brcmfmac: use lock in brcmf_fws_del_interface()
When deleting an interface in firmware-signalling module it will
clear any destination descriptors. To avoid concurrency issues it
should take the lock using brcmf_fws_lock().
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
index 648f9bd..1cfec56 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
@@ -1821,14 +1821,17 @@
void brcmf_fws_del_interface(struct brcmf_if *ifp)
{
struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
+ ulong flags;
brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
if (!entry)
return;
+ brcmf_fws_lock(ifp->drvr, flags);
ifp->fws_desc = NULL;
brcmf_fws_clear_mac_descriptor(entry);
brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
+ brcmf_fws_unlock(ifp->drvr, flags);
}
static void brcmf_fws_dequeue_worker(struct work_struct *worker)