[PATCH 1/2] pl2303 autosuspend - bug fix

Avoid potential null pointer dereference.

Signed-off-by: Sarah Sharp <[email protected]>
---
 drivers/usb/serial/usb-serial.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 4b1bd7d..9af1c12 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1121,7 +1121,9 @@ int usb_serial_resume(struct usb_interface *intf)
 {
 	struct usb_serial *serial = usb_get_intfdata(intf);
 
-	return serial->type->resume(serial);
+	if (serial->type->resume)
+		return serial->type->resume(serial);
+	return 0;
 }
 EXPORT_SYMBOL(usb_serial_resume);
 
-- 
1.5.3.4

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