From 24b1faffde60e120edc3bb0a5a2c849a63b5056f Mon Sep 17 00:00:00 2001
From: Benjamin Berg <bberg@redhat.com>
Date: Wed, 3 Jun 2020 00:03:56 +0200
Subject: [PATCH] upeksonly: Add a comment that multiple URBs are needed

---
 libfprint/drivers/upeksonly.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libfprint/drivers/upeksonly.c b/libfprint/drivers/upeksonly.c
index 52754c5..795ad2e 100644
--- a/libfprint/drivers/upeksonly.c
+++ b/libfprint/drivers/upeksonly.c
@@ -1403,6 +1403,9 @@ dev_activate (FpImageDevice *dev)
   self->num_flying = 0;
   self->img_transfers = g_ptr_array_new_with_free_func ((GFreeFunc) fpi_usb_transfer_unref);
 
+  /* This might seem odd, but we do need multiple in-flight URBs so that
+   * we never stop polling the device for more data.
+   */
   for (i = 0; i < NUM_BULK_TRANSFERS; i++)
     {
       FpiUsbTransfer *transfer;