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/mmc/* from tasklet to BH workqueue. Based on the work done by Tejun Heo <tj@xxxxxxxxxx> Tested-by: Christian Loehle <christian.loehle@xxxxxxx> Tested-by: Aubin Constans <aubin.constans@xxxxxxxxxxxxx> Acked-by: Aubin Constans <aubin.constans@xxxxxxxxxxxxx> Acked-by: Michał Mirosław <mirq-linux@xxxxxxxxxxxx> Reviewed-by: Christian Loehle <christian.loehle@xxxxxxx> Signed-off-by: Allen Pais <allen.lkml@xxxxxxxxx> --- v5: - completely dropped renasas changes from this series. v4: - dropped changes to renasas sdhci(dma_complete) - Wolfram to send a patch for it. v3: - fixed a comment - [Adrian Hunter] v2: - fixed patch styling issues - rename work to bh_work Link to v1: https://lore.kernel.org/all/20240327160314.9982-10-apais@xxxxxxxxxxxxxxxxxxx/ drivers/mmc/host/atmel-mci.c | 35 ++++++++------- drivers/mmc/host/au1xmmc.c | 37 ++++++++-------- drivers/mmc/host/cb710-mmc.c | 14 +++--- drivers/mmc/host/cb710-mmc.h | 3 +- drivers/mmc/host/dw_mmc.c | 24 +++++----- drivers/mmc/host/dw_mmc.h | 9 ++-- drivers/mmc/host/omap.c | 17 +++---- drivers/mmc/host/sdhci-bcm-kona.c | 2 +- drivers/mmc/host/tifm_sd.c | 15 ++++--- drivers/mmc/host/tmio_mmc.h | 3 +- drivers/mmc/host/tmio_mmc_core.c | 4 +- drivers/mmc/host/uniphier-sd.c | 12 ++--- drivers/mmc/host/via-sdmmc.c | 25 ++++++----- drivers/mmc/host/wbsd.c | 74 +++++++++++++++---------------- drivers/mmc/host/wbsd.h | 10 ++--- 15 files changed, 146 insertions(+), 138 deletions(-) diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index 8199d9620075..6490df54a6f5 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -33,6 +33,7 @@ #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/pinctrl/consumer.h> +#include <linux/workqueue.h> #include <asm/cacheflush.h> #include <asm/io.h> @@ -272,12 +273,12 @@ struct atmel_mci_dma { * EVENT_DATA_ERROR is pending. * @stop_cmdr: Value to be loaded into CMDR when the stop command is * to be sent. - * @tasklet: Tasklet running the request state machine. + * @bh_work: Work running the request state machine. * @pending_events: Bitmask of events flagged by the interrupt handler - * to be processed by the tasklet. + * to be processed by the work. * @completed_events: Bitmask of events which the state machine has * processed. - * @state: Tasklet state. + * @state: Work state. * @queue: List of slots waiting for access to the controller. * @need_clock_update: Update the clock rate before the next request. * @need_reset: Reset controller before next request. @@ -352,7 +353,7 @@ struct atmel_mci { u32 data_status; u32 stop_cmdr; - struct tasklet_struct tasklet; + struct work_struct bh_work; unsigned long pending_events; unsigned long completed_events; enum atmel_mci_state state; @@ -735,7 +736,7 @@ static void atmci_timeout_timer(struct timer_list *t) host->need_reset = 1; host->state = STATE_END_REQUEST; smp_wmb(); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host, @@ -958,7 +959,7 @@ static void atmci_pdc_complete(struct atmel_mci *host) dev_dbg(dev, "(%s) set pending xfer complete\n", __func__); atmci_set_pending(host, EVENT_XFER_COMPLETE); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } static void atmci_dma_cleanup(struct atmel_mci *host) @@ -972,7 +973,7 @@ static void atmci_dma_cleanup(struct atmel_mci *host) } /* - * This function is called by the DMA driver from tasklet context. + * This function is called by the DMA driver from bh context. */ static void atmci_dma_complete(void *arg) { @@ -995,7 +996,7 @@ static void atmci_dma_complete(void *arg) if (data) { dev_dbg(dev, "(%s) set pending xfer