From f236464f1db7bea80075e6e31ac70dc6eb80547f Mon Sep 17 00:00:00 2001 From: Alexis Lothoré Date: Wed, 10 Apr 2024 09:10:34 +0200 Subject: wifi: wilc1000: convert list management to RCU MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit wilc1000 driver currently uses SRCU API to manage vif list. There is no real reason to use SRCU API here, and it makes things slightly more complicated (we need to handle a SRCU index as well as a srcu_struct) than classical RCU. Switch SRCU APIs to RCU APIs. Signed-off-by: Alexis Lothoré Signed-off-by: Kalle Valo Link: https://msgid.link/20240410-wilc_srcu_to_rcu-v1-2-a9ff5b10feaa@bootlin.com --- drivers/net/wireless/microchip/wilc1000/netdev.c | 43 ++++++++++-------------- 1 file changed, 18 insertions(+), 25 deletions(-) (limited to 'drivers/net/wireless/microchip/wilc1000/netdev.c') diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c index 710e29bea560..73f56f7b002b 100644 --- a/drivers/net/wireless/microchip/wilc1000/netdev.c +++ b/drivers/net/wireless/microchip/wilc1000/netdev.c @@ -127,30 +127,28 @@ void wilc_wlan_set_bssid(struct net_device *wilc_netdev, const u8 *bssid, int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc) { - int srcu_idx; u8 ret_val = 0; struct wilc_vif *vif; - srcu_idx = srcu_read_lock(&wilc->srcu); + rcu_read_lock(); wilc_for_each_vif(wilc, vif) { if (!is_zero_ether_addr(vif->bssid)) ret_val++; } - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); return ret_val; } static void wilc_wake_tx_queues(struct wilc *wl) { - int srcu_idx; struct wilc_vif *ifc; - srcu_idx = srcu_read_lock(&wl->srcu); + rcu_read_lock(); wilc_for_each_vif(wl, ifc) { if (ifc->mac_opened && netif_queue_stopped(ifc->ndev)) netif_wake_queue(ifc->ndev); } - srcu_read_unlock(&wl->srcu, srcu_idx); + rcu_read_unlock(); } static int wilc_txq_task(void *vp) @@ -655,7 +653,6 @@ static int wilc_set_mac_addr(struct net_device *dev, void *p) struct sockaddr *addr = (struct sockaddr *)p; unsigned char mac_addr[ETH_ALEN]; struct wilc_vif *tmp_vif; - int srcu_idx; if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; @@ -667,19 +664,19 @@ static int wilc_set_mac_addr(struct net_device *dev, void *p) /* Verify MAC Address is not already in use: */ - srcu_idx = srcu_read_lock(&wilc->srcu); + rcu_read_lock(); wilc_for_each_vif(wilc, tmp_vif) { wilc_get_mac_address(tmp_vif, mac_addr); if (ether_addr_equal(addr->sa_data, mac_addr)) { if (vif != tmp_vif) { - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); return -EADDRNOTAVAIL; } - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); return 0; } } - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); result = wilc_set_mac_address(vif, (u8 *)addr->sa_data); if (result) @@ -767,15 +764,14 @@ netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev) wilc_tx_complete); if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) { - int srcu_idx; struct wilc_vif *vif; - srcu_idx = srcu_read_lock(&wilc->srcu); + rcu_read_lock(); wilc_for_each_vif(wilc, vif) { if (vif->mac_opened) netif_stop_queue(vif->ndev); } - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); } return NETDEV_TX_OK; @@ -819,13 +815,12 @@ void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size, unsigned int frame_len = 0; struct wilc_vif *vif; struct sk_buff *skb; - int srcu_idx; int stats; if (!wilc) return; - srcu_idx = srcu_read_lock(&wilc->srcu); + rcu_read_lock(); wilc_netdev = get_if_handler(wilc, buff); if (!wilc_netdev) goto out; @@ -853,15 +848,14 @@ void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size, netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats); } out: - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); } void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth) { - int srcu_idx; struct wilc_vif *vif; - srcu_idx = srcu_read_lock(&wilc->srcu); + rcu_read_lock(); wilc_for_each_vif(wilc, vif) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff; u16 type = le16_to_cpup((__le16 *)buff); @@ -882,7 +876,7 @@ void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth) if (vif->monitor_flag) wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size); } - srcu_read_unlock(&wilc->srcu, srcu_idx); + rcu_read_unlock(); } static const struct net_device_ops wilc_netdev_ops = { @@ -912,7 +906,7 @@ void wilc_netdev_cleanup(struct wilc *wilc) list_del_rcu(&vif->list); wilc->vif_num--; mutex_unlock(&wilc->vif_mutex); - synchronize_srcu(&wilc->srcu); + synchronize_rcu(); if (vif->ndev) unregister_netdev(vif->ndev); } @@ -931,16 +925,15 @@ static u8 wilc_get_available_idx(struct wilc *wl) { int idx = 0; struct wilc_vif *vif; - int srcu_idx; - srcu_idx = srcu_read_lock(&wl->srcu); + rcu_read_lock(); wilc_for_each_vif(wl, vif) { if (vif->idx == 0) idx = 1; else idx = 0; } - srcu_read_unlock(&wl->srcu, srcu_idx); + rcu_read_unlock(); return idx; } @@ -990,7 +983,7 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name, list_add_tail_rcu(&vif->list, &wl->vif_list); wl->vif_num += 1; mutex_unlock(&wl->vif_mutex); - synchronize_srcu(&wl->srcu); + synchronize_rcu(); return vif; -- cgit v1.2.3-59-g8ed1b