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b43legacy: Fix unload oops if firmware is not available

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commit 4520286653 upstream.

The asyncronous firmware load uses a completion struct to hold firmware
processing until the user-space routines are up and running. There is.
however, a problem in that the waiter is nevered canceled during teardown.
As a result, unloading the driver when firmware is not available causes an oops.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Larry Finger 2014-01-12 15:11:39 -06:00 committed by Greg Kroah-Hartman
parent 5cdc61ecc7
commit 06600864a0
1 changed files with 1 additions and 0 deletions
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drivers/net/wireless/b43legacy/main.c
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@ -3915,6 +3915,7 @@ static void b43legacy_remove(struct ssb_device *dev)
* as the ieee80211 unreg will destroy the workqueue. */
cancel_work_sync(&wldev->restart_work);
cancel_work_sync(&wl->firmware_load);
complete(&wldev->fw_load_complete);
B43legacy_WARN_ON(!wl);
if (!wldev->fw.ucode)