Patchwork [231/270] b43: Fix oops on unload when firmware not found

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Submitter Herton Ronaldo Krzesinski
Date Nov. 26, 2012, 4:58 p.m.
Message ID <1353949160-26803-232-git-send-email-herton.krzesinski@canonical.com>
Download mbox | patch
Permalink /patch/201962/
State New
Headers show

Comments

Herton Ronaldo Krzesinski - Nov. 26, 2012, 4:58 p.m.
3.5.7u1 -stable review patch.  If anyone has any objections, please let me know.

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

From: Larry Finger <Larry.Finger@lwfinger.net>

commit f89ff6441df06abc2d95f3ef67525923032d6283 upstream.

When b43 fails to find firmware when loaded, a subsequent unload will
oops due to calling ieee80211_unregister_hw() when the corresponding
register call was never made.

Commit 2d838bb608e2d1f6cb4280e76748cb812dc822e7 fixed the same problem
for b43legacy.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Markus Kanet <dvmailing@gmx.eu>
Cc: Markus Kanet <dvmailing@gmx.eu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
 drivers/net/wireless/b43/main.c |    4 ++++
 1 file changed, 4 insertions(+)

Patch

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index b80352b..c04d7b6 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -5369,6 +5369,8 @@  static void b43_bcma_remove(struct bcma_device *core)
 	cancel_work_sync(&wldev->restart_work);
 
 	B43_WARN_ON(!wl);
+	if (!wldev->fw.ucode.data)
+		return;			/* NULL if firmware never loaded */
 	if (wl->current_dev == wldev && wl->hw_registred) {
 		b43_leds_stop(wldev);
 		ieee80211_unregister_hw(wl->hw);
@@ -5443,6 +5445,8 @@  static void b43_ssb_remove(struct ssb_device *sdev)
 	cancel_work_sync(&wldev->restart_work);
 
 	B43_WARN_ON(!wl);
+	if (!wldev->fw.ucode.data)
+		return;			/* NULL if firmware never loaded */
 	if (wl->current_dev == wldev && wl->hw_registred) {
 		b43_leds_stop(wldev);
 		ieee80211_unregister_hw(wl->hw);