[RFC 2/2] usb: usb_wwan: port may be gone on device resume

[Bjørn Mork <bjorn@xxxxxxx>]

We cannot unconditionally access any usb-serial port specific
data from the USB driver.  The usb-serial port may already
be gone when the USB device is resumed.  This will happen
when the driver is unloaded.

Treat ports with no portdata as closed ports to avoid a NULL
pointer dereference on resume.

Signed-off-by: Bjørn Mork <bjorn@xxxxxxx>
---
 drivers/usb/serial/usb_wwan.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 7d08113..25d73f4 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -700,7 +700,7 @@ int usb_wwan_resume(struct usb_serial *serial)
 
 		/* skip closed ports */
 		spin_lock_irq(&intfdata->susp_lock);
-		if (!portdata->opened) {
+		if (!portdata || !portdata->opened) {
 			spin_unlock_irq(&intfdata->susp_lock);
 			continue;
 		}
-- 
1.7.2.5

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