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usb: cdns3: ep0: add spinlock for cdns3_check_new_setup 

commit 2587a029fa upstream.

The other thread may access other endpoints when the cdns3_check_new_setup
is handling, add spinlock to protect it.

Cc: <stable@vger.kernel.org>
Fixes: 7733f6c32e ("usb: cdns3: Add Cadence USB3 DRD Driver")
Reviewed-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Peter Chen 2020-06-23 11:09:18 +08:00 committed by Sasha Levin
parent a0668653be
commit be8df02707
1 changed files with 4 additions and 3 deletions
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7
drivers/usb/cdns3/ep0.c
View File

@ -712,15 +712,17 @@ 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;
@ -745,7 +747,6 @@ 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");