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brcmfmac: p2p: Fix recently introduced deadlock issue 

Commit a05829a722 ("cfg80211: avoid holding the RTNL when calling the
driver") replaced the rtnl_lock parameter passed to various brcmf
functions with just lock, because since that commit it is not just
about the rtnl_lock but also about the wiphy_lock .

During this search/replace the "if (!rtnl_locked)" check in brcmfmac/p2p.c
was accidentally replaced with "if (locked)", dropping the inversion of
the check. This causes the code to now call rtnl_lock() while already
holding the lock, causing a deadlock.

Add back the "!" to the if-condition to fix this.

Cc: Johannes Berg <johannes.berg@intel.com>
Fixes: a05829a722 ("cfg80211: avoid holding the RTNL when calling the driver")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210313143635.109154-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2021-03-13 15:36:35 +01:00 committed by Kalle Valo
parent 8f6a70fd71
commit bd83a2fc05
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
View File

@ -2439,7 +2439,7 @@ void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool locked)
vif = ifp->vif;
cfg = wdev_to_cfg(&vif->wdev);
cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
if (locked) {
if (!locked) {
rtnl_lock();
wiphy_lock(cfg->wiphy);
cfg80211_unregister_wdev(&vif->wdev);