[4.20] Revert "mwifiex: restructure rx_reorder_tbl_lock usage"

Message ID	20181130175957.167031-1-briannorris@chromium.org (mailing list archive)
State	Accepted
Commit	1aa48f088615ebfa5e139951a0d3e7dc2c2af4ec
Delegated to:	Kalle Valo
Headers	show Return-Path: <linux-wireless-owner@kernel.org> From: Brian Norris <briannorris@chromium.org> To: Kalle Valo <kvalo@codeaurora.org> Cc: <linux-kernel@vger.kernel.org>, Amitkumar Karwar <amitkarwar@gmail.com>, Nishant Sarmukadam <nishants@marvell.com>, Ganapathi Bhat <gbhat@marvell.com>, Xinming Hu <huxinming820@gmail.com>, linux-wireless@vger.kernel.org, Brian Norris <briannorris@chromium.org>, stable@vger.kernel.org Subject: [4.20 PATCH] Revert "mwifiex: restructure rx_reorder_tbl_lock usage" Date: Fri, 30 Nov 2018 09:59:57 -0800 Message-Id: <20181130175957.167031-1-briannorris@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk
Series	[4.20] Revert "mwifiex: restructure rx_reorder_tbl_lock usage" \| expand [4.20] Revert "mwifiex: restructure rx_reorder_tbl_lock usage"

