From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 3f467036093fedd7e231924327455fc609b5ef02 ]
Commit cc7ad0d77b51 ("drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()") besides fixing the deadlock also modified rtw_scan_timeout_handler() to use spin_[un]lock_irq() instead of spin_[un]lock_bh().
Disabling the IRQs is not necessary since all code taking this lock runs from either user contexts or from softirqs
rtw_scan_timeout_handler() is the only function taking pmlmepriv->lock which uses spin_[un]lock_irq() for this. Switch back to spin_[un]lock_bh() to make it consistent with the rest of the code.
Fixes: cc7ad0d77b51 ("drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()") Cc: Duoming Zhou duoming@zju.edu.cn Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20230221145326.7808-2-hdegoede@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/staging/rtl8723bs/core/rtw_mlme.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c index ea2a6566e51bf..091842d70d486 100644 --- a/drivers/staging/rtl8723bs/core/rtw_mlme.c +++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c @@ -1590,11 +1590,11 @@ void rtw_scan_timeout_handler(struct timer_list *t) mlmepriv.scan_to_timer); struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
- spin_lock_irq(&pmlmepriv->lock); + spin_lock_bh(&pmlmepriv->lock);
_clr_fwstate_(pmlmepriv, _FW_UNDER_SURVEY);
- spin_unlock_irq(&pmlmepriv->lock); + spin_unlock_bh(&pmlmepriv->lock);
rtw_indicate_scan_done(adapter, true); }