diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-08-12 22:21:21 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-08-14 09:14:07 -0400 |
| commit | 36e6fea84905512ea776707e82b5b435220efc17 (patch) | |
| tree | db588e7dbbfcf0fa47f4954344a03961e960c898 /net/wireless/core.h | |
| parent | 70bdb6b275d789ddf05c3a858e6b57715539394b (diff) | |
| download | linux-36e6fea84905512ea776707e82b5b435220efc17.tar.bz2 | |
cfg80211: check for and abort dangling scan requests
If you trigger a scan request on an interface and then
take it down, or rmmod the module or unplug the device
the driver might "forget" to cancel the scan request.
That is a bug in the driver, but the current behaviour
is that we just hang endlessly waiting for the netdev
refcount to become 0 which it never will. To improve
robustness, check for this situation in cfg80211, warn
about it and clean up behind the driver. I don't just
clean up silently because it's likely that the driver
also has some internal state it has now leaked.
Additionally, this fixes a locking bug, clearing the
scan_req pointer should be done under the rdev lock.
Finally, we also need to _wait_ for the scan work and
not just abort it since it might be pending and wanting
to do a cleanup.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/core.h')
| -rw-r--r-- | net/wireless/core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/wireless/core.h b/net/wireless/core.h index f7be3a9b427e..c603f5286326 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -368,6 +368,7 @@ void cfg80211_sme_scan_done(struct net_device *dev); void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); void cfg80211_sme_disassoc(struct net_device *dev, int idx); void __cfg80211_scan_done(struct work_struct *wk); +void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev); void cfg80211_upload_connect_keys(struct wireless_dev *wdev); struct ieee80211_channel * |