Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S937093AbdCJMUV (ORCPT <rfc822;w@1wt.eu>);
        Fri, 10 Mar 2017 07:20:21 -0500
Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:45208 "EHLO
        shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK)
        by vger.kernel.org with ESMTP id S936631AbdCJMUS (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 10 Mar 2017 07:20:18 -0500
Content-Type: text/plain; charset="UTF-8"
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
MIME-Version: 1.0
From: Ben Hutchings <ben@decadent.org.uk>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
CC: akpm@linux-foundation.org, "Bin Liu" <b-liu@ti.com>,
        "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
        "Tony Lindgren" <tony@atomide.com>
Date: Fri, 10 Mar 2017 11:46:22 +0000
Message-ID: <lsq.1489146382.929989605@decadent.org.uk>
X-Mailer: LinuxStableQueue (scripts by bwh)
Subject: [PATCH 3.16 183/370] usb: musb: Fix trying to free already-free IRQ 4
In-Reply-To: <lsq.1489146380.780052105@decadent.org.uk>
X-SA-Exim-Connect-IP: 82.70.136.246
X-SA-Exim-Mail-From: ben@decadent.org.uk
X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 1397
Lines: 43

3.16.42-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Tony Lindgren <tony@atomide.com>

commit 8c300fe282fa254ea730c92cb0983e2642dc1fff upstream.

When unloading omap2430, we can get the following splat:

WARNING: CPU: 1 PID: 295 at kernel/irq/manage.c:1478 __free_irq+0xa8/0x2c8
Trying to free already-free IRQ 4
...
[<c01a8b78>] (free_irq) from [<bf0aea84>]
(musbhs_dma_controller_destroy+0x28/0xb0 [musb_hdrc])
[<bf0aea84>] (musbhs_dma_controller_destroy [musb_hdrc]) from
[<bf09f88c>] (musb_remove+0xf0/0x12c [musb_hdrc])
[<bf09f88c>] (musb_remove [musb_hdrc]) from [<c056a384>]
(platform_drv_remove+0x24/0x3c)
...

This is because the irq number in use is 260 nowadays, and the dma
controller is using u8 instead of int.

Fixes: 6995eb68aab7 ("USB: musb: enable low level DMA operation for Blackfin")
Signed-off-by: Tony Lindgren <tony@atomide.com>
[b-liu@ti.com: added Fixes tag]
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 drivers/usb/musb/musbhsdma.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/musb/musbhsdma.h
+++ b/drivers/usb/musb/musbhsdma.h
@@ -157,5 +157,5 @@ struct musb_dma_controller {
 	void __iomem			*base;
 	u8				channel_count;
 	u8				used_channels;
-	u8				irq;
+	int				irq;
 };