diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-03-24 11:35:46 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-03-28 03:13:20 +0300 |
| commit | 4bbf4d56583dd52c429d88f43cb614bdbe5deea6 (patch) | |
| tree | 7a3f902a08820342254e0d67607fe870b02620b3 /net/wireless/core.h | |
| parent | 3832c287f11ba001bbe48e9be8c59cb9f71f6b43 (diff) | |
| download | linux-4bbf4d56583dd52c429d88f43cb614bdbe5deea6.tar.xz | |
cfg80211: fix locking in nl80211_set_wiphy
Luis reports that there's a circular locking dependency;
this is because cfg80211_dev_rename() will acquire the
cfg80211_mutex while the device mutex is held, while
this normally is done the other way around. The solution
is to open-code the device-getting in nl80211_set_wiphy
and require holding the mutex around cfg80211_dev_rename
rather than acquiring it within.
Also fix a bug -- rtnl locking is expected by drivers so
we need to provide it.
Reported-by: Luis R. Rodriguez <lrodriguez@atheros.com>
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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/wireless/core.h b/net/wireless/core.h index 97a6fd8b2b03..d43daa236ef9 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -99,6 +99,9 @@ struct cfg80211_internal_bss { struct cfg80211_registered_device *cfg80211_drv_by_wiphy_idx(int wiphy_idx); int get_wiphy_idx(struct wiphy *wiphy); +struct cfg80211_registered_device * +__cfg80211_drv_from_info(struct genl_info *info); + /* * This function returns a pointer to the driver * that the genl_info item that is passed refers to. |