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dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=i4/Kpt1y; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="i4/Kpt1y" Received: from apais-vm1.0synte4vioeebbvidf5q0vz2ua.xx.internal.cloudapp.net (unknown [52.183.86.224]) by linux.microsoft.com (Postfix) with ESMTPSA id B67C22085D1E; Wed, 27 Mar 2024 09:03:21 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com B67C22085D1E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1711555401; bh=L+EaQYE6bmC0NmpKbej3vSebLXDc+7QE0yduDZxBc6Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i4/Kpt1ytuQ6twRTLZVIQaRVaylPWpPRuZ/NEIZhO9GR3p4i9dCOg2rRWFziifVBd 44/8wdUf040mbtr1lR1T8QuVT2Y9J40Gp4vU/0G2vEzJHItl+AyUjVmrLFqfhd/x/Y 592HY7hG50dsYQj8koAdQJbxgQxXsP6fUJYBiSDI= From: Allen Pais To: linux-kernel@vger.kernel.org Cc: tj@kernel.org, keescook@chromium.org, vkoul@kernel.org, marcan@marcan.st, sven@svenpeter.dev, florian.fainelli@broadcom.com, rjui@broadcom.com, sbranden@broadcom.com, paul@crapouillou.net, Eugeniy.Paltsev@synopsys.com, manivannan.sadhasivam@linaro.org, vireshk@kernel.org, Frank.Li@nxp.com, leoyang.li@nxp.com, zw@zh-kernel.org, wangzhou1@hisilicon.com, haijie1@huawei.com, shawnguo@kernel.org, s.hauer@pengutronix.de, sean.wang@mediatek.com, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, afaerber@suse.de, logang@deltatee.com, daniel@zonque.org, haojian.zhuang@gmail.com, robert.jarzmik@free.fr, andersson@kernel.org, konrad.dybcio@linaro.org, orsonzhai@gmail.com, baolin.wang@linux.alibaba.com, zhang.lyra@gmail.com, patrice.chotard@foss.st.com, linus.walleij@linaro.org, wens@csie.org, jernej.skrabec@gmail.com, peter.ujfalusi@gmail.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jassisinghbrar@gmail.com, mchehab@kernel.org, maintainers@bluecherrydvr.com, aubin.constans@microchip.com, ulf.hansson@linaro.org, manuel.lauss@gmail.com, mirq-linux@rere.qmqm.pl, jh80.chung@samsung.com, oakad@yahoo.com, hayashi.kunihiko@socionext.com, mhiramat@kernel.org, brucechang@via.com.tw, HaraldWelte@viatech.com, pierre@ossman.eu, duncan.sands@free.fr, stern@rowland.harvard.edu, oneukum@suse.com, openipmi-developer@lists.sourceforge.net, dmaengine@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, linux-mips@vger.kernel.org, imx@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-mediatek@lists.infradead.org, linux-actions@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH 4/9] USB: Convert from tasklet to BH workqueue Date: Wed, 27 Mar 2024 16:03:09 +0000 Message-Id: <20240327160314.9982-5-apais@linux.microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240327160314.9982-1-apais@linux.microsoft.com> References: <20240327160314.9982-1-apais@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The only generic interface to execute asynchronously in the BH context is tasklet; however, it's marked deprecated and has some design flaws. To replace tasklets, BH workqueue support was recently added. A BH workqueue behaves similarly to regular workqueues except that the queued work items are executed in the BH context. This patch converts drivers/infiniband/* from tasklet to BH workqueue. Based on the work done by Tejun Heo Branch: https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-6.10 Signed-off-by: Allen Pais --- drivers/usb/atm/usbatm.c | 55 +++++++++++++++-------------- drivers/usb/atm/usbatm.h | 3 +- drivers/usb/core/hcd.c | 22 ++++++------ drivers/usb/gadget/udc/fsl_qe_udc.c | 21 +++++------ drivers/usb/gadget/udc/fsl_qe_udc.h | 4 +-- drivers/usb/host/ehci-sched.c | 2 +- drivers/usb/host/fhci-hcd.c | 3 +- drivers/usb/host/fhci-sched.c | 10 +++--- drivers/usb/host/fhci.h | 5 +-- drivers/usb/host/xhci-dbgcap.h | 3 +- drivers/usb/host/xhci-dbgtty.c | 15 ++++---- include/linux/usb/cdc_ncm.h | 2 +- include/linux/usb/usbnet.h | 2 +- 13 files changed, 76 insertions(+), 71 deletions(-) diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c index 2da6615fbb6f..74849f24e52e 100644 --- a/drivers/usb/atm/usbatm.c +++ b/drivers/usb/atm/usbatm.c @@ -17,7 +17,7 @@ * - Removed the limit on the number of devices * - Module now autoloads on device plugin * - Merged relevant parts of sarlib - * - Replaced the kernel thread with a tasklet + * - Replaced the kernel thread with a work * - New packet transmission code * - Changed proc file contents * - Fixed all known SMP races @@ -68,6 +68,7 @@ #include #include #include +#include =20 #ifdef VERBOSE_DEBUG static int usbatm_print_packet(struct usbatm_data *instance, const unsigne= d char *data, int len); @@ -249,7 +250,7 @@ static void usbatm_complete(struct urb *urb) /* vdbg("%s: urb 0x%p, status %d, actual_length %d", __func__, urb, status, urb->actual_length); */ =20 - /* Can be invoked from task context, protect against interrupts */ + /* Can be invoked from work context, protect against interrupts */ spin_lock_irqsave(&channel->lock, flags); =20 /* must add to the back when receiving; doesn't matter when sending */ @@ -269,7 +270,7 @@ static void usbatm_complete(struct urb *urb) /* throttle processing in case of an error */ mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS)); } else - tasklet_schedule(&channel->tasklet); + queue_work(system_bh_wq, &channel->work); } =20 =20 @@ -511,10 +512,10 @@ static unsigned int usbatm_write_cells(struct usbatm_= data *instance, ** receive ** **************/ =20 -static void usbatm_rx_process(struct tasklet_struct *t) +static void usbatm_rx_process(struct work_struct *t) { - struct usbatm_data *instance =3D from_tasklet(instance, t, - rx_channel.tasklet); + struct usbatm_data *instance =3D from_work(instance, t, + rx_channel.work); struct urb *urb; =20 while ((urb =3D usbatm_pop_urb(&instance->rx_channel))) { @@ -565,10 +566,10 @@ static void usbatm_rx_process(struct tasklet_struct *= t) ** send ** ***********/ =20 -static void usbatm_tx_process(struct tasklet_struct *t) +static void usbatm_tx_process(struct work_struct *t) { - struct usbatm_data *instance =3D from_tasklet(instance, t, - tx_channel.tasklet); + struct usbatm_data *instance =3D from_work(instance, t, + tx_channel.work); struct sk_buff *skb =3D instance->current_skb; struct urb *urb =3D NULL; const unsigned int buf_size =3D instance->tx_channel.buf_size; @@ -632,13 +633,13 @@ static void usbatm_cancel_send(struct usbatm_data *in= stance, } spin_unlock_irq(&instance->sndqueue.lock); =20 - tasklet_disable(&instance->tx_channel.tasklet); + disable_work_sync(&instance->tx_channel.work); if ((skb =3D instance->current_skb) && (UDSL_SKB(skb)->atm.vcc =3D=3D vcc= )) { atm_dbg(instance, "%s: popping current skb (0x%p)\n", __func__, skb); instance->current_skb =3D NULL; usbatm_pop(vcc, skb); } - tasklet_enable(&instance->tx_channel.tasklet); + enable_and_queue_work(system_bh_wq, &instance->tx_channel.work); } =20 static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) @@ -677,7 +678,7 @@ static int usbatm_atm_send(struct atm_vcc *vcc, struct = sk_buff *skb) ctrl->crc =3D crc32_be(~0, skb->data, skb->len); =20 skb_queue_tail(&instance->sndqueue, skb); - tasklet_schedule(&instance->tx_channel.tasklet); + queue_work(system_bh_wq, &instance->tx_channel.work); =20 return 0; =20 @@ -695,8 +696,8 @@ static void usbatm_destroy_instance(struct kref *kref) { struct usbatm_data *instance =3D container_of(kref, struct usbatm_data, r= efcount); =20 - tasklet_kill(&instance->rx_channel.tasklet); - tasklet_kill(&instance->tx_channel.tasklet); + cancel_work_sync(&instance->rx_channel.work); + cancel_work_sync(&instance->tx_channel.work); usb_put_dev(instance->usb_dev); kfree(instance); } @@ -823,12 +824,12 @@ static int usbatm_atm_open(struct atm_vcc *vcc) =20 vcc->dev_data =3D new; =20 - tasklet_disable(&instance->rx_channel.tasklet); + disable_work_sync(&instance->rx_channel.work); instance->cached_vcc =3D new; instance->cached_vpi =3D vpi; instance->cached_vci =3D vci; list_add(&new->list, &instance->vcc_list); - tasklet_enable(&instance->rx_channel.tasklet); + enable_and_queue_work(system_bh_wq, &instance->rx_channel.work); =20 set_bit(ATM_VF_ADDR, &vcc->flags); set_bit(ATM_VF_PARTIAL, &vcc->flags); @@ -858,14 +859,14 @@ static void usbatm_atm_close(struct atm_vcc *vcc) =20 mutex_lock(&instance->serialize); /* vs self, usbatm_atm_open, usbatm_usb= _disconnect */ =20 - tasklet_disable(&instance->rx_channel.tasklet); + disable_work_sync(&instance->rx_channel.work); if (instance->cached_vcc =3D=3D vcc_data) { instance->cached_vcc =3D NULL; instance->cached_vpi =3D ATM_VPI_UNSPEC; instance->cached_vci =3D ATM_VCI_UNSPEC; } list_del(&vcc_data->list); - tasklet_enable(&instance->rx_channel.tasklet); + enable_and_queue_work(system_bh_wq, &instance->rx_channel.work); =20 kfree_skb(vcc_data->sarb); vcc_data->sarb =3D NULL; @@ -991,18 +992,18 @@ static int usbatm_heavy_init(struct usbatm_data *inst= ance) return 0; } =20 -static void usbatm_tasklet_schedule(struct timer_list *t) +static void usbatm_queue_work(system_bh_wq, struct timer_list *t) { struct usbatm_channel *channel =3D from_timer(channel, t, delay); =20 - tasklet_schedule(&channel->tasklet); + queue_work(system_bh_wq, &channel->work); } =20 static void usbatm_init_channel(struct usbatm_channel *channel) { spin_lock_init(&channel->lock); INIT_LIST_HEAD(&channel->list); - timer_setup(&channel->delay, usbatm_tasklet_schedule, 0); + timer_setup(&channel->delay, usbatm_queue_work, 0); } =20 int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_i= d *id, @@ -1074,8 +1075,8 @@ int usbatm_usb_probe(struct usb_interface *intf, cons= t struct usb_device_id *id, =20 usbatm_init_channel(&instance->rx_channel); usbatm_init_channel(&instance->tx_channel); - tasklet_setup(&instance->rx_channel.tasklet, usbatm_rx_process); - tasklet_setup(&instance->tx_channel.tasklet, usbatm_tx_process); + INIT_WORK(&instance->rx_channel.work, usbatm_rx_process); + INIT_WORK(&instance->tx_channel.work, usbatm_tx_process); instance->rx_channel.stride =3D ATM_CELL_SIZE + driver->rx_padding; instance->tx_channel.stride =3D ATM_CELL_SIZE + driver->tx_padding; instance->rx_channel.usbatm =3D instance->tx_channel.usbatm =3D instance; @@ -1231,8 +1232,8 @@ void usbatm_usb_disconnect(struct usb_interface *intf) vcc_release_async(vcc_data->vcc, -EPIPE); mutex_unlock(&instance->serialize); =20 - tasklet_disable(&instance->rx_channel.tasklet); - tasklet_disable(&instance->tx_channel.tasklet); + disable_work_sync(&instance->rx_channel.work); + disable_work_sync(&instance->tx_channel.work); =20 for (i =3D 0; i < num_rcv_urbs + num_snd_urbs; i++) usb_kill_urb(instance->urbs[i]); @@ -1245,8 +1246,8 @@ void usbatm_usb_disconnect(struct usb_interface *intf) INIT_LIST_HEAD(&instance->rx_channel.list); INIT_LIST_HEAD(&instance->tx_channel.list); =20 - tasklet_enable(&instance->rx_channel.tasklet); - tasklet_enable(&instance->tx_channel.tasklet); + enable_and_queue_work(system_bh_wq, &instance->rx_channel.work); + enable_and_queue_work(system_bh_wq, &instance->tx_channel.work); =20 if (instance->atm_dev && instance->driver->atm_stop) instance->driver->atm_stop(instance, instance->atm_dev); diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h index d96658e2e209..3452f8c2e1e5 100644 --- a/drivers/usb/atm/usbatm.h +++ b/drivers/usb/atm/usbatm.h @@ -21,6 +21,7 @@ #include #include #include +#include =20 /* #define VERBOSE_DEBUG @@ -109,7 +110,7 @@ struct usbatm_channel { unsigned int packet_size; /* endpoint maxpacket */ spinlock_t lock; struct list_head list; - struct tasklet_struct tasklet; + struct work_struct work; struct timer_list delay; struct usbatm_data *usbatm; }; diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index c0e005670d67..88d8e1c366cd 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -37,6 +37,7 @@ #include #include #include +#include =20 #include "usb.h" #include "phy.h" @@ -884,7 +885,7 @@ static void usb_bus_init (struct usb_bus *bus) * usb_register_bus - registers the USB host controller with the usb core * @bus: pointer to the bus to register * - * Context: task context, might sleep. + * Context: work context, might sleep. * * Assigns a bus number, and links the controller into usbcore data * structures so that it can be seen by scanning the bus list. @@ -920,7 +921,7 @@ static int usb_register_bus(struct usb_bus *bus) * usb_deregister_bus - deregisters the USB host controller * @bus: pointer to the bus to deregister * - * Context: task context, might sleep. + * Context: work context, might sleep. * * Recycles the bus number, and unlinks the controller from usbcore data * structures so that it won't be seen by scanning the bus list. @@ -1640,7 +1641,7 @@ static void __usb_hcd_giveback_urb(struct urb *urb) /* pass ownership to the completion handler */ urb->status =3D status; /* - * This function can be called in task context inside another remote + * This function can be called in work context inside another remote * coverage collection section, but kcov doesn't support that kind of * recursion yet. Only collect coverage in softirq context for now. */ @@ -1662,10 +1663,9 @@ static void __usb_hcd_giveback_urb(struct urb *urb) usb_put_urb(urb); } =20 -static void usb_giveback_urb_bh(struct work_struct *work) +static void usb_giveback_urb_bh(struct work_struct *t) { - struct giveback_urb_bh *bh =3D - container_of(work, struct giveback_urb_bh, bh); + struct giveback_urb_bh *bh =3D from_work(bh, t, bh); struct list_head local_list; =20 spin_lock_irq(&bh->lock); @@ -1705,7 +1705,7 @@ static void usb_giveback_urb_bh(struct work_struct *w= ork) * @status: completion status code for the URB. * * Context: atomic. The completion callback is invoked in caller's context. - * For HCDs with HCD_BH flag set, the completion callback is invoked in BH + * For HCDs with HCD_BH flag set, the completion callback is invoked in wo= rk * context (except for URBs submitted to the root hub which always complet= e in * caller's context). * @@ -1724,7 +1724,7 @@ void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct= urb *urb, int status) struct giveback_urb_bh *bh; bool running; =20 - /* pass status to BH via unlinked */ + /* pass status to work via unlinked */ if (likely(!urb->unlinked)) urb->unlinked =3D status; =20 @@ -2611,7 +2611,7 @@ EXPORT_SYMBOL_GPL(__usb_create_hcd); * @primary_hcd: a pointer to the usb_hcd structure that is sharing the * PCI device. Only allocate certain resources for the prima= ry HCD * - * Context: task context, might sleep. + * Context: work context, might sleep. * * Allocate a struct usb_hcd, with extra space at the end for the * HC driver's private data. Initialize the generic members of the @@ -2634,7 +2634,7 @@ EXPORT_SYMBOL_GPL(usb_create_shared_hcd); * @dev: device for this HC, stored in hcd->self.controller * @bus_name: value to store in hcd->self.bus_name * - * Context: task context, might sleep. + * Context: work context, might sleep. * * Allocate a struct usb_hcd, with extra space at the end for the * HC driver's private data. Initialize the generic members of the @@ -3001,7 +3001,7 @@ EXPORT_SYMBOL_GPL(usb_add_hcd); * usb_remove_hcd - shutdown processing for generic HCDs * @hcd: the usb_hcd structure to remove * - * Context: task context, might sleep. + * Context: work context, might sleep. * * Disconnects the root hub, then reverses the effects of usb_add_hcd(), * invoking the HCD's stop() method. diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/f= sl_qe_udc.c index 4e88681a79b6..ae29d946a972 100644 --- a/drivers/usb/gadget/udc/fsl_qe_udc.c +++ b/drivers/usb/gadget/udc/fsl_qe_udc.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -930,9 +931,9 @@ static int qe_ep_rxframe_handle(struct qe_ep *ep) return 0; } =20 -static void ep_rx_tasklet(struct tasklet_struct *t) +static void ep_rx_work(struct work_struct *t) { - struct qe_udc *udc =3D from_tasklet(udc, t, rx_tasklet); + struct qe_udc *udc =3D from_work(udc, t, rx_work); struct qe_ep *ep; struct qe_frame *pframe; struct qe_bd __iomem *bd; @@ -945,9 +946,9 @@ static void ep_rx_tasklet(struct tasklet_struct *t) for (i =3D 1; i < USB_MAX_ENDPOINTS; i++) { ep =3D &udc->eps[i]; =20 - if (ep->dir =3D=3D USB_DIR_IN || ep->enable_tasklet =3D=3D 0) { + if (ep->dir =3D=3D USB_DIR_IN || ep->enable_work =3D=3D 0) { dev_dbg(udc->dev, - "This is a transmit ep or disable tasklet!\n"); + "This is a transmit ep or disable work!\n"); continue; } =20 @@ -1012,7 +1013,7 @@ static void ep_rx_tasklet(struct tasklet_struct *t) if (ep->localnack) ep_recycle_rxbds(ep); =20 - ep->enable_tasklet =3D 0; + ep->enable_work =3D 0; } /* for i=3D1 */ =20 spin_unlock_irqrestore(&udc->lock, flags); @@ -1057,8 +1058,8 @@ static int qe_ep_rx(struct qe_ep *ep) return 0; } =20 - tasklet_schedule(&udc->rx_tasklet); - ep->enable_tasklet =3D 1; + queue_work(system_bh_wq, &udc->rx_work); + ep->enable_work =3D 1; =20 return 0; } @@ -2559,7 +2560,7 @@ static int qe_udc_probe(struct platform_device *ofdev) DMA_TO_DEVICE); } =20 - tasklet_setup(&udc->rx_tasklet, ep_rx_tasklet); + INIT_WORK(&udc->rx_work, ep_rx_work); /* request irq and disable DR */ udc->usb_irq =3D irq_of_parse_and_map(np, 0); if (!udc->usb_irq) { @@ -2636,7 +2637,7 @@ static void qe_udc_remove(struct platform_device *ofd= ev) usb_del_gadget_udc(&udc->gadget); =20 udc->done =3D &done; - tasklet_disable(&udc->rx_tasklet); + disable_work_sync(&udc->rx_work); =20 if (udc->nullmap) { dma_unmap_single(udc->gadget.dev.parent, @@ -2671,7 +2672,7 @@ static void qe_udc_remove(struct platform_device *ofd= ev) free_irq(udc->usb_irq, udc); irq_dispose_mapping(udc->usb_irq); =20 - tasklet_kill(&udc->rx_tasklet); + cancel_work_sync(&udc->rx_work); =20 iounmap(udc->usb_regs); =20 diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.h b/drivers/usb/gadget/udc/f= sl_qe_udc.h index 53ca0ff7c2cb..1de87c318460 