complete\n", __func__); atmci_set_pending(host, EVENT_XFER_COMPLETE); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); /* * Regardless of what the documentation says, we have @@ -1008,7 +1009,7 @@ static void atmci_dma_complete(void *arg) * haven't seen all the potential error bits yet. * * The interrupt handler will schedule a different - * tasklet to finish things up when the data transfer + * bh work to finish things up when the data transfer * is completely done. * * We may not complete the mmc request here anyway @@ -1745,9 +1746,9 @@ static void atmci_detect_change(struct timer_list *t) } } -static void atmci_tasklet_func(struct tasklet_struct *t) +static void atmci_work_func(struct work_struct *t) { - struct atmel_mci *host = from_tasklet(host, t, tasklet); + struct atmel_mci *host = from_work(host, t, bh_work); struct mmc_request *mrq = host->mrq; struct mmc_data *data = host->data; struct device *dev = host->dev; @@ -1759,7 +1760,7 @@ static void atmci_tasklet_func(struct tasklet_struct *t) state = host->state; - dev_vdbg(dev, "tasklet: state %u pending/completed/mask %lx/%lx/%x\n", + dev_vdbg(dev, "bh_work: state %u pending/completed/mask %lx/%lx/%x\n", state, host->pending_events, host->completed_events, atmci_readl(host, ATMCI_IMR)); @@ -2118,7 +2119,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) dev_dbg(dev, "set pending data error\n"); smp_wmb(); atmci_set_pending(host, EVENT_DATA_ERROR); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & ATMCI_TXBUFE) { @@ -2187,7 +2188,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) smp_wmb(); dev_dbg(dev, "set pending notbusy\n"); atmci_set_pending(host, EVENT_NOTBUSY); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & ATMCI_NOTBUSY) { @@ -2196,7 +2197,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) smp_wmb(); dev_dbg(dev, "set pending notbusy\n"); atmci_set_pending(host, EVENT_NOTBUSY); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & ATMCI_RXRDY) @@ -2211,7 +2212,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) smp_wmb(); dev_dbg(dev, "set pending cmd rdy\n"); atmci_set_pending(host, EVENT_CMD_RDY); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB)) @@ -2487,7 +2488,7 @@ static int atmci_probe(struct platform_device *pdev) host->mapbase = regs->start; - tasklet_setup(&host->tasklet, atmci_tasklet_func); + INIT_WORK(&host->bh_work, atmci_work_func); ret = request_irq(irq, atmci_interrupt, 0, dev_name(dev), host); if (ret) { diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c index b5a5c6a2fe8b..6e80bcb668ec 100644 --- a/drivers/mmc/host/au1xmmc.c +++ b/drivers/mmc/host/au1xmmc.c @@ -42,6 +42,7 @@ #include <linux/leds.h> #include <linux/mmc/host.h> #include <linux/slab.h> +#include <linux/workqueue.h> #include <asm/io.h> #include <asm/mach-au1x00/au1000.h> @@ -113,8 +114,8 @@ struct au1xmmc_host { int irq; - struct tasklet_struct finish_task; - struct tasklet_struct data_task; + struct work_struct finish_bh_work; + struct work_struct data_bh_work; struct au1xmmc_platform_data *platdata; struct platform_device *pdev; struct resource *ioarea; @@ -253,9 +254,9 @@ static void au1xmmc_finish_request(struct au1xmmc_host *host) mmc_request_done(host->mmc, mrq); } -static void au1xmmc_tasklet_finish(struct tasklet_struct *t) +static void au1xmmc_finish_bh_work(struct work_struct *t) { - struct au1xmmc_host *host = from_tasklet(host, t, finish_task); + struct au1xmmc_host *host = from_work(host, t, finish_bh_work); au1xmmc_finish_request(host); } @@ -363,9 +364,9 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) au1xmmc_finish_request(host); } -static void au1xmmc_tasklet_data(struct tasklet_struct *t) +static void au1xmmc_data_bh_work(struct