diff options
author | Johannes Berg <johannes@sipsolutions.net> | 2009-08-12 22:21:21 +0200 |
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committer | John W. Linville <linville@tuxdriver.com> | 2009-08-14 09:14:07 -0400 |
commit | 36e6fea84905512ea776707e82b5b435220efc17 (patch) | |
tree | db588e7dbbfcf0fa47f4954344a03961e960c898 /init/Kconfig | |
parent | 70bdb6b275d789ddf05c3a858e6b57715539394b (diff) |
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 'init/Kconfig')
0 files changed, 0 insertions, 0 deletions