From patchwork Thu Apr 15 08:47:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 12204711 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32A18C43461 for ; Thu, 15 Apr 2021 08:47:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C42A611CD for ; Thu, 15 Apr 2021 08:47:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231678AbhDOIrv (ORCPT ); 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Thu, 15 Apr 2021 16:47:19 +0800 From: Ping-Ke Shih To: , CC: , , , , Subject: [PATCH 1/3] rtw88: 8821c: Don't set RX_FLAG_DECRYPTED if packet has no encryption Date: Thu, 15 Apr 2021 16:47:01 +0800 Message-ID: <20210415084703.27255-2-pkshih@realtek.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210415084703.27255-1-pkshih@realtek.com> References: <20210415084703.27255-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.146] X-ClientProxiedBy: RTEXMBS03.realtek.com.tw (172.21.6.96) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIxLzQvMTUgpFekyCAwNjow?= =?big5_tw?b?MDowMA==?= X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-AntiSpam-Outbound-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 04/15/2021 08:05:31 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 163124 [Apr 15 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: pkshih@realtek.com X-KSE-AntiSpam-Info: LuaCore: 442 442 b985cb57763b61d2a20abb585d5d4cc10c315b09 X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: realtek.com:7.1.1;127.0.0.199:7.1.2;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-KSE-AntiSpam-Info: {Track_Chinese_Simplified, headers_charset} X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 04/15/2021 08:07:00 X-KSE-ServerInfo: RTEXH36502.realtek.com.tw, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIxLzQvMTUgpFekyCAwNzox?= =?big5_tw?b?MDowMA==?= X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-AntiSpam-Outbound-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 04/15/2021 08:09:32 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 163124 [Apr 15 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: pkshih@realtek.com X-KSE-AntiSpam-Info: LuaCore: 442 442 b985cb57763b61d2a20abb585d5d4cc10c315b09 X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;127.0.0.199:7.1.2;realtek.com:7.1.1 X-KSE-AntiSpam-Info: {Track_Chinese_Simplified, headers_charset} X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 04/15/2021 08:12:00 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Guo-Feng Fan The value of GET_RX_DESC_SWDEC() indicates that if this RX packet requires software decryption or not. And software decryption is required when the packet was encrypted and the hardware failed to decrypt it. So, GET_RX_DESC_SWDEC() is negative does not mean that this packet is decrypted, it might just have no encryption at all. To actually see if the packet is decrypted, driver needs to further check if the hardware has successfully decrypted it, with a specific type of encryption algorithm. Signed-off-by: Guo-Feng Fan Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw88/rtw8821c.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c index 33c6cf1206c8..785b8181513f 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c @@ -581,7 +581,8 @@ static void rtw8821c_query_rx_desc(struct rtw_dev *rtwdev, u8 *rx_desc, pkt_stat->phy_status = GET_RX_DESC_PHYST(rx_desc); pkt_stat->icv_err = GET_RX_DESC_ICV_ERR(rx_desc); pkt_stat->crc_err = GET_RX_DESC_CRC32(rx_desc); - pkt_stat->decrypted = !GET_RX_DESC_SWDEC(rx_desc); + pkt_stat->decrypted = !GET_RX_DESC_SWDEC(rx_desc) && + GET_RX_DESC_ENC_TYPE(rx_desc) != RX_DESC_ENC_NONE; pkt_stat->is_c2h = GET_RX_DESC_C2H(rx_desc); pkt_stat->pkt_len = GET_RX_DESC_PKT_LEN(rx_desc); pkt_stat->drv_info_sz = GET_RX_DESC_DRV_INFO_SIZE(rx_desc); From patchwork Thu Apr 15 08:47:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 12204713 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41F3DC43460 for ; Thu, 15 Apr 2021 08:47:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 208496101B for ; Thu, 15 Apr 2021 08:47:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231143AbhDOIry (ORCPT ); Thu, 15 Apr 2021 04:47:54 -0400 Received: from rtits2.realtek.com ([211.75.126.72]:52866 "EHLO rtits2.realtek.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231773AbhDOIrw (ORCPT ); Thu, 15 Apr 2021 04:47:52 -0400 Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.73 with qID 13F8lNjF5022675, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36502.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/2.71/5.88) with ESMTPS id 13F8lNjF5022675 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 15 Apr 2021 16:47:23 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36502.