From 2659e2df31e592d74d6dd264a4f5ce242c6369c8 Mon Sep 17 00:00:00 2001
From: "jvde.github" <jvde.github@gmail.com>
Date: Sat, 8 Jan 2022 13:30:34 +0100
Subject: [PATCH] lib: force wait state after cancel of usb transfer

..and before handling usb events

This avoids an occasional crash when closing the device on Windows.
Also see https://github.com/libusb/libusb/issues/1043.
---
 src/librtlsdr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/librtlsdr.c b/src/librtlsdr.c
index 0146298..2682d77 100644
--- a/src/librtlsdr.c
+++ b/src/librtlsdr.c
@@ -1930,6 +1930,9 @@ int rtlsdr_read_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx,
 					/* handle events after canceling
 					 * to allow transfer status to
 					 * propagate */
+#ifdef _WIN32
+					Sleep(1);
+#endif
 					libusb_handle_events_timeout_completed(dev->ctx,
 									       &zerotv, NULL);
 					if (r < 0)