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wifi: cfg80211: check wiphy mutex is held for wdev mutex

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[ Upstream commit 1474bc87fe ]

This might seem pretty pointless rather than changing the locking
immediately, but it seems safer to run for a while with checks and
the old locking scheme, and then remove the wdev lock later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johannes Berg 2023-08-28 13:59:56 +02:00 committed by Greg Kroah-Hartman
parent f34056c305
commit 268f84a827
1 changed files with 7 additions and 1 deletions
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8
net/wireless/core.h
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@ -228,6 +228,7 @@ void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
static inline void wdev_lock(struct wireless_dev *wdev)
__acquires(wdev)
{
lockdep_assert_held(&wdev->wiphy->mtx);
mutex_lock(&wdev->mtx);
__acquire(wdev->mtx);
}
@ -235,11 +236,16 @@ static inline void wdev_lock(struct wireless_dev *wdev)
static inline void wdev_unlock(struct wireless_dev *wdev)
__releases(wdev)
{
lockdep_assert_held(&wdev->wiphy->mtx);
__release(wdev->mtx);
mutex_unlock(&wdev->mtx);
}
#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
static inline void ASSERT_WDEV_LOCK(struct wireless_dev *wdev)
{
lockdep_assert_held(&wdev->wiphy->mtx);
lockdep_assert_held(&wdev->mtx);
}
static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
{