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 15 Apr 2021 16:47:22 +0800 Received: from localhost (172.21.69.146) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 15 Apr 2021 16:47:21 +0800 From: Ping-Ke Shih To: , CC: , , , , Subject: [PATCH 2/3] rtw88: Fix potential unrecoverable tx queue stop Date: Thu, 15 Apr 2021 16:47:02 +0800 Message-ID: <20210415084703.27255-3-pkshih@realtek.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210415084703.27255-1-pkshih@realtek.com> References: <20210415084703.27255-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.146] X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIxLzQvMTUgpFekyCAwNjow?= =?big5_tw?b?MDowMA==?= X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-AntiSpam-Outbound-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 04/15/2021 08:05:31 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 163124 [Apr 15 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: pkshih@realtek.com X-KSE-AntiSpam-Info: LuaCore: 442 442 b985cb57763b61d2a20abb585d5d4cc10c315b09 X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;realtek.com:7.1.1;127.0.0.199:7.1.2 X-KSE-AntiSpam-Info: {Track_Chinese_Simplified, headers_charset} X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 04/15/2021 08:07:00 X-KSE-ServerInfo: RTEXH36502.realtek.com.tw, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIxLzQvMTUgpFekyCAwNzox?= =?big5_tw?b?MDowMA==?= X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-AntiSpam-Outbound-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 04/15/2021 08:09:32 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 163124 [Apr 15 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: pkshih@realtek.com X-KSE-AntiSpam-Info: LuaCore: 442 442 b985cb57763b61d2a20abb585d5d4cc10c315b09 X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;127.0.0.199:7.1.2;realtek.com:7.1.1 X-KSE-AntiSpam-Info: {Track_Chinese_Simplified, headers_charset} X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 04/15/2021 08:12:00 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Yu-Yen Ting If there are lots of packets to be transmitted, the driver would check whether the available descriptors are sufficient according the read/write point of tx queue. Once the available descriptor is not enough, ieee80211_stop_queue is called. TX ISR, meanwhile, is releasing the tx resources after the packets are transmitted. This routine may call ieee80211_wake_queue by checking the available descriptor. The potential queue stop problem would occur when the tx queue is stopped due to the heavy traffic. Then thare is no chance to wake the queue up because the read point is not updated immediately, as a result, no more packets coulde be transmitted in this queue. This patch makes sure the ieee80211_wake_queue could be called properly and avoids the race condition when ring->r.rp, ring->queue_stopped are updated. Signed-off-by: Yu-Yen Ting Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw88/pci.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c index b8115b31839e..adea3c7551ab 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.c +++ b/drivers/net/wireless/realtek/rtw88/pci.c @@ -950,10 +950,12 @@ static int rtw_pci_tx_write(struct rtw_dev *rtwdev, return ret; ring = &rtwpci->tx_rings[queue]; + spin_lock_bh(&rtwpci->irq_lock); if (avail_desc(ring->r.wp, ring->r.rp, ring->r.len) < 2) { ieee80211_stop_queue(rtwdev->hw, skb_get_queue_mapping(skb)); ring->queue_stopped = true; } + spin_unlock_bh(&rtwpci->irq_lock); return 0; } @@ -968,7 +970,7 @@ static void rtw_pci_tx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci, struct sk_buff *skb; u32 count; u32 bd_idx_addr; - u32 bd_idx, cur_rp; + u32 bd_idx, cur_rp, rp_idx; u16 q_map; ring = &rtwpci->tx_rings[hw_queue]; @@ -977,6 +979,7 @@ static void rtw_pci_tx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci, bd_idx = rtw_read32(rtwdev, bd_idx_addr); cur_rp = bd_idx >> 16; cur_rp &= TRX_BD_IDX_MASK; + rp_idx = ring->r.rp; if (cur_rp >= ring->r.rp) count = cur_rp - ring->r.rp; else @@ -1000,12 +1003,15 @@ static void rtw_pci_tx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci, } if (ring->queue_stopped && - avail_desc(ring->r.wp, ring->r.rp, ring->r.len) > 4) { + avail_desc(ring->r.wp, rp_idx, ring->r.len) > 4) { q_map = skb_get_queue_mapping(skb); ieee80211_wake_queue(hw, q_map); ring->queue_stopped = false; } + if (++rp_idx >= ring->r.len) + rp_idx = 0; + skb_pull(skb, rtwdev->chip->tx_pkt_desc_sz); info = IEEE80211_SKB_CB(skb); From patchwork Thu Apr 15 08:47:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 12204715 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFADEC43461 for ; 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Thu, 15 Apr 2021 16:47:25 +0800 Received: from localhost (172.21.69.146) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 15 Apr 2021 16:47:24 +0800 From: Ping-Ke Shih To: , CC: , , , , Subject: [PATCH 3/3] rtw88: refine napi deinit flow Date: Thu, 15 Apr 2021 16:47:03 +0800 Message-ID: <20210415084703.27255-4-pkshih@realtek.