg;
-        u32 page_size;
+        u32 page_size, temp;
         int i;
 
         page_size = xhci_readl(xhci, &xhci->op_regs->page_size);
@@ -2324,6 +2324,15 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 
         INIT_LIST_HEAD(&xhci->lpm_failed_devs);
 
+        /* Enable USB 3.0 device notifications for function remote wake, which
+         * is necessary for allowing USB 3.0 devices to do remote wakeup from
+         * U3 (device suspend).
+         */
+        temp = xhci_readl(xhci, &xhci->op_regs->dev_notification);
+        temp &= ~DEV_NOTE_MASK;
+        temp |= DEV_NOTE_FWAKE;
+        xhci_writel(xhci, temp, &xhci->op_regs->dev_notification);
+
         return 0;
 
 fail: