From e23cc9bd6c5434f36dd7a3de7437c7316e97f265 Mon Sep 17 00:00:00 2001
From: Ben Gamari <bgamari.foss@gmail.com>
Date: Sun, 7 Jul 2013 21:25:31 -0400
Subject: [PATCH] usb_queue: Disable interrupts when allocating transfer

---
 firmware/hackrf_usb/usb_queue.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/firmware/hackrf_usb/usb_queue.c b/firmware/hackrf_usb/usb_queue.c
index 0341150a..ea6c2980 100644
--- a/firmware/hackrf_usb/usb_queue.c
+++ b/firmware/hackrf_usb/usb_queue.c
@@ -62,8 +62,10 @@ void usb_queue_init() {
 static usb_transfer_t* allocate_transfer()
 {
         while (free_transfers == NULL);
+        cm_disable_interrupts();
         usb_transfer_t* const transfer = free_transfers;
         free_transfers = transfer->next;
+        cm_enable_interrupts();
         return transfer;
 }