Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

1 files changed, 14 insertions, 4 deletions

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index c6077d582d29..0f9381b69a3b 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2794,6 +2794,7 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
         int i, status;
         u16 portchange, portstatus;
         struct usb_port *port_dev = hub->ports[port1 - 1];
+        int reset_recovery_time;
 
         if (!hub_is_superspeed(hub->hdev)) {
                 if (warm) {
@@ -2849,7 +2850,9 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
                                         USB_PORT_FEAT_C_BH_PORT_RESET);
                         usb_clear_port_feature(hub->hdev, port1,
                                         USB_PORT_FEAT_C_PORT_LINK_STATE);
-                        usb_clear_port_feature(hub->hdev, port1,
+
+                        if (udev)
+                                usb_clear_port_feature(hub->hdev, port1,
                                         USB_PORT_FEAT_C_CONNECTION);
 
                         /*
@@ -2885,11 +2888,18 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
 
 done:
         if (status == 0) {
-                /* TRSTRCY = 10 ms; plus some extra */
                 if (port_dev->quirks & USB_PORT_QUIRK_FAST_ENUM)
                         usleep_range(10000, 12000);
-                else
-                        msleep(10 + 40);
+                else {
+                        /* TRSTRCY = 10 ms; plus some extra */
+                        reset_recovery_time = 10 + 40;
+
+                        /* Hub needs extra delay after resetting its port. */
+                        if (hub->hdev->quirks & USB_QUIRK_HUB_SLOW_RESET)
+                                reset_recovery_time += 100;
+
+                        msleep(reset_recovery_time);
+                }
 
                 if (udev) {
                         struct usb_hcd *hcd = bus_to_hcd(udev->bus);