linux-kernel - [PATCH 5/5] opticon: Fix resume logic

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Date:	Tue, 06 Oct 2009 16:06:57 +0100
From:	Alan Cox <alan@...ux.intel.com>
To:	greg@...ah.com, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: [PATCH 5/5] opticon: Fix resume logic

Opticon now takes the right mutex to check the port status but the status
check is done wrongly for the modern serial code, so fix it.

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 drivers/usb/serial/opticon.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)


diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index c3a9ce2..4ff9e7a 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -499,7 +499,8 @@ static int opticon_resume(struct usb_interface *intf)
 	int result;
 
 	mutex_lock(&port->port.mutex);
-	if (port->port.count)
+	/* This is protected by the port mutex against close/open */
+	if (test_bit(ASYNCB_INITIALIZED, &port->port.flags))
 		result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO);
 	else
 		result = 0;

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