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wil6210: protect list of pending wmi events during flush 

When flush is done, pending events list is manipulated
without taking the proper spinlock, which could lead to
memory corruption if list is manipulated by wmi worker
or by interrupt routine.

Signed-off-by: Hamad Kadmany <qca_hkadmany@qca.qualcomm.com>
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Hamad Kadmany 2017-03-08 13:52:16 +02:00 committed by Kalle Valo
parent bcdd49b074
commit f6b29b6585
1 changed files with 5 additions and 0 deletions
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5
drivers/net/wireless/ath/wil6210/wmi.c
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@ -1738,14 +1738,19 @@ int wmi_new_sta(struct wil6210_priv *wil, const u8 *mac, u8 aid)
void wmi_event_flush(struct wil6210_priv *wil)
{
ulong flags;
struct pending_wmi_event *evt, *t;
wil_dbg_wmi(wil, "event_flush\n");
spin_lock_irqsave(&wil->wmi_ev_lock, flags);
list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
list_del(&evt->list);
kfree(evt);
}
spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
}
static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,