1 files changed, 17 insertions, 11 deletions

diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 15ce4ab11688..a2d90aca779f 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -240,8 +240,10 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
         memcpy(&endpoint->desc, d, n);
         INIT_LIST_HEAD(&endpoint->urb_list);
 
-        /* Fix up bInterval values outside the legal range. Use 32 ms if no
-         * proper value can be guessed. */
+        /*
+         * Fix up bInterval values outside the legal range.
+         * Use 10 or 8 ms if no proper value can be guessed.
+         */
         i = 0;          /* i = min, j = max, n = default */
         j = 255;
         if (usb_endpoint_xfer_int(d)) {
@@ -250,13 +252,15 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
                 case USB_SPEED_SUPER_PLUS:
                 case USB_SPEED_SUPER:
                 case USB_SPEED_HIGH:
-                        /* Many device manufacturers are using full-speed
+                        /*
+                         * Many device manufacturers are using full-speed
                          * bInterval values in high-speed interrupt endpoint
-                         * descriptors. Try to fix those and fall back to a
-                         * 32 ms default value otherwise. */
+                         * descriptors. Try to fix those and fall back to an
+                         * 8-ms default value otherwise.
+                         */
                         n = fls(d->bInterval*8);
                         if (n == 0)
-                                n = 9;  /* 32 ms = 2^(9-1) uframes */
+                                n = 7;  /* 8 ms = 2^(7-1) uframes */
                         j = 16;
 
                         /*
@@ -271,10 +275,12 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
                         }
                         break;
                 default:                /* USB_SPEED_FULL or _LOW */
-                        /* For low-speed, 10 ms is the official minimum.
+                        /*
+                         * For low-speed, 10 ms is the official minimum.
                          * But some "overclocked" devices might want faster
-                         * polling so we'll allow it. */
-                        n = 32;
+                         * polling so we'll allow it.
+                         */
+                        n = 10;
                         break;
                 }
         } else if (usb_endpoint_xfer_isoc(d)) {
@@ -282,10 +288,10 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
                 j = 16;
                 switch (to_usb_device(ddev)->speed) {
                 case USB_SPEED_HIGH:
-                        n = 9;          /* 32 ms = 2^(9-1) uframes */
+                        n = 7;          /* 8 ms = 2^(7-1) uframes */
                         break;
                 default:                /* USB_SPEED_FULL */
-                        n = 6;          /* 32 ms = 2^(6-1) frames */
+                        n = 4;          /* 8 ms = 2^(4-1) frames */
                         break;
                 }
         }