linux-kernel - [PATCH 4.9 38/44] rt2x00: avoid introducing a USB dependency in the rt2x00lib module

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Date:   Tue, 27 Jun 2017 16:12:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vishal Thanki <vishalthanki@...il.com>,
        Felix Fietkau <nbd@....name>,
        Stanislaw Gruszka <sgruszka@...hat.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Amit Pundir <amit.pundir@...aro.org>
Subject: [PATCH 4.9 38/44] rt2x00: avoid introducing a USB dependency in the rt2x00lib module

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stanislaw Gruszka <sgruszka@...hat.com>

commit 6232c17438ed01f43665197db5a98a4a4f77ef47 upstream.

As reported by Felix:

Though protected by an ifdef, introducing an usb symbol dependency in
the rt2x00lib module is a major inconvenience for distributions that
package kernel modules split into individual packages.

Get rid of this unnecessary dependency by calling the usb related
function from a more suitable place.

Cc: Vishal Thanki <vishalthanki@...il.com>
Reported-by: Felix Fietkau <nbd@....name>
Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Amit Pundir <amit.pundir@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c |   23 ++++++++---------------
 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c |    5 +++++
 2 files changed, 13 insertions(+), 15 deletions(-)

--- a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
@@ -1422,21 +1422,6 @@ void rt2x00lib_remove_dev(struct rt2x00_
 	cancel_work_sync(&rt2x00dev->intf_work);
 	cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);
 	cancel_work_sync(&rt2x00dev->sleep_work);
-#if IS_ENABLED(CONFIG_RT2X00_LIB_USB)
-	if (rt2x00_is_usb(rt2x00dev)) {
-		usb_kill_anchored_urbs(rt2x00dev->anchor);
-		hrtimer_cancel(&rt2x00dev->txstatus_timer);
-		cancel_work_sync(&rt2x00dev->rxdone_work);
-		cancel_work_sync(&rt2x00dev->txdone_work);
-	}
-#endif
-	if (rt2x00dev->workqueue)
-		destroy_workqueue(rt2x00dev->workqueue);
-
-	/*
-	 * Free the tx status fifo.
-	 */
-	kfifo_free(&rt2x00dev->txstatus_fifo);
 
 	/*
 	 * Kill the tx status tasklet.
@@ -1452,6 +1437,14 @@ void rt2x00lib_remove_dev(struct rt2x00_
 	 */
 	rt2x00lib_uninitialize(rt2x00dev);
 
+	if (rt2x00dev->workqueue)
+		destroy_workqueue(rt2x00dev->workqueue);
+
+	/*
+	 * Free the tx status fifo.
+	 */
+	kfifo_free(&rt2x00dev->txstatus_fifo);
+
 	/*
 	 * Free extra components
 	 */
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
@@ -740,6 +740,11 @@ void rt2x00usb_uninitialize(struct rt2x0
 {
 	struct data_queue *queue;
 
+	usb_kill_anchored_urbs(rt2x00dev->anchor);
+	hrtimer_cancel(&rt2x00dev->txstatus_timer);
+	cancel_work_sync(&rt2x00dev->rxdone_work);
+	cancel_work_sync(&rt2x00dev->txdone_work);
+
 	queue_for_each(rt2x00dev, queue)
 		rt2x00usb_free_entries(queue);
 }