From nobody Fri Oct 10 13:44:21 2025 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 C9E824C62; Fri, 13 Jun 2025 12:41:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749818502; cv=none; b=TDwmU2GqYp9TgmYS905Z3DzH8dn1OM98akOeg3ildABfKubl5eEwwp26hzsZvFCJJwu6pWtnXZqgBpxGbtpJU5tXIKRds48MRM0aPyEJheeaUrEmB+yrugVMO+mk7rsbNb0mwehvsJnJX9sBrA6hwaSDAH/HdRTXyK8H7z2vfwg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749818502; c=relaxed/simple; bh=giTLJ+/2RucH/mkRA5+WDxp59D+0mIMggRIn0VNkEv4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=hsMMaYX+mch9y1goVgn8W8q/TyJTCMBH11iHtv8VCh1Qdm6Bgri9y/sMKCg1R9TyZLxHBf4ayamLDspXVJpPD4EyttpIxYMWYqTophSbb2wTLhYa4IxxCCMglDWzlE0GM6McKZzpNG78GWUL6VJ5rVrYdUTSeWioMqFDQLeDGZQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=OlEp+BOn; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="OlEp+BOn" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1749818501; x=1781354501; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=giTLJ+/2RucH/mkRA5+WDxp59D+0mIMggRIn0VNkEv4=; b=OlEp+BOnaww7ekBQzluPItDcrZxD/CKKRnqx3XZsI+n0nk5Ehsz4+XGP 5Q5PY03qY6kS+d3j49XpagSaXiaFT//VT8huFdg/cpUgIJdT/T5I9IB6M HEINZ9sflBIs6CmaTN7r/o0BjC5Ho/IsYNx8B0dSYo4TYDNp52Bx5QdCk c+rVO/8PGeUMD8aWPo8giWMZL/4YRtY4YW11cUl9gwT2YZ89HA8Ga+z+E 1o1DhHJtDkmQ4E6OhWJzLTj+IMr/rSz0oPZNS83A9NqGGzucsXG0vspT1 Qf+5Ux+R8icAJIL3otOm02oiey/UDp1b/l74xw5rGyOHmmTLyNTfRtPNT Q==; X-CSE-ConnectionGUID: azB1cd1PQ5KugktCkPM7AQ== X-CSE-MsgGUID: eRyoq8J0TYGz2WzekQsN5w== X-IronPort-AV: E=McAfee;i="6800,10657,11463"; a="51950724" X-IronPort-AV: E=Sophos;i="6.16,233,1744095600"; d="scan'208";a="51950724" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2025 05:41:40 -0700 X-CSE-ConnectionGUID: n8tF8Yz0QwiCWknZ06KL+g== X-CSE-MsgGUID: vMnjFekSRBC0d5y9HQttIQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,233,1744095600"; d="scan'208";a="153110069" Received: from ubuntu.bj.intel.com ([10.238.156.109]) by orviesa005.jf.intel.com with ESMTP; 13 Jun 2025 05:41:37 -0700 From: Jun Miao To: kuba@kernel.org, oneukum@suse.com, sbhatta@marvell.com Cc: netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, jun.miao@intel.com, qiang.zhang@linux.dev Subject: [PATCH v1] net: usb: Convert tasklet API to new bottom half workqueue mechanism Date: Fri, 13 Jun 2025 20:43:18 +0800 Message-Id: <20250613124318.2451947-1-jun.miao@intel.com> X-Mailer: git-send-email 2.32.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Migrate tasklet APIs to the new bottom half workqueue mechanism. It replaces all occurrences of tasklet usage with the appropriate workqueue APIs throughout the usbnet driver. This transition ensures compatibility with the latest design and enhances performance. Signed-off-by: Jun Miao --- drivers/net/usb/usbnet.c | 36 ++++++++++++++++++------------------ include/linux/usb/usbnet.h | 2 +- 2 files changed, 19 insertions(+), 19 deletions(-) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index c04e715a4c2a..566127b4e0ba 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -461,7 +461,7 @@ static enum skb_state defer_bh(struct usbnet *dev, stru= ct sk_buff *skb, =20 __skb_queue_tail(&dev->done, skb); if (dev->done.qlen =3D=3D 1) - tasklet_schedule(&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); spin_unlock(&dev->done.lock); spin_unlock_irqrestore(&list->lock, flags); return old_state; @@ -549,7 +549,7 @@ static int rx_submit (struct usbnet *dev, struct urb *u= rb, gfp_t flags) default: netif_dbg(dev, rx_err, dev->net, "rx submit, %d\n", retval); - tasklet_schedule (&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); break; case 0: __usbnet_queue_skb(&dev->rxq, skb, rx_start); @@ -709,7 +709,7 @@ void usbnet_resume_rx(struct usbnet *dev) num++; } =20 - tasklet_schedule(&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); =20 netif_dbg(dev, rx_status, dev->net, "paused rx queue disabled, %d skbs requeued\n", num); @@ -778,7 +778,7 @@ void usbnet_unlink_rx_urbs(struct usbnet *dev) { if (netif_running(dev->net)) { (void) unlink_urbs (dev, &dev->rxq); - tasklet_schedule(&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); } } EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); @@ -861,14 +861,14 @@ int usbnet_stop (struct net_device *net) /* deferred work (timer, softirq, task) must also stop */ dev->flags =3D 0; timer_delete_sync(&dev->delay); - tasklet_kill(&dev->bh); + disable_work_sync(&dev->bh_work); cancel_work_sync(&dev->kevent); =20 /* We have cyclic dependencies. Those calls are needed * to break a cycle. We cannot fall into the gaps because * we have a flag */ - tasklet_kill(&dev->bh); + disable_work_sync(&dev->bh_work); timer_delete_sync(&dev->delay); cancel_work_sync(&dev->kevent); =20 @@ -955,7 +955,7 @@ int usbnet_open (struct net_device *net) clear_bit(EVENT_RX_KILL, &dev->flags); =20 // delay posting reads until we're fully open - tasklet_schedule (&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); if (info->manage_power) { retval =3D info->manage_power(dev, 1); if (retval < 0) { @@ -1123,7 +1123,7 @@ static void __handle_link_change(struct usbnet *dev) */ } else { /* submitting URBs for reading packets */ - tasklet_schedule(&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); } =20 /* hard_mtu or rx_urb_size may change during link change */ @@ -1198,11 +1198,11 @@ usbnet_deferred_kevent (struct work_struct *work) } else { clear_bit (EVENT_RX_HALT, &dev->flags); if (!usbnet_going_away(dev)) - tasklet_schedule(&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); } } =20 - /* tasklet could resubmit itself forever if memory is tight */ + /* workqueue could resubmit itself forever if memory is tight */ if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { struct urb *urb =3D NULL; int resched =3D 1; @@ -1224,7 +1224,7 @@ usbnet_deferred_kevent (struct work_struct *work) fail_lowmem: if (resched) if (!usbnet_going_away(dev)) - tasklet_schedule(&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); } } =20 @@ -1325,7 +1325,7 @@ void usbnet_tx_timeout (struct net_device *net, unsig= ned int txqueue) struct usbnet *dev =3D netdev_priv(net); =20 unlink_urbs (dev, &dev->txq); - tasklet_schedule (&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); /* this needs to be handled individually because the generic layer * doesn't know what is sufficient and could not restore private * information if a remedy of an unconditional reset were used. @@ -1547,7 +1547,7 @@ static inline void usb_free_skb(struct sk_buff *skb) =20 /*------------------------------------------------------------------------= -*/ =20 -// tasklet (work deferred from completions, in_irq) or timer +// workqueue (work deferred from completions, in_irq) or timer =20 static void usbnet_bh (struct timer_list *t) { @@ -1601,16 +1601,16 @@ static void usbnet_bh (struct timer_list *t) "rxqlen %d --> %d\n", temp, dev->rxq.qlen); if (dev->rxq.qlen < RX_QLEN(dev)) - tasklet_schedule (&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); } if (dev->txq.qlen < TX_QLEN (dev)) netif_wake_queue (dev->net); } } =20 -static void usbnet_bh_tasklet(struct tasklet_struct *t) +static void usbnet_bh_workqueue(struct work_struct *work) { - struct usbnet *dev =3D from_tasklet(dev, t, bh); + struct usbnet *dev =3D from_work(dev, work, bh_work); =20 usbnet_bh(&dev->delay); } @@ -1742,7 +1742,7 @@ usbnet_probe (struct usb_interface *udev, const struc= t usb_device_id *prod) skb_queue_head_init (&dev->txq); skb_queue_head_init (&dev->done); skb_queue_head_init(&dev->rxq_pause); - tasklet_setup(&dev->bh, usbnet_bh_tasklet); + INIT_WORK (&dev->bh_work, usbnet_bh_workqueue); INIT_WORK (&dev->kevent, usbnet_deferred_kevent); init_usb_anchor(&dev->deferred); timer_setup(&dev->delay, usbnet_bh, 0); @@ -1971,7 +1971,7 @@ int usbnet_resume (struct usb_interface *intf) =20 if (!(dev->txq.qlen >=3D TX_QLEN(dev))) netif_tx_wake_all_queues(dev->net); - tasklet_schedule (&dev->bh); + queue_work(system_bh_wq, &dev->bh_work); } } =20 diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h index 0b9f1e598e3a..208682f77179 100644 --- a/include/linux/usb/usbnet.h +++ b/include/linux/usb/usbnet.h @@ -58,7 +58,7 @@ struct usbnet { unsigned interrupt_count; struct mutex interrupt_mutex; struct usb_anchor deferred; - struct tasklet_struct bh; + struct work_struct bh_work; =20 struct work_struct kevent; unsigned long flags; --=20 2.32.0