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Miller" , =?utf-8?b?SsOpcsO0bWUgUG91?= =?utf-8?q?iller?= Subject: [PATCH 19/65] staging: wfx: fix __wfx_flush() when drop == false Thread-Topic: [PATCH 19/65] staging: wfx: fix __wfx_flush() when drop == false Thread-Index: AQHVy50ROBMg+v6CA0G5VLJRshsWqg== Date: Wed, 15 Jan 2020 12:12:34 +0000 Message-ID: <20200115121041.10863-20-Jerome.Pouiller@silabs.com> References: <20200115121041.10863-1-Jerome.Pouiller@silabs.com> In-Reply-To: <20200115121041.10863-1-Jerome.Pouiller@silabs.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: PR2PR09CA0009.eurprd09.prod.outlook.com (2603:10a6:101:16::21) To MN2PR11MB4063.namprd11.prod.outlook.com (2603:10b6:208:13f::22) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Jerome.Pouiller@silabs.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.25.0 x-originating-ip: [37.71.187.125] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 7fd5b2cd-36b5-41b5-d03a-08d799b4342f x-ms-traffictypediagnostic: MN2PR11MB3934: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4941; x-forefront-prvs: 02830F0362 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(39850400004)(396003)(136003)(376002)(366004)(346002)(199004)(189003)(54906003)(110136005)(86362001)(956004)(107886003)(2616005)(316002)(36756003)(71200400001)(52116002)(7696005)(478600001)(8936002)(81156014)(8676002)(4326008)(81166006)(6486002)(2906002)(26005)(66946007)(16526019)(186003)(5660300002)(66574012)(1076003)(66556008)(64756008)(66446008)(85182001)(66476007)(85202003); DIR:OUT; SFP:1101; SCL:1; SRVR:MN2PR11MB3934; H:MN2PR11MB4063.namprd11.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: silabs.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: QTKzTObCJ3EziBd/aRPvpBy91zeCyy4/Tnwn1hy/2nlPkNOqoWnxVzughdiA0+A9a1LrJncMPiGtz9qIh1VH9NDsiOWYuPQfLSPcIpsl+6hts/g4w1WGOs4WtF1o6DeoaAp3Fk6ItQpY3ufSFWDtrWS0nbzMX1fs1ucr3Ez+GBrphGKK+Q742dDlPby4U/QlsgUlAJTzWFjVitYlPOgQV5D182jxAuGaE5qqwrHVHTZS3LJcKpt0xH+FR3rSGjwX7pFG2Iai1uGR+WJlD06SopNg7LR5tcPAiO5BUi7wtK19RMVFlyc0gDnbb7k2Rmu+kPB2E8w9iKhcuJijDKNiy4Wz6Jx1+Fzi+1sK+vAU4sEkQdXybPUkWFPKU188S+3NVx2vm9/2dPCUJPOW5V0rigEn+HvM1Q5aBkxr/euV4KYcjBBjXIcTW7KYhSk/lkeQ Content-ID: <5B443518F7D18A40B3FD716F3E52EC9A@namprd11.prod.outlook.com> MIME-Version: 1.0 X-OriginatorOrg: silabs.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7fd5b2cd-36b5-41b5-d03a-08d799b4342f X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Jan 2020 12:12:34.6585 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 54dbd822-5231-4b20-944d-6f4abcd541fb X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 5leVy8NqAAfjL6mK14t/iRLQEiyBLtp4gNwGjTTPUBycbHm55ZGEfzsWajxDVwFA1aVpIchgfjWtCbXEd+T6VA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB3934 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Jérôme Pouiller wfx_tx_queues_clear() only clear not yet sent requests. So, it always necessary to wait for tx_queue_stats.wait_link_id_empty whatever the value of "drop" argument. In add, it is not necessary to return with tx queue locked since all calls to __wfx_flush() unlock the tx queue just after the call to __wfx_tx_flush(). Signed-off-by: Jérôme Pouiller --- drivers/staging/wfx/queue.c | 2 -- drivers/staging/wfx/sta.c | 42 ++++++++++--------------------------- 2 files changed, 11 insertions(+), 33 deletions(-) diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c index abfbad7c9f75..92bb9a794f30 100644 --- a/drivers/staging/wfx/queue.c +++ b/drivers/staging/wfx/queue.c @@ -31,8 +31,6 @@ void wfx_tx_flush(struct wfx_dev *wdev) { int ret; - WARN(!atomic_read(&wdev->tx_lock), "tx_lock is not locked"); - // Do not wait for any reply if chip is frozen if (wdev->chip_frozen) return; diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c index 0c73691ab736..3d665eef8ba7 100644 --- a/drivers/staging/wfx/sta.c +++ b/drivers/staging/wfx/sta.c @@ -343,42 +343,25 @@ int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value) return 0; } -/* If successful, LOCKS the TX queue! */ static int __wfx_flush(struct wfx_dev *wdev, bool drop) { - int ret; - for (;;) { - if (drop) { + if (drop) wfx_tx_queues_clear(wdev); - } else { - ret = wait_event_timeout( - wdev->tx_queue_stats.wait_link_id_empty, - wfx_tx_queues_is_empty(wdev), - 2 * HZ); - } - - if (!drop && ret <= 0) { - ret = -ETIMEDOUT; - break; - } - ret = 0; - - wfx_tx_lock_flush(wdev); - if (!wfx_tx_queues_is_empty(wdev)) { - /* Highly unlikely: WSM requeued frames. */ - wfx_tx_unlock(wdev); - continue; - } - break; + if (wait_event_timeout(wdev->tx_queue_stats.wait_link_id_empty, + wfx_tx_queues_is_empty(wdev), + 2 * HZ) <= 0) + return -ETIMEDOUT; + wfx_tx_flush(wdev); + if (wfx_tx_queues_is_empty(wdev)) + return 0; + dev_warn(wdev->dev, "frames queued while flushing tx queues"); } - return ret; } void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u32 queues, bool drop) { - struct wfx_dev *wdev = hw->priv; struct wfx_vif *wvif; if (vif) { @@ -389,10 +372,8 @@ void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, !wvif->enable_beacon) drop = true; } - // FIXME: only flush requested vif - if (!__wfx_flush(wdev, drop)) - wfx_tx_unlock(wdev); + __wfx_flush(hw->priv, drop); } /* WSM callbacks */ @@ -1046,8 +1027,7 @@ static int wfx_set_tim_impl(struct wfx_vif *wvif, bool aid0_bit_set) skb = ieee80211_beacon_get_tim(wvif->wdev->hw, wvif->vif, &tim_offset, &tim_length); if (!skb) { - if (!__wfx_flush(wvif->wdev, true)) - wfx_tx_unlock(wvif->wdev); + __wfx_flush(wvif->wdev, true); return -ENOENT; } tim_ptr = skb->data + tim_offset;