[PATCH QEMU HCI-8.0 v8 09/14] usb-host: factor out usb_host_start_events() #VSTOR-137800

[Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>]

usb_host_init() registers the libusb pollfd notifiers and hands libusb's
current fds to the QEMU main loop so URB completions get reaped.  Move
that into a helper so the CPR hand-off code can reuse it to resume reaping
after a switchover.  No functional change.

Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
---
 hw/usb/host-libusb.c | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index 6c00ce528b1..70ae0a38167 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -265,6 +265,24 @@ static void usb_host_del_fd(int fd, void *user_data)
     qemu_set_fd_handler(fd, NULL, NULL, NULL);
 }
 
+/*
+ * Register the libusb event callbacks and hand its current fds to the QEMU
+ * main loop, so URB completions start getting reaped.
+ */
+static void usb_host_start_events(void)
+{
+    const struct libusb_pollfd **poll;
+
+    libusb_set_pollfd_notifiers(ctx, usb_host_add_fd, usb_host_del_fd, ctx);
+    poll = libusb_get_pollfds(ctx);
+    if (poll) {
+        for (int i = 0; poll[i] != NULL; i++) {
+            usb_host_add_fd(poll[i]->fd, poll[i]->events, ctx);
+        }
+        free(poll);
+    }
+}
+
 #else
 
 static QEMUTimer *poll_timer;
@@ -292,9 +310,6 @@ static void usb_host_timer(void *opaque)
 
 static int usb_host_init(void)
 {
-#ifndef CONFIG_WIN32
-    const struct libusb_pollfd **poll;
-#endif
     int rc;
 
     if (ctx) {
@@ -313,17 +328,7 @@ static int usb_host_init(void)
     poll_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, usb_host_timer, NULL);
     usb_host_timer_kick();
 #else
-    libusb_set_pollfd_notifiers(ctx, usb_host_add_fd,
-                                usb_host_del_fd,
-                                ctx);
-    poll = libusb_get_pollfds(ctx);
-    if (poll) {
-        int i;
-        for (i = 0; poll[i] != NULL; i++) {
-            usb_host_add_fd(poll[i]->fd, poll[i]->events, ctx);
-        }
-    }
-    free(poll);
+    usb_host_start_events();
 #endif
     return 0;
 }

-- 
2.47.1