diff options
| author | John W. Linville <linville@tuxdriver.com> | 2013-11-04 20:45:14 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-11-04 20:45:14 +0100 |
| commit | 01925efdf7e03b4b803b5c9f985163d687f7f017 (patch) | |
| tree | 6c318f9bf002efac5ccd87e8edad35863d72bd17 /net/mac80211/scan.c | |
| parent | rt2x00: rt2800pci: use module_pci_driver macro (diff) | |
| parent | drivers: net: wireless: b43: Fix possible NULL ptr dereference (diff) | |
| download | linux-01925efdf7e03b4b803b5c9f985163d687f7f017.tar.xz linux-01925efdf7e03b4b803b5c9f985163d687f7f017.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
drivers/net/wireless/iwlwifi/pcie/drv.c
Diffstat (limited to 'net/mac80211/scan.c')
| -rw-r--r-- | net/mac80211/scan.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index ecb57b0bf74a..5ad66a83ef7f 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -238,6 +238,9 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_local *local) enum ieee80211_band band; int i, ielen, n_chans; + if (test_bit(SCAN_HW_CANCELLED, &local->scanning)) + return false; + do { if (local->hw_scan_band == IEEE80211_NUM_BANDS) return false; @@ -939,7 +942,23 @@ void ieee80211_scan_cancel(struct ieee80211_local *local) if (!local->scan_req) goto out; + /* + * We have a scan running and the driver already reported completion, + * but the worker hasn't run yet or is stuck on the mutex - mark it as + * cancelled. + */ + if (test_bit(SCAN_HW_SCANNING, &local->scanning) && + test_bit(SCAN_COMPLETED, &local->scanning)) { + set_bit(SCAN_HW_CANCELLED, &local->scanning); + goto out; + } + if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { + /* + * Make sure that __ieee80211_scan_completed doesn't trigger a + * scan on another band. + */ + set_bit(SCAN_HW_CANCELLED, &local->scanning); if (local->ops->cancel_hw_scan) drv_cancel_hw_scan(local, rcu_dereference_protected(local->scan_sdata, |