This is a note to let you know that I've just added the patch titled
wifi: wilc1000: do not realloc workqueue everytime an interface is added
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-wilc1000-do-not-realloc-workqueue-everytime-an-.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7cae1ac568dbe27578b97d25bdb59bd4a08e1570
Author: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
Date: Mon Jan 15 15:56:32 2024 +0100
wifi: wilc1000: do not realloc workqueue everytime an interface is added
[ Upstream commit 328efda22af81130c2ad981c110518cb29ff2f1d ]
Commit 09ed8bfc5215 ("wilc1000: Rename workqueue from "WILC_wq" to
"NETDEV-wq"") moved workqueue creation in wilc_netdev_ifc_init in order to
set the interface name in the workqueue name. However, while the driver
needs only one workqueue, the wilc_netdev_ifc_init is called each time we
add an interface over a phy, which in turns overwrite the workqueue with a
new one. This can be observed with the following commands:
for i in $(seq 0 10)
do
iw phy phy0 interface add wlan1 type managed
iw dev wlan1 del
done
ps -eo pid,comm|grep wlan
39 kworker/R-wlan0
98 kworker/R-wlan1
102 kworker/R-wlan1
105 kworker/R-wlan1
108 kworker/R-wlan1
111 kworker/R-wlan1
114 kworker/R-wlan1
117 kworker/R-wlan1
120 kworker/R-wlan1
123 kworker/R-wlan1
126 kworker/R-wlan1
129 kworker/R-wlan1
Fix this leakage by putting back hif_workqueue allocation in
wilc_cfg80211_init. Regarding the workqueue name, it is indeed relevant to
set it lowercase, however it is not attached to a specific netdev, so
enforcing netdev name in the name is not so relevant. Still, enrich the
name with the wiphy name to make it clear which phy is using the workqueue.
Fixes: 09ed8bfc5215 ("wilc1000: Rename workqueue from "WILC_wq" to "NETDEV-wq"")
Signed-off-by: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
Co-developed-by: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
Signed-off-by: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://msgid.link/20240115-wilc_1000_fixes-v1-3-54d29463a738@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/microchip/wilc1000/cfg80211.c b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
index ad2509d8c99a4..2d0474e6404e1 100644
--- a/drivers/net/wireless/microchip/wilc1000/cfg80211.c
+++ b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
@@ -1804,15 +1804,24 @@ int wilc_cfg80211_init(struct wilc **wilc, struct device *dev, int io_type,
INIT_LIST_HEAD(&wl->rxq_head.list);
INIT_LIST_HEAD(&wl->vif_list);
+ wl->hif_workqueue = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM,
+ wiphy_name(wl->wiphy));
+ if (!wl->hif_workqueue) {
+ ret = -ENOMEM;
+ goto free_cfg;
+ }
vif = wilc_netdev_ifc_init(wl, "wlan%d", WILC_STATION_MODE,
NL80211_IFTYPE_STATION, false);
if (IS_ERR(vif)) {
ret = PTR_ERR(vif);
- goto free_cfg;
+ goto free_hq;
}
return 0;
+free_hq:
+ destroy_workqueue(wl->hif_workqueue);
+
free_cfg:
wilc_wlan_cfg_deinit(wl);
diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c
index 81e8f25863f5b..6c1058e5299c7 100644
--- a/drivers/net/wireless/microchip/wilc1000/netdev.c
+++ b/drivers/net/wireless/microchip/wilc1000/netdev.c
@@ -989,13 +989,6 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
goto error;
}
- wl->hif_workqueue = alloc_ordered_workqueue("%s-wq", WQ_MEM_RECLAIM,
- ndev->name);
- if (!wl->hif_workqueue) {
- ret = -ENOMEM;
- goto unregister_netdev;
- }
-
ndev->needs_free_netdev = true;
vif->iftype = vif_type;
vif->idx = wilc_get_available_idx(wl);
@@ -1008,12 +1001,11 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
return vif;
-unregister_netdev:
+error:
if (rtnl_locked)
cfg80211_unregister_netdevice(ndev);
else
unregister_netdev(ndev);
- error:
free_netdev(ndev);
return ERR_PTR(ret);
}
