1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index c55208299cf8..a12cab5314e9 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -435,6 +435,7 @@ void usb_hub_tt_clear_buffer (struct usb_device *udev, int pipe)
 static void hub_power_on(struct usb_hub *hub)
 {
         int port1;
+        unsigned pgood_delay = hub->descriptor->bPwrOn2PwrGood * 2;
 
         /* if hub supports power switching, enable power on each port */
         if ((hub->descriptor->wHubCharacteristics & HUB_CHAR_LPSM) < 2) {
@@ -444,8 +445,8 @@ static void hub_power_on(struct usb_hub *hub)
                                         USB_PORT_FEAT_POWER);
         }
 
-        /* Wait for power to be enabled */
-        msleep(hub->descriptor->bPwrOn2PwrGood * 2);
+        /* Wait at least 100 msec for power to become stable */
+        msleep(max(pgood_delay, (unsigned) 100));
 }
 
 static void hub_quiesce(struct usb_hub *hub)
@@ -1469,8 +1470,8 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
                 /* return on disconnect or reset */
                 switch (status) {
                 case 0:
-                        /* TRSTRCY = 10 ms */
-                        msleep(10);
+                        /* TRSTRCY = 10 ms; plus some extra */
+                        msleep(10 + 40);
                         /* FALL THROUGH */
                 case -ENOTCONN:
                 case -ENODEV: