From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD76270838; Mon, 23 Jun 2025 21:09:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750712992; cv=none; b=YBiiLxUwF3p0brVIw8llo/J9kdv25JDOeEIuWh+fxZ/G81VeQAPogsrqnMu9IjIk/QD9HYpQCbiIbFXcacQc7IwLuxFqDhzOe+j4xR05r9MWzmaXuTwUOvp5eLFa4d84/OFyFT8lrKQk88jBjAsEVE+XiTKJcRohouFah2YwpF4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750712992; c=relaxed/simple; bh=eP72x9/b03hRRjaoufwFZH2t4qq98ZgF9CAnX05/UFE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sYNGqBZaI8o95XZqazcMu0VT3N1X7xuP5xj5da4MgCnDMR+n66bBXCsWilIh420u2AzPT5J9JyyEIbdzeiDQQuF3J0Dby9epLBVWY5Trg3g7EO/uUkPANYQxH99t6PH7xV+1URzBnKzUCd8lsDAxYCq/gS5P9b8DytaAE+lhy4w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=gUkfmlpt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="gUkfmlpt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45908C4CEEA; Mon, 23 Jun 2025 21:09:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750712992; bh=eP72x9/b03hRRjaoufwFZH2t4qq98ZgF9CAnX05/UFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gUkfmlptu2CLp9C+5RT0aVF4l+MGFS/r99yn1eKCoaU9J9WlNhx/xRhT8+91iai1J fna8XDryIP9pCIz3+OiUmWaEIJ9OVLTCeiVdMJMfIkTT/vVF+Fbo4RgAw3V89lLF8b D1w8pelJZPNNNl8OSdSrPjACBsXBpRceG/0kYx40= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wen Gong , Kalle Valo , Sasha Levin Subject: [PATCH 5.10 116/355] ath10k: add atomic protection for device recovery Date: Mon, 23 Jun 2025 15:05:17 +0200 Message-ID: <20250623130630.248176479@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130626.716971725@linuxfoundation.org> References: <20250623130626.716971725@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wen Gong [ Upstream commit 5dadbe4e3718fb2214199b6dc7af1077fe14bf32 ] When it has more than one restart_work queued meanwhile, the 2nd restart_work is very easy to break the 1st restart work and lead recovery fail. Add a flag to allow only one restart work running untill device successfully recovered. It already has flag ATH10K_FLAG_CRASH_FLUSH, but it can not use this flag again, because it is clear in ath10k_core_start. The function ieee80211_reconfig(called by ieee80211_restart_work) of mac80211 do many things and drv_start(call to ath10k_core_start) is 1st thing, when drv_start complete, it does not mean restart complete. So it add new flag and clear it in ath10k_reconfig_complete, because it is the last thing called from drv_reconfig_complete of function ieee80211_reconfig, after it, the restart process finished. Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049 Signed-off-by: Wen Gong Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/010101746bead6a0-d5e97c66-dedd-4b92-810e-c2e4840fafc9-000000@us-west-2.amazonses.com Stable-dep-of: 1650d32b92b0 ("ath10k: snoc: fix unbalanced IRQ enable in crash recovery") Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath10k/core.c | 11 +++++++++++ drivers/net/wireless/ath/ath10k/core.h | 4 ++++ drivers/net/wireless/ath/ath10k/debug.c | 6 +++--- drivers/net/wireless/ath/ath10k/mac.c | 1 + drivers/net/wireless/ath/ath10k/pci.c | 2 +- drivers/net/wireless/ath/ath10k/sdio.c | 6 +++--- drivers/net/wireless/ath/ath10k/snoc.c | 2 +- drivers/net/wireless/ath/ath10k/wmi.c | 2 +- 8 files changed, 25 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index d03a36c45f9f3..8ce5fbfcee972 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -2292,6 +2292,17 @@ static int ath10k_init_hw_params(struct ath10k *ar) return 0; } +void ath10k_core_start_recovery(struct ath10k *ar) +{ + if (test_and_set_bit(ATH10K_FLAG_RESTARTING, &ar->dev_flags)) { + ath10k_warn(ar, "already restarting\n"); + return; + } + + queue_work(ar->workqueue, &ar->restart_work); +} +EXPORT_SYMBOL(ath10k_core_start_recovery); + static void ath10k_core_restart(struct work_struct *work) { struct ath10k *ar = container_of(work, struct ath10k, restart_work); diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index b50ab9e229dc5..b471c0ccf006b 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -857,6 +857,9 @@ enum ath10k_dev_flags { /* Per Station statistics service */ ATH10K_FLAG_PEER_STATS, + + /* Indicates