1 files changed, 4 insertions, 2 deletions
diff --git a/halfkay.c b/halfkay.c
index cfb10ce..6c41971 100644
--- a/halfkay.c
+++ b/halfkay.c
@@ -40,7 +40,7 @@ enum {
 	HK_USB_VAL = 0x200,
 	TIMEOUT = 2000,
 	TIMEOUT_FIRST = 3000,
-	TRANS_DELAY = 10000,
+	TRANS_DELAY = 4000,
 	TRANS_ATTEMPTS = 10,
 };
 
@@ -80,11 +80,13 @@ static void usbsendcmd(void *data, size_t size, bool firstxfer)
 {
 	unsigned int timeout = firstxfer ? TIMEOUT_FIRST : TIMEOUT;
 	int rc, attempt = 0;
+	useconds_t delay = TRANS_DELAY;
 
 	do {
 		rc = libusb_control_transfer(hk_usb_hnd, HK_USB_REQTYP, HK_USB_REQ,
 					     HK_USB_VAL, 0, data, size, timeout);
-		usleep(TRANS_DELAY);
+		usleep(delay);
+		delay *= 2;
 	} while (rc == LIBUSB_ERROR_PIPE && ++attempt < TRANS_ATTEMPTS);
 
 	if (rc < 0)