From patchwork Mon Nov 26 16:58:41 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [231/270] b43: Fix oops on unload when firmware not found From: Herton Ronaldo Krzesinski X-Patchwork-Id: 201962 Message-Id: <1353949160-26803-232-git-send-email-herton.krzesinski@canonical.com> To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Markus Kanet , Larry Finger Date: Mon, 26 Nov 2012 14:58:41 -0200 3.5.7u1 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Larry Finger 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 Tested-by: Markus Kanet Cc: Markus Kanet Signed-off-by: John W. Linville Signed-off-by: Herton Ronaldo Krzesinski --- drivers/net/wireless/b43/main.c | 4 ++++ 1 file changed, 4 insertions(+) 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);