100644 --- a/drivers/usb/gadget/udc/fsl_qe_udc.h +++ b/drivers/usb/gadget/udc/fsl_qe_udc.h @@ -293,7 +293,7 @@ struct qe_ep { u8 init; =20 u8 already_seen; - u8 enable_tasklet; + u8 enable_work; u8 setup_stage; u32 last_io; /* timestamp */ =20 @@ -353,7 +353,7 @@ struct qe_udc { unsigned int usb_irq; struct usb_ctlr __iomem *usb_regs; =20 - struct tasklet_struct rx_tasklet; + struct work_struct rx_work; =20 struct completion *done; /* to make sure release() is done */ }; diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 7e834587e7de..98823cf9dd0a 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -682,7 +682,7 @@ static void start_unlink_intr(struct ehci_hcd *ehci, st= ruct ehci_qh *qh) =20 /* * It is common only one intr URB is scheduled on one qh, and - * given complete() is run in tasklet context, introduce a bit + * given complete() is run in work context, introduce a bit * delay to avoid unlink qh too early. */ static void start_unlink_intr_wait(struct ehci_hcd *ehci, diff --git a/drivers/usb/host/fhci-hcd.c b/drivers/usb/host/fhci-hcd.c index 9a1b5224f239..5358bb688acb 100644 --- a/drivers/usb/host/fhci-hcd.c +++ b/drivers/usb/host/fhci-hcd.c @@ -211,8 +211,7 @@ static int fhci_mem_init(struct fhci_hcd *fhci) INIT_LIST_HEAD(&fhci->empty_tds); =20 /* initialize work queue to handle done list */ - fhci_tasklet.data =3D (unsigned long)fhci; - fhci->process_done_task =3D &fhci_tasklet; + INIT_WORK(&fhci->process_done_task, process_done_list); =20 for (i =3D 0; i < MAX_TDS; i++) { struct td *td; diff --git a/drivers/usb/host/fhci-sched.c b/drivers/usb/host/fhci-sched.c index a45ede80edfc..9033cce28014 100644 --- a/drivers/usb/host/fhci-sched.c +++ b/drivers/usb/host/fhci-sched.c @@ -628,13 +628,13 @@ irqreturn_t fhci_irq(struct usb_hcd *hcd) * is process_del_list(),which unlinks URBs by scanning EDs,instead of sca= nning * the (re-reversed) done list as this does. */ -static void process_done_list(unsigned long data) +static void process_done_list(struct work_struct *t) { struct urb *urb; struct ed *ed; struct td *td; struct urb_priv *urb_priv; - struct fhci_hcd *fhci =3D (struct fhci_hcd *)data; + struct fhci_hcd *fhci =3D from_work(fhci, t, process_done_task); =20 disable_irq(fhci->timer->irq); disable_irq(fhci_to_hcd(fhci)->irq); @@ -677,13 +677,13 @@ static void process_done_list(unsigned long data) enable_irq(fhci_to_hcd(fhci)->irq); } =20 -DECLARE_TASKLET_OLD(fhci_tasklet, process_done_list); +DECLARE_WORK(fhci_work, process_done_list); =20 /* transfer complted callback */ u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci) { - if (!fhci->process_done_task->state) - tasklet_schedule(fhci->process_done_task); + if (!fhci->process_done_task) + queue_work(system_bh_wq, fhci->process_done_task); return 0; } =20 diff --git a/drivers/usb/host/fhci.h b/drivers/usb/host/fhci.h index 1f57b0989485..7cd613762249 100644 --- a/drivers/usb/host/fhci.h +++ b/drivers/usb/host/fhci.h @@ -24,6 +24,7 @@ #include #include #include +#include #include #include =20 @@ -254,7 +255,7 @@ struct fhci_hcd { struct virtual_root_hub *vroot_hub; /* the virtual root hub */ int active_urbs; struct fhci_controller_list *hc_list; - struct tasklet_struct *process_done_task; /* tasklet for done list */ + struct work_struct *process_done_task; /* work for done list */ =20 struct list_head empty_eds; struct list_head empty_tds; @@ -549,7 +550,7 @@ void fhci_init_ep_registers(struct fhci_usb *usb, void fhci_ep0_free(struct fhci_usb *usb); =20 /* fhci-sched.c */ -extern struct tasklet_struct fhci_tasklet; +extern struct work_struct fhci_work; void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt); void fhci_flush_all_transmissions(struct fhci_usb *usb); void fhci_schedule_transactions(struct fhci_usb *usb); diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h index 92661b555c2a..5660f0cd6d73 100644 --- a/drivers/usb/host/xhci-dbgcap.h +++ b/drivers/usb/host/xhci-dbgcap.h @@ -11,6 +11,7 @@ =20 #include #include +#include =20 struct dbc_regs { __le32 capability; @@ -107,7 +108,7 @@ struct dbc_port { struct list_head read_pool; struct list_head read_queue; unsigned int n_read; - struct tasklet_struct push; + struct work_struct push; =20 struct list_head write_pool; struct kfifo write_fifo; diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c index b74e98e94393..dec2280b4ae9 100644 --- a/drivers/usb/host/xhci-dbgtty.c +++ b/drivers/usb/host/xhci-dbgtty.c @@ -11,6 +11,7 @@ #include #include #include +#include =20 #include "xhci.h" #include "xhci-dbgcap.h" @@ -108,7 +109,7 @@ dbc_read_complete(struct xhci_dbc *dbc, struct dbc_requ= est *req) =20 spin_lock_irqsave(&port->port_lock, flags); list_add_tail(&req->list_pool, &port->read_queue); - tasklet_schedule(&port->push); + queue_work(system_bh_wq, &port->push); spin_unlock_irqrestore(&port->port_lock, flags); } =20 @@ -278,7 +279,7 @@ static void dbc_tty_unthrottle(struct tty_struct *tty) unsigned long flags; =20 spin_lock_irqsave(&port->port_lock, flags); - tasklet_schedule(&port->push); + queue_work(system_bh_wq, &port->push); spin_unlock_irqrestore(&port->port_lock, flags); } =20 @@ -294,14 +295,14 @@ static const struct tty_operations dbc_tty_ops =3D { .unthrottle =3D dbc_tty_unthrottle, }; =20 -static void dbc_rx_push(struct tasklet_struct *t) +static void dbc_rx_push(struct work_struct *t) { struct dbc_request *req; struct tty_struct *tty; unsigned long flags; bool do_push =3D false; bool disconnect =3D false; - struct dbc_port *port =3D from_tasklet(port, t, push); + struct dbc_port *port =3D from_work(port, t, push); struct list_head *queue =3D &port->read_queue; =20 spin_lock_irqsave(&port->port_lock, flags); @@ -355,7 +356,7 @@ static void dbc_rx_push(struct tasklet_struct *t) if (!list_empty(queue) && tty) { if (!tty_throttled(tty)) { if (do_push) - tasklet_schedule(&port->push); + queue_work(system_bh_wq, &port->push); else pr_warn("ttyDBC0: RX not scheduled?\n"); } @@ -388,7 +389,7 @@ xhci_dbc_tty_init_port(struct xhci_dbc *dbc, struct dbc= _port *port) { tty_port_init(&port->port); spin_lock_init(&port->port_lock); - tasklet_setup(&port->push, dbc_rx_push); + INIT_WORK(&port->push, dbc_rx_push); INIT_LIST_HEAD(&port->read_pool); INIT_LIST_HEAD(&port->read_queue); INIT_LIST_HEAD(&port->write_pool); @@ -400,7 +401,7 @@ xhci_dbc_tty_init_port(struct xhci_dbc *dbc, struct dbc= _port *port) static void xhci_dbc_tty_exit_port(struct dbc_port *port) { - tasklet_kill(&port->push); + cancel_work_sync(&port->push); tty_port_destroy(&port->port); } =20 diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h index 2d207cb4837d..8775580852f9 100644 --- a/include/linux/usb/cdc_ncm.h +++ b/include/linux/usb/cdc_ncm.h @@ -96,7 +96,7 @@ struct cdc_ncm_ctx { struct usb_cdc_ncm_ntb_parameters ncm_parm; struct hrtimer tx_timer; - struct tasklet_struct bh; + struct work_struct bh; =20 struct usbnet *dev; =20 diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h index 9f08a584d707..522c533a966b 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; =20 struct work_struct kevent; unsigned long flags; --=20 2.17.1