netdev - [PATCH 3/4] USB: wdm: wdm_wwan_port_tx_complete mutex in atomic context

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Message-ID: <20250331132614.51902-4-oneukum@suse.com>
Date: Mon, 31 Mar 2025 15:25:03 +0200
From: Oliver Neukum <oneukum@...e.com>
To: gregkh@...uxfoundation.org,
	bjorn@...k.no,
	loic.poulain@...aro.org,
	linux-usb@...r.kernel.org,
	netdev@...r.kernel.org
Cc: Oliver Neukum <oneukum@...e.com>
Subject: [PATCH 3/4] USB: wdm: wdm_wwan_port_tx_complete mutex in atomic context

wdm_wwan_port_tx_complete is called from a completion
handler with irqs disabled and possible in IRQ context
usb_autopm_put_interface can take a mutex.
Hence usb_autopm_put_interface_async must be used.

Fixes: cac6fb015f71 ("usb: class: cdc-wdm: WWAN framework integration")
Signed-off-by: Oliver Neukum <oneukum@...e.com>
---
 drivers/usb/class/cdc-wdm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index e67844618da6..f50c3ad86eca 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -880,7 +880,7 @@ static void wdm_wwan_port_tx_complete(struct urb *urb)
 	struct sk_buff *skb = urb->context;
 	struct wdm_device *desc = skb_shinfo(skb)->destructor_arg;
 
-	usb_autopm_put_interface(desc->intf);
+	usb_autopm_put_interface_async(desc->intf);
 	wwan_port_txon(desc->wwanp);
 	kfree_skb(skb);
 }
-- 
2.49.0