diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index d024d47c86d1..87d0cfb7b29e 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -224,6 +224,10 @@ static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,
 
 	evt->dwc	= dwc;
 	evt->length	= length;
+	evt->cache	= devm_kzalloc(dwc->dev, length, GFP_KERNEL);
+	if (!evt->cache)
+		return ERR_PTR(-ENOMEM);
+
 	evt->buf	= dma_alloc_coherent(dwc->dev, length,
 			&evt->dma, GFP_KERNEL);
 	if (!evt->buf)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 354de247356a..bf63756bc176 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -472,6 +472,7 @@ struct dwc3_trb;
 /**
  * struct dwc3_event_buffer - Software event buffer representation
  * @buf: _THE_ buffer
+ * @cache: The buffer cache used in the threaded interrupt
  * @length: size of this buffer
  * @lpos: event offset
  * @count: cache of last read event count register
@@ -481,6 +482,7 @@ struct dwc3_trb;
  */
 struct dwc3_event_buffer {
 	void			*buf;
+	void			*cache;
 	unsigned		length;
 	unsigned int		lpos;
 	unsigned int		count;