| Message ID | 20250503141958.584143-1-zlyang_001@163.com |
|---|---|
| State | New |
| Headers | show |
| Series | usb: gadget: u_ether: Continue to send skbs if remote wakeup fails | expand |
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index f58590bf5e02..9d746ed3f072 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -473,10 +473,11 @@ static netdev_tx_t eth_start_xmit(struct sk_buff *skb, if (dev->port_usb && dev->port_usb->is_suspend) { DBG(dev, "Port suspended. Triggering wakeup\n"); - netif_stop_queue(net); - spin_unlock_irqrestore(&dev->lock, flags); - ether_wakeup_host(dev->port_usb); - return NETDEV_TX_BUSY; + if (!ether_wakeup_host(dev->port_usb)) { + netif_stop_queue(net); + spin_unlock_irqrestore(&dev->lock, flags); + return NETDEV_TX_BUSY; + } } spin_unlock_irqrestore(&dev->lock, flags);
While UDC suspends, u_ether attempts to remote wakeup the host if there are any pending transfers. If there are no pending transfers, the is_suspend flag is set. If the is_suspend flag is set, it attempts to wakeup the host when start to transmit skbs. However, if wakeup fails, for example, wakeup is not supported, skbs will never be sent. To fix this, stop to queue skbs and return NETDEV_TX_BUSY only if remote wakeup operation is successful. Fixes: 17c2c87c3786 ("usb: gadget: u_ether: Set is_suspend flag if remote wakeup fails") Signed-off-by: Zhilin Yang <zlyang_001@163.com> --- drivers/usb/gadget/function/u_ether.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)