1 files changed, 7 insertions, 0 deletions

diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c
index af11d7d842..8aa2d02ab7 100644
--- a/firmware/target/arm/as3525/system-as3525.c
+++ b/firmware/target/arm/as3525/system-as3525.c
@@ -50,7 +50,9 @@
 #define default_interrupt(name) \
   extern __attribute__((weak,alias("UIRQ"))) void name (void)
 
+#if CONFIG_USBOTG != USBOTG_DESIGNWARE
 static void UIRQ (void) __attribute__((interrupt ("IRQ")));
+#endif
 void irq_handler(void) __attribute__((naked, interrupt ("IRQ")));
 void fiq_handler(void) __attribute__((interrupt ("FIQ")));
 
@@ -105,6 +107,11 @@ static void UIRQ(void)
     if(status == 0)
     {
         status = VIC_RAW_INTR; /* masked interrupts */
+#if CONFIG_USBOTG == USBOTG_DESIGNWARE
+        /* spurious interrupts from USB are expected */
+        if (status & INTERRUPT_USB)
+            return;
+#endif
         masked = true;
     }