[PATCH ath-current] wifi: ath11k: reset ar->num_station on hardware start

When (multiple) hw restart occurs, we end up in a situation where we
cannot accept new stations / mesh peers. This seems to be the
'num_stations' in 'struct ath11k' that did not get reseted properly in
this case. In ath11k_mac_op_start(), it was indeed the only accounting var
that did not get reseted so let's clear it too.

This avaoids problems like those:

	[1248828.088023] WARNING: CPU: 0 PID: 12281 at net/mac80211/util.c:1682 ieee80211_reconfig_stations+0x98/0xc0
	[1248828.088029] Modules linked in: ath11k_pci XXX [last unloaded: ath11k_pci]
	[1248828.088053] CPU: 0 UID: 0 PID: 12281 Comm: kworker/0:0 Tainted: G        W          XXX
	[1248828.088058] Tainted: [W]=WARN
	[1248828.088059] Hardware name: XXX (DT)
	[1248828.088060] Workqueue: events_freezable ieee80211_restart_work
	[1248828.088064] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
	[1248828.088068] pc : ieee80211_reconfig_stations+0x98/0xc0
	[1248828.088070] lr : ieee80211_reconfig_stations+0x94/0xc0
	[1248828.088073] sp : ffffff800025bc10
	[1248828.088074] x29: ffffff800025bc10 x28: 0000000000000001 x27: ffffff8027b19640
	[1248828.088078] x26: ffffff802a5619c8 x25: ffffff8027b199f0 x24: ffffff8027b19880
	[1248828.088082] x23: ffffff802a560e40 x22: ffffff8027b18880 x21: ffffff802a560800
	[1248828.088087] x20: 0000000000000001 x19: ffffff8027c71000 x18: ffffffffffffffff
	[1248828.088091] x17: 128c0801a9c37469 x16: 766e692d32464545 x15: ffffffffffffffff
	[1248828.088095] x14: 000000000000001f x13: 00000000000000b1 x12: 0000000000000001
	[1248828.088099] x11: ffffffc081061518 x10: ffffff800025baf0 x9 : ffffffc0808097f8
	[1248828.088103] x8 : 00000000ffffffd0 x7 : 0000000000000000 x6 : 000000000000003f
	[1248828.088107] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffffff8011ef2e80
	[1248828.088110] x2 : 0000000000000000 x1 : ffffff8011ef2e80 x0 : 00000000ffffff97
	[1248828.088115] Call trace:
	[1248828.088116]  ieee80211_reconfig_stations+0x98/0xc0 (P)
	[1248828.088119]  ieee80211_reconfig+0x774/0x1438
	[1248828.088123]  ieee80211_restart_work+0x10c/0x178
	[1248828.088127]  process_one_work+0x178/0x3c0
	[1248828.088130]  worker_thread+0x280/0x440
	[1248828.088133]  kthread+0xe0/0xf8
	[1248828.088137]  ret_from_fork+0x10/0x20
	[1248828.088141] ---[ end trace 0000000000000000 ]---
	[1248828.090658] mesh1: HW problem - can not stop rx aggregation for 72:fc:8f:a8:f1:ed tid 0
	[1248828.090667] mesh1: HW problem - can not stop rx aggregation for 72:fc:8f:a8:f1:ed tid 3
	[1248828.090670] mesh1: HW problem - can not stop rx aggregation for 72:fc:8f:a8:f1:ed tid 4
	[1248828.090689] wlan2: HW problem - can not stop rx aggregation for 78:64:c0:26:8e:69 tid 0
	[1248828.090694] wlan2: HW problem - can not stop rx aggregation for 78:64:c0:26:8e:69 tid 1
	[1248828.090697] wlan2: HW problem - can not stop rx aggregation for 78:64:c0:26:8e:69 tid 5
	[1248828.090700] wlan2: HW problem - can not stop rx aggregation for 78:64:c0:26:8e:69 tid 6
	[1248828.090704] wlan2: HW problem - can not stop rx aggregation for be:3b:3d:84:3a:00 tid 0
	[1248828.090707] wlan2: HW problem - can not stop rx aggregation for be:3b:3d:84:3a:00 tid 1
	[1248828.090710] wlan2: HW problem - can not stop rx aggregation for be:3b:3d:84:3a:00 tid 6
	[1248836.686596] ath11k_warn: 39 callbacks suppressed
	[1248836.686604] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)
	[1248836.686609] ath11k_pci 0000:04:00.0: Failed to add station: e8:51:9e:d6:93:22 for VDEV: 1
	[1248941.120126] ath11k_pci 0000:04:00.0: failed to flush sta transmit queue, data pkts pending 2
	[1248941.120186] ath11k_pci 0000:04:00.0: failed to clear all peer keys for vdev 2: -2
	[1248941.120190] ath11k_pci 0000:04:00.0: Failed to disassociate station: 92:14:23:65:57:fc
	[1248941.120196] ath11k_pci 0000:04:00.0: failed to lookup peer 92:14:23:65:57:fc on vdev 2
	[1248941.120200] ath11k_pci 0000:04:00.0: failed to find peer vdev_id 2 addr 92:14:23:65:57:fc in delete
	[1248941.120204] ath11k_pci 0000:04:00.0: Failed to delete peer: 92:14:23:65:57:fc for VDEV: 2
	[1248941.120207] ath11k_pci 0000:04:00.0: Failed to remove station: 92:14:23:65:57:fc for VDEV: 2
	[1248941.121319] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)
	[1248941.121326] ath11k_pci 0000:04:00.0: Failed to add station: 92:14:23:65:57:fc for VDEV: 2
	[1248941.123036] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)

Tested-on: QCN9074 PCI WLAN.HK.2.9.0.1-01977-QCAHKSWPL_SILICONZ-1

Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Nicolas Escande <[email protected]>
---
 drivers/net/wireless/ath/ath11k/mac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index ae91b57c8422..c1fa42edd363 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -6716,6 +6716,7 @@ static int ath11k_mac_op_start(struct ieee80211_hw *hw)
 	ar->num_started_vdevs = 0;
 	ar->num_created_vdevs = 0;
 	ar->num_peers = 0;
+	ar->num_stations = 0;
 	ar->allocated_vdev_map = 0;
 
 	/* Configure monitor status ring with default rx_filter to get rx status
-- 
2.55.0