that ath10k device is during recovery process and not complete */ + ATH10K_FLAG_RESTARTING, }; enum ath10k_cal_mode { @@ -1312,6 +1315,7 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode, const struct ath10k_fw_components *fw_components); int ath10k_wait_for_suspend(struct ath10k *ar, u32 suspend_opt); void ath10k_core_stop(struct ath10k *ar); +void ath10k_core_start_recovery(struct ath10k *ar); int ath10k_core_register(struct ath10k *ar, const struct ath10k_bus_params *bus_params); void ath10k_core_unregister(struct ath10k *ar); diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c index ab737177a86bf..64d48d8cce50c 100644 --- a/drivers/net/wireless/ath/ath10k/debug.c +++ b/drivers/net/wireless/ath/ath10k/debug.c @@ -583,7 +583,7 @@ static ssize_t ath10k_write_simulate_fw_crash(struct file *file, ret = ath10k_debug_fw_assert(ar); } else if (!strcmp(buf, "hw-restart")) { ath10k_info(ar, "user requested hw restart\n"); - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); ret = 0; } else { ret = -EINVAL; @@ -2005,7 +2005,7 @@ static ssize_t ath10k_write_btcoex(struct file *file, } } else { ath10k_info(ar, "restarting firmware due to btcoex change"); - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); } if (val) @@ -2136,7 +2136,7 @@ static ssize_t ath10k_write_peer_stats(struct file *file, ath10k_info(ar, "restarting firmware due to Peer stats change"); - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); ret = count; exit: diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 323b6763cb0f5..5dd0239e9d51b 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -7969,6 +7969,7 @@ static void ath10k_reconfig_complete(struct ieee80211_hw *hw, ath10k_info(ar, "device successfully recovered\n"); ar->state = ATH10K_STATE_ON; ieee80211_wake_queues(ar->hw); + clear_bit(ATH10K_FLAG_RESTARTING, &ar->dev_flags); } mutex_unlock(&ar->conf_mutex); diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 2c8f04b415c71..83ef0517f0991 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -1774,7 +1774,7 @@ static void ath10k_pci_fw_dump_work(struct work_struct *work) mutex_unlock(&ar->dump_mutex); - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); } static void ath10k_pci_fw_crashed_dump(struct ath10k *ar) diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c index 418e40560f59f..2ccbb6b4f1b5b 100644 --- a/drivers/net/wireless/ath/ath10k/sdio.c +++ b/drivers/net/wireless/ath/ath10k/sdio.c @@ -562,7 +562,7 @@ static int ath10k_sdio_mbox_rx_alloc(struct ath10k *ar, ATH10K_HTC_MBOX_MAX_PAYLOAD_LENGTH); ret = -ENOMEM; - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); ath10k_warn(ar, "exceeds length, start recovery\n"); goto err; @@ -961,7 +961,7 @@ static int ath10k_sdio_mbox_read_int_status(struct ath10k *ar, ret = ath10k_sdio_read(ar, MBOX_HOST_INT_STATUS_ADDRESS, irq_proc_reg, sizeof(*irq_proc_reg)); if (ret) { - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); ath10k_warn(ar, "read int status fail, start recovery\n"); goto out; } @@ -2505,7 +2505,7 @@ void ath10k_sdio_fw_crashed_dump(struct ath10k *ar) ath10k_sdio_enable_intrs(ar); - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); } static int ath10k_sdio_probe(struct sdio_func *func, diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c index f7ee1032b1729..ee5b16d79f14f 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.c +++ b/drivers/net/wireless/ath/ath10k/snoc.c @@ -1315,7 +1315,7 @@ int ath10k_snoc_fw_indication(struct ath10k *ar, u64 type) switch (type) { case ATH10K_QMI_EVENT_FW_READY_IND: if (test_bit(ATH10K_SNOC_FLAG_REGISTERED, &ar_snoc->flags)) { - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); break; } diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index dc5d9f9be34f0..c9a74f3e2e601 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -1957,7 +1957,7 @@ int ath10k_wmi_cmd_send(struct ath10k *ar, struct sk_buff *skb, u32 cmd_id) if (ret == -EAGAIN) { ath10k_warn(ar, "wmi command %d timeout, restarting hardware\n", cmd_id); - queue_work(ar->workqueue, &ar->restart_work); + ath10k_core_start_recovery(ar); } return ret; -- 2.39.5