USB: remove short initial timeout for device descriptor fetch

This patch (as905) removes a micro-optimization from the hub port
initialization code.  Previously we had been using a short timeout on
the first attempt the read the device descriptor; now we will use the
standard timeout length.

It's not clear that the short timeout ever provided any benefit.  And
now we know of one case where it actually hurts: The device can't meet
the short timeout and then it gets terminally confused.

This fixes Bugzilla #8444.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index f6b74a678de51f853e639c3fa7bcca80146021fd..6a6e4f8c69ba5b9efa911e88ff85f0d345c9d657 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2201,14 +2201,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
                                continue;
                        }
 
-                       /* Use a short timeout the first time through,
-                        * so that recalcitrant full-speed devices with
-                        * 8- or 16-byte ep0-maxpackets won't slow things
-                        * down tremendously by NAKing the unexpectedly
-                        * early status stage.  Also, retry on all errors;
-                        * some devices are flakey.
-                        * 255 is for WUSB devices, we actually need to use 512.
-                        * WUSB1.0[4.8.1].
+                       /* Retry on all errors; some devices are flakey.
+                        * 255 is for WUSB devices, we actually need to use
+                        * 512 (WUSB1.0[4.8.1]).
                         */
                        for (j = 0; j < 3; ++j) {
                                buf->bMaxPacketSize0 = 0;
@@ -2216,7 +2211,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
                                        USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
                                        USB_DT_DEVICE << 8, 0,
                                        buf, GET_DESCRIPTOR_BUFSIZE,
-                                       (i ? USB_CTRL_GET_TIMEOUT : 1000));
+                                       USB_CTRL_GET_TIMEOUT);
                                switch (buf->bMaxPacketSize0) {
                                case 8: case 16: case 32: case 64: case 255:
                                        if (buf->bDescriptorType ==