From: Zdenek Dohnal <zdohnal@redhat.com>
Date: Tue, 13 Apr 2021 15:44:14 +0200
Subject: backend/usb-libusb.c: Use 60s timeout for reading at backchannel

Some older models malfunction if timeout is too short.

Origin: upstream, https://github.com/OpenPrinting/cups/pull/174
Bug: https://github.com/OpenPrinting/cups/issues/160
Bug-Debian: https://bugs.debian.org/989073
---
 backend/usb-libusb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/usb-libusb.c b/backend/usb-libusb.c
index d6b0eb4..fbb0d9d 100644
--- a/backend/usb-libusb.c
+++ b/backend/usb-libusb.c
@@ -1704,7 +1704,7 @@ static void *read_thread(void *reference)
     readstatus = libusb_bulk_transfer(g.printer->handle,
 				      g.printer->read_endp,
 				      readbuffer, rbytes,
-				      &rbytes, 250);
+				      &rbytes, 60000);
     if (readstatus == LIBUSB_SUCCESS && rbytes > 0)
     {
       fprintf(stderr, "DEBUG: Read %d bytes of back-channel data...\n", (int)rbytes);