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210415084703.27255-1-pkshih@realtek.com> References: <20210415084703.27255-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.146] X-ClientProxiedBy: RTEXMBS03.realtek.com.tw (172.21.6.96) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIxLzQvMTUgpFekyCAwNjow?= =?big5_tw?b?MDowMA==?= X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-AntiSpam-Outbound-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 04/15/2021 08:05:31 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 163124 [Apr 15 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: pkshih@realtek.com X-KSE-AntiSpam-Info: LuaCore: 442 442 b985cb57763b61d2a20abb585d5d4cc10c315b09 X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: realtek.com:7.1.1;127.0.0.199:7.1.2;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-KSE-AntiSpam-Info: {Track_Chinese_Simplified, headers_charset} X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 04/15/2021 08:07:00 X-KSE-ServerInfo: RTEXH36502.realtek.com.tw, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIxLzQvMTUgpFekyCAwNzox?= =?big5_tw?b?MDowMA==?= X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-AntiSpam-Outbound-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 04/15/2021 08:09:32 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 163124 [Apr 15 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: pkshih@realtek.com X-KSE-AntiSpam-Info: LuaCore: 442 442 b985cb57763b61d2a20abb585d5d4cc10c315b09 X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;127.0.0.199:7.1.2;realtek.com:7.1.1 X-KSE-AntiSpam-Info: {Track_Chinese_Simplified, headers_charset} X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 04/15/2021 08:12:00 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Po-Hao Huang We used to stop napi before disabling irqs. And it turns out to cause some problem when we try to stop device while interrupt arrives. To safely stop pci, we do three steps: 1. disable interrupt 2. synchronize_irq 3. stop_napi Since step 2 and 3 may not finish as expected when interrupt is enabled, use rtwpci->running to decide whether interrupt should be re-enabled at the time. Fixes: 9e2fd29864c5 ("rtw88: add napi support") Signed-off-by: Po-Hao Huang Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw88/pci.c | 19 ++++++++++++++----- drivers/net/wireless/realtek/rtw88/pci.h | 1 + 2 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c index adea3c7551ab..f59a4c462e3b 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.c +++ b/drivers/net/wireless/realtek/rtw88/pci.c @@ -581,23 +581,30 @@ static int rtw_pci_start(struct rtw_dev *rtwdev) { struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; + rtw_pci_napi_start(rtwdev); + spin_lock_bh(&rtwpci->irq_lock); + rtwpci->running = true; rtw_pci_enable_interrupt(rtwdev, rtwpci, false); spin_unlock_bh(&rtwpci->irq_lock); - rtw_pci_napi_start(rtwdev); - return 0; } static void rtw_pci_stop(struct rtw_dev *rtwdev) { struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; + struct pci_dev *pdev = rtwpci->pdev; + spin_lock_bh(&rtwpci->irq_lock); + rtwpci->running = false; + rtw_pci_disable_interrupt(rtwdev, rtwpci); + spin_unlock_bh(&rtwpci->irq_lock); + + synchronize_irq(pdev->irq); rtw_pci_napi_stop(rtwdev); spin_lock_bh(&rtwpci->irq_lock); - rtw_pci_disable_interrupt(rtwdev, rtwpci); rtw_pci_dma_release(rtwdev, rtwpci); spin_unlock_bh(&rtwpci->irq_lock); } @@ -1212,7 +1219,8 @@ static irqreturn_t rtw_pci_interrupt_threadfn(int irq, void *dev) rtw_fw_c2h_cmd_isr(rtwdev); /* all of the jobs for this interrupt have been done */ - rtw_pci_enable_interrupt(rtwdev, rtwpci, rx); + if (rtwpci->running) + rtw_pci_enable_interrupt(rtwdev, rtwpci, rx); spin_unlock_bh(&rtwpci->irq_lock); return IRQ_HANDLED; @@ -1633,7 +1641,8 @@ static int rtw_pci_napi_poll(struct napi_struct *napi, int budget) if (work_done < budget) { napi_complete_done(napi, work_done); spin_lock_bh(&rtwpci->irq_lock); - rtw_pci_enable_interrupt(rtwdev, rtwpci, false); + if (rtwpci->running) + rtw_pci_enable_interrupt(rtwdev, rtwpci, false); spin_unlock_bh(&rtwpci->irq_lock); /* When ISR happens during polling and before napi_complete * while no further data is received. Data on the dma_ring will diff --git a/drivers/net/wireless/realtek/rtw88/pci.h b/drivers/net/wireless/realtek/rtw88/pci.h index e76fc549a788..0ffae887527a 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.h +++ b/drivers/net/wireless/realtek/rtw88/pci.h @@ -211,6 +211,7 @@ struct rtw_pci { spinlock_t irq_lock; u32 irq_mask[4]; bool irq_enabled; + bool running; /* napi structure */ struct net_device netdev;