If you have any questions about this, say Y here, only say N
if you know exactly what you are doing.
+config USB_FEW_INIT_RETRIES
+ bool "Limit USB device initialization to only a few retries"
+ help
+ When a new USB device is detected, the kernel tries very hard
+ to initialize and enumerate it, with lots of nested retry loops.
+ This almost always works, but when it fails it can take a long time.
+ This option tells the kernel to make only a few retry attempts,
+ so that the total time required for a failed initialization is
+ no more than 30 seconds (as required by the USB OTG spec).
+
+ Say N here unless you require new-device enumeration failure to
+ occur within 30 seconds (as might be needed in an embedded
+ application).
+
config USB_DYNAMIC_MINORS
bool "Dynamic USB minor allocation"
help
}
+#ifdef CONFIG_USB_FEW_INIT_RETRIES
+#define PORT_RESET_TRIES 2
+#define SET_ADDRESS_TRIES 1
+#define GET_DESCRIPTOR_TRIES 1
+#define GET_MAXPACKET0_TRIES 1
+#define PORT_INIT_TRIES 4
+
+#else
#define PORT_RESET_TRIES 5
#define SET_ADDRESS_TRIES 2
#define GET_DESCRIPTOR_TRIES 2
+#define GET_MAXPACKET0_TRIES 3
#define PORT_INIT_TRIES 4
+#endif /* CONFIG_USB_FEW_INIT_RETRIES */
#define HUB_ROOT_RESET_TIME 60 /* times are in msec */
#define HUB_SHORT_RESET_TIME 10
* 255 is for WUSB devices, we actually need to use
* 512 (WUSB1.0[4.8.1]).
*/
- for (operations = 0; operations < 3; ++operations) {
+ for (operations = 0; operations < GET_MAXPACKET0_TRIES;
+ ++operations) {
buf->bMaxPacketSize0 = 0;
r = usb_control_msg(udev, usb_rcvaddr0pipe(),
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,