linux-kernel - [PATCH 2/2 V2] staging: r8712u: Fix regression caused by commit 8c213fa

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Date:	Sat, 25 Feb 2012 18:10:21 -0600
From:	Larry Finger <Larry.Finger@...inger.net>
To:	gregkh@...uxfoundation.org
Cc:	Larry Finger <Larry.Finger@...inger.net>,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Subject: [PATCH 2/2 V2] staging: r8712u: Fix regression caused by commit 8c213fa

In commit 8c213fa "staging: r8712u: Use asynchronous firmware loading",
the command to release the firmware was placed in the wrong routine.

In combination with the bug introduced in commit a5ee652 "staging: r8712u:
Interface-state not fully tracked", the driver attempts to upload firmware
that had already been released. This bug is the source of one of the
problems in https://bugs.archlinux.org/task/27996#comment89833.


Tested-by: Alberto Lago Ballesteros <saniukeokusainaya@...il.com>
Tested-by: Adrian <agib@....de>
Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
---

 drivers/staging/rtl8712/os_intfs.c |    3 ---
 drivers/staging/rtl8712/usb_intf.c |    5 +++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c
index 4cf175f..7bbd53a 100644
--- a/drivers/staging/rtl8712/os_intfs.c
+++ b/drivers/staging/rtl8712/os_intfs.c
@@ -475,9 +475,6 @@ static int netdev_close(struct net_device *pnetdev)
 	r8712_free_assoc_resources(padapter);
 	/*s2-4.*/
 	r8712_free_network_queue(padapter);
-	release_firmware(padapter->fw);
-	/* never exit with a firmware callback pending */
-	wait_for_completion(&padapter->rtl8712_fw_ready);
 	return 0;
 }
 
diff --git a/drivers/staging/rtl8712/usb_intf.c b/drivers/staging/rtl8712/usb_intf.c
index fe0e2ff..e01fe14 100644
--- a/drivers/staging/rtl8712/usb_intf.c
+++ b/drivers/staging/rtl8712/usb_intf.c
@@ -30,6 +30,7 @@
 
 #include <linux/usb.h>
 #include <linux/module.h>
+#include <linux/firmware.h>
 
 #include "osdep_service.h"
 #include "drv_types.h"
@@ -620,6 +621,10 @@ static void r871xu_dev_remove(struct usb_interface *pusb_intf)
 	struct _adapter *padapter = netdev_priv(pnetdev);
 	struct usb_device *udev = interface_to_usbdev(pusb_intf);
 
+	if (padapter->fw_found)
+		release_firmware(padapter->fw);
+	/* never exit with a firmware callback pending */
+	wait_for_completion(&padapter->rtl8712_fw_ready);
 	usb_set_intfdata(pusb_intf, NULL);
 	if (padapter) {
 		if (drvpriv.drv_registered == true)
-- 
1.7.7

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