The other thread may access other endpoints when the cdns3_check_new_setup
is handling, add spinlock to protect it.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
---
drivers/usb/cdns3/ep0.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c
index 74a1ff5000ba..5aa69980e7ff 100644
--- a/drivers/usb/cdns3/ep0.c
+++ b/drivers/usb/cdns3/ep0.c
@@ -705,15 +705,17 @@ static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
int ret = 0;
u8 zlp = 0;
+ spin_lock_irqsave(&priv_dev->lock, flags);
trace_cdns3_ep0_queue(priv_dev, request);
/* cancel the request if controller receive new SETUP packet. */
- if (cdns3_check_new_setup(priv_dev))
+ if (cdns3_check_new_setup(priv_dev)) {
+ spin_unlock_irqrestore(&priv_dev->lock, flags);
return -ECONNRESET;
+ }
/* send STATUS stage. Should be called only for SET_CONFIGURATION */
if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) {
- spin_lock_irqsave(&priv_dev->lock, flags);
cdns3_select_ep(priv_dev, 0x00);
erdy_sent = !priv_dev->hw_configured_flag;
@@ -738,7 +740,6 @@ static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
return 0;
}
- spin_lock_irqsave(&priv_dev->lock, flags);
if (!list_empty(&priv_ep->pending_req_list)) {
dev_err(priv_dev->dev,
"can't handle multiple requests for ep0\n");
--
2.17.1