diff --git a/drivers/net/wireless/marvell/mwifiex/11n.c b/drivers/net/wireless/marvell/mwifiex/11n.c index e2addd8b878b..5d75c971004b 100644 --- a/drivers/net/wireless/marvell/mwifiex/11n.c +++ b/drivers/net/wireless/marvell/mwifiex/11n.c @@ -696,11 +696,10 @@ void mwifiex_11n_delba(struct mwifiex_private *priv, int tid) "Send delba to tid=%d, %pM\n", tid, rx_reor_tbl_ptr->ta); mwifiex_send_delba(priv, tid, rx_reor_tbl_ptr->ta, 0); - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, - flags); - return; + goto exit; } } +exit: spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); } diff --git a/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c b/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c index 8e63d14c1e1c..5380fba652cc 100644 --- a/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c +++ b/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c @@ -103,8 +103,6 @@ static int mwifiex_11n_dispatch_pkt(struct mwifiex_private *priv, void *payload) * There could be holes in the buffer, which are skipped by the function. * Since the buffer is linear, the function uses rotation to simulate * circular buffer. - * - * The caller must hold rx_reorder_tbl_lock spinlock. */ static void mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv, @@ -113,21 +111,25 @@ mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv, { int pkt_to_send, i; void *rx_tmp_ptr; + unsigned long flags; pkt_to_send = (start_win > tbl->start_win) ? min((start_win - tbl->start_win), tbl->win_size) : tbl->win_size; for (i = 0; i < pkt_to_send; ++i) { + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); rx_tmp_ptr = NULL; if (tbl->rx_reorder_ptr[i]) { rx_tmp_ptr = tbl->rx_reorder_ptr[i]; tbl->rx_reorder_ptr[i] = NULL; } + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); if (rx_tmp_ptr) mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr); } + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); /* * We don't have a circular buffer, hence use rotation to simulate * circular buffer @@ -138,6 +140,7 @@ mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv, } tbl->start_win = start_win; + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); } /* @@ -147,8 +150,6 @@ mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv, * The start window is adjusted automatically when a hole is located. * Since the buffer is linear, the function uses rotation to simulate * circular buffer. - * - * The caller must hold rx_reorder_tbl_lock spinlock. */ static void mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv, @@ -156,15 +157,22 @@ mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv, { int i, j, xchg; void *rx_tmp_ptr; + unsigned long flags; for (i = 0; i < tbl->win_size; ++i) { - if (!tbl->rx_reorder_ptr[i]) + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); + if (!tbl->rx_reorder_ptr[i]) { + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, + flags); break; + } rx_tmp_ptr = tbl->rx_reorder_ptr[i]; tbl->rx_reorder_ptr[i] = NULL; + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr); } + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); /* * We don't have a circular buffer, hence use rotation to simulate * circular buffer @@ -177,6 +185,7 @@ mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv, } } tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1); + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); } /* @@ -184,8 +193,6 @@ mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv, * * The function stops the associated timer and dispatches all the * pending packets in the Rx reorder table before deletion. - * - * The caller must hold rx_reorder_tbl_lock spinlock. */ static void mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv, @@ -211,7 +218,11 @@ mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv, del_timer_sync(&tbl->timer_context.timer); tbl->timer_context.timer_is_set = false; + + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); list_del(&tbl->list); + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); + kfree(tbl->rx_reorder_ptr); kfree(tbl); @@ -224,17 +235,22 @@ mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv, /* * This function returns the pointer to an entry in Rx reordering * table which matches the given TA/TID pair. - * - * The caller must hold rx_reorder_tbl_lock spinlock. */ struct mwifiex_rx_reorder_tbl * mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta) { struct mwifiex_rx_reorder_tbl *tbl; + unsigned long flags; - list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) - if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); + list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) { + if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) { + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, + flags); return tbl; + } + } + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return NULL; } @@ -251,9 +267,14 @@ void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta) return; spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); - list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) - if (!memcmp(tbl->ta, ta, ETH_ALEN)) + list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) { + if (!memcmp(tbl->ta, ta, ETH_ALEN)) { + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, + flags); mwifiex_del_rx_reorder_entry(priv, tbl); + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); + } + } spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return; @@ -262,18 +283,24 @@ void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta) /* * This function finds the last sequence number used in the packets * buffered in Rx reordering table. - * - * The caller must hold rx_reorder_tbl_lock spinlock. */ static int mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx) { struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr; + struct mwifiex_private *priv = ctx->priv; + unsigned long flags; int i; - for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) - if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); + for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) { + if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) { + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, + flags); return i; + } + } + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return -1; } @@ -291,22 +318,17 @@ mwifiex_flush_data(struct timer_list *t) struct reorder_tmr_cnxt *ctx = from_timer(ctx, t, timer); int start_win, seq_num; - unsigned long flags; ctx->timer_is_set = false; - spin_lock_irqsave(&ctx->priv->rx_reorder_tbl_lock, flags); seq_num = mwifiex_11n_find_last_seq_num(ctx); - if (seq_num < 0) { - spin_unlock_irqrestore(&ctx->priv->rx_reorder_tbl_lock, flags); + if (seq_num < 0) return; - } mwifiex_dbg(ctx->priv->adapter, INFO, "info: flush data %d\n", seq_num); start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1); mwifiex_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr, start_win); - spin_unlock_irqrestore(&ctx->priv->rx_reorder_tbl_lock, flags); } /* @@ -333,14 +355,11 @@ mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta, * If we get a TID, ta pair which is already present dispatch all the * the packets and move the window size until the ssn */ - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta); if (tbl) { mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num); - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return; } - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); /* if !tbl then create one */ new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL); if (!new_node) @@ -551,20 +570,16 @@ int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv, int prev_start_win, start_win, end_win, win_size; u16 pkt_index; bool init_window_shift = false; - unsigned long flags; int ret = 0; - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta); if (!tbl) { - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); if (pkt_type != PKT_TYPE_BAR) mwifiex_11n_dispatch_pkt(priv, payload); return ret; } if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) { - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); mwifiex_11n_dispatch_pkt(priv, payload); return ret; } @@ -651,8 +666,6 @@ int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv, if (!tbl->timer_context.timer_is_set || prev_start_win != tbl->start_win) mwifiex_11n_rxreorder_timer_restart(tbl); - - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return ret; } @@ -681,18 +694,14 @@ mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac, peer_mac, tid, initiator); if (cleanup_rx_reorder_tbl) { - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, peer_mac); if (!tbl) { - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, - flags); mwifiex_dbg(priv->adapter, EVENT, "event: TID, TA not found in table\n"); return; } mwifiex_del_rx_reorder_entry(priv, tbl); - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); } else { ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac); if (!ptx_tbl) { @@ -726,7 +735,6 @@ int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv, int tid, win_size; struct mwifiex_rx_reorder_tbl *tbl; uint16_t block_ack_param_set; - unsigned long flags; block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set); @@ -740,20 +748,17 @@ int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv, mwifiex_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n", add_ba_rsp->peer_mac_addr, tid); - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, add_ba_rsp->peer_mac_addr); if (tbl) mwifiex_del_rx_reorder_entry(priv, tbl); - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return 0; } win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> BLOCKACKPARAM_WINSIZE_POS; - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, add_ba_rsp->peer_mac_addr); if (tbl) { @@ -764,7 +769,6 @@ int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv, else tbl->amsdu = false; } - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); mwifiex_dbg(priv->adapter, CMD, "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n", @@ -804,8 +808,11 @@ void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv) spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); list_for_each_entry_safe(del_tbl_ptr, tmp_node, - &priv->rx_reorder_tbl_ptr, list) + &priv->rx_reorder_tbl_ptr, list) { + spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr); + spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); + } INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr); spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); @@ -929,7 +936,6 @@ void mwifiex_11n_rxba_sync_event(struct mwifiex_private *priv, int tlv_buf_left = len; int ret; u8 *tmp; - unsigned long flags; mwifiex_dbg_dump(priv->adapter, EVT_D, "RXBA_SYNC event:", event_buf, len); @@ -949,18 +955,14 @@ void mwifiex_11n_rxba_sync_event(struct mwifiex_private *priv, tlv_rxba->mac, tlv_rxba->tid, tlv_seq_num, tlv_bitmap_len); - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); rx_reor_tbl_ptr = mwifiex_11n_get_rx_reorder_tbl(priv, tlv_rxba->tid, tlv_rxba->mac); if (!rx_reor_tbl_ptr) { - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, - flags); mwifiex_dbg(priv->adapter, ERROR, "Can not find rx_reorder_tbl!"); return; } - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); for (i = 0; i < tlv_bitmap_len; i++) { for (j = 0 ; j < 8; j++) { diff --git a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c index a83c5afc256a..5ce85d5727e4 100644 --- a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c +++ b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c @@ -421,15 +421,12 @@ int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv, spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); } - spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); if (!priv->ap_11n_enabled || (!mwifiex_11n_get_rx_reorder_tbl(priv, uap_rx_pd->priority, ta) && (le16_to_cpu(uap_rx_pd->rx_pkt_type) != PKT_TYPE_AMSDU))) { ret = mwifiex_handle_uap_rx_forward(priv, skb); - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); return ret; } - spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); /* Reorder and send to kernel */ pkt_type = (u8)le16_to_cpu(uap_rx_pd->rx_pkt_type);

[4.20] Revert "mwifiex: restructure rx_reorder_tbl_lock usage"

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