work_struct *t) { - struct au1xmmc_host *host = from_tasklet(host, t, data_task); + struct au1xmmc_host *host = from_work(host, t, data_bh_work); u32 status = __raw_readl(HOST_STATUS(host)); au1xmmc_data_complete(host, status); @@ -425,7 +426,7 @@ static void au1xmmc_send_pio(struct au1xmmc_host *host) if (host->flags & HOST_F_STOP) SEND_STOP(host); - tasklet_schedule(&host->data_task); + queue_work(system_bh_wq, &host->data_bh_work); } } @@ -505,7 +506,7 @@ static void au1xmmc_receive_pio(struct au1xmmc_host *host) if (host->flags & HOST_F_STOP) SEND_STOP(host); - tasklet_schedule(&host->data_task); + queue_work(system_bh_wq, &host->data_bh_work); } } @@ -561,7 +562,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status) if (!trans || cmd->error) { IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); - tasklet_schedule(&host->finish_task); + queue_work(system_bh_wq, &host->finish_bh_work); return; } @@ -797,7 +798,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH); /* IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); */ - tasklet_schedule(&host->finish_task); + queue_work(system_bh_wq, &host->finish_bh_work); } #if 0 else if (status & SD_STATUS_DD) { @@ -806,7 +807,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) au1xmmc_receive_pio(host); else { au1xmmc_data_complete(host, status); - /* tasklet_schedule(&host->data_task); */ + /* queue_work(system_bh_wq, &host->data_bh_work); */ } } #endif @@ -854,7 +855,7 @@ static void au1xmmc_dbdma_callback(int irq, void *dev_id) if (host->flags & HOST_F_STOP) SEND_STOP(host); - tasklet_schedule(&host->data_task); + queue_work(system_bh_wq, &host->data_bh_work); } static int au1xmmc_dbdma_init(struct au1xmmc_host *host) @@ -1039,9 +1040,9 @@ static int au1xmmc_probe(struct platform_device *pdev) if (host->platdata) mmc->caps &= ~(host->platdata->mask_host_caps); - tasklet_setup(&host->data_task, au1xmmc_tasklet_data); + INIT_WORK(&host->data_bh_work, au1xmmc_data_bh_work); - tasklet_setup(&host->finish_task, au1xmmc_tasklet_finish); + INIT_WORK(&host->finish_bh_work, au1xmmc_finish_bh_work); if (has_dbdma()) { ret = au1xmmc_dbdma_init(host); @@ -1091,8 +1092,8 @@ static int au1xmmc_probe(struct platform_device *pdev) if (host->flags & HOST_F_DBDMA) au1xmmc_dbdma_shutdown(host); - tasklet_kill(&host->data_task); - tasklet_kill(&host->finish_task); + cancel_work_sync(&host->data_bh_work); + cancel_work_sync(&host->finish_bh_work); if (host->platdata && host->platdata->cd_setup && !(mmc->caps & MMC_CAP_NEEDS_POLL)) @@ -1135,8 +1136,8 @@ static void au1xmmc_remove(struct platform_device *pdev) __raw_writel(0, HOST_CONFIG2(host)); wmb(); /* drain writebuffer */ - tasklet_kill(&host->data_task); - tasklet_kill(&host->finish_task); + cancel_work_sync(&host->data_bh_work); + cancel_work_sync(&host->finish_bh_work); if (host->flags & HOST_F_DBDMA) au1xmmc_dbdma_shutdown(host); diff --git a/drivers/mmc/host/cb710-mmc.c b/drivers/mmc/host/cb710-mmc.c index 0aec33b88bef..902f7f20abaa 100644 --- a/drivers/mmc/host/cb710-mmc.c +++ b/drivers/mmc/host/cb710-mmc.c @@ -493,7 +493,7 @@ static void cb710_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) if (!cb710_mmc_command(mmc, mrq->cmd) && mrq->stop) cb710_mmc_command(mmc, mrq->stop); - tasklet_schedule(&reader->finish_req_tasklet); + queue_work(system_bh_wq, &reader->finish_req_bh_work); } static int cb710_mmc_powerup(struct cb710_slot *slot) @@ -646,10 +646,10 @@ static int cb710_mmc_irq_handler(struct cb710_slot *slot) return 1; } -static void cb710_mmc_finish_request_tasklet(struct tasklet_struct *t) +static void cb710_mmc_finish_request_bh_work(struct work_struct *t) { - struct cb710_mmc_reader *reader = from_tasklet(reader, t, - finish_req_tasklet); + struct cb710_mmc_reader *reader = from_work(reader, t, + finish_req_bh_work); struct mmc_request *mrq = reader->mrq; reader->mrq = NULL; @@ -718,8 +718,8 @@ static int cb710_mmc_init(struct platform_device *pdev) reader = mmc_priv(mmc); - tasklet_setup(&reader->finish_req_tasklet, - cb710_mmc_finish_request_tasklet); + INIT_WORK(&reader->finish_req_bh_work, + cb710_mmc_finish_request_bh_work); spin_lock_init(&reader->irq_lock); cb710_dump_regs(chip, CB710_DUMP_REGS_MMC); @@ -763,7 +763,7 @@ static void cb710_mmc_exit(struct platform_device *pdev) cb710_write_port_32(slot, CB710_MMC_CONFIG_PORT, 0); cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0); - tasklet_kill(&reader->finish_req_tasklet); + cancel_work_sync(&reader->finish_req_bh_work); mmc_free_host(mmc); } diff --git a/drivers/mmc/host/cb710-mmc.h b/drivers/mmc/host/cb710-mmc.h index 5e053077dbed..59abaccaad10 100644 --- a/drivers/mmc/host/cb710-mmc.h +++ b/drivers/mmc/host/cb710-mmc.h @@ -8,10 +8,11 @@ #define LINUX_CB710_MMC_H #include <linux/cb710.h> +#include <linux/workqueue.h> /* per-MMC-reader structure */ struct cb710_mmc_reader { - struct tasklet_struct finish_req_tasklet; + struct work_struct finish_req_bh_work; struct mmc_request *mrq; spinlock_t irq_lock; unsigned char last_power_mode; diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 8e2d676b9239..7195de2cde44 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -493,7 +493,7 @@ static void dw_mci_dmac_complete_dma(void *arg) */ if (data) { set_bit(EVENT_XFER_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } } @@ -1834,7 +1834,7 @@ static enum hrtimer_restart dw_mci_fault_timer(struct hrtimer *t) if (!host->data_status) { host->data_status = SDMMC_INT_DCRC; set_bit(EVENT_DATA_ERROR, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } spin_unlock_irqrestore(&host->irq_lock, flags); @@ -2056,9 +2056,9 @@ static bool dw_mci_clear_pending_data_complete(struct dw_mci *host) return true; } -static void dw_mci_tasklet_func(struct tasklet_struct *t) +static void dw_mci_work_func(struct work_struct *t) { - struct dw_mci *host = from_tasklet(host, t, tasklet); + struct dw_mci *host = from_work(host, t, bh_work); struct mmc_data *data; struct mmc_command *cmd; struct mmc_request *mrq; @@ -2113,7 +2113,7 @@ static void dw_mci_tasklet_func(struct tasklet_struct *t) * will waste a bit of time (we already know * the command was bad), it can't cause any * errors since it's possible it would have - * taken place anyway if this tasklet got + * taken place anyway if this bh work got * delayed. Allowing the transfer to take place * avoids races and keeps things simple. */ @@ -2706,7 +2706,7 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) smp_wmb(); /* drain writebuffer */ set_bit(EVENT_CMD_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); dw_mci_start_fault_timer(host); } @@ -2774,7 +2774,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) set_bit(EVENT_DATA_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); spin_unlock(&host->irq_lock); } @@ -2793,7 +2793,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) dw_mci_read_data_pio(host, true); } set_bit(EVENT_DATA_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); spin_unlock(&host->irq_lock); } @@ -3098,7 +3098,7 @@ static void dw_mci_cmd11_timer(struct timer_list *t) host->cmd_status = SDMMC_INT_RTO; set_bit(EVENT_CMD_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } static void dw_mci_cto_timer(struct timer_list *t) @@ -3144,7 +3144,7 @@ static void dw_mci_cto_timer(struct timer_list *t) */ host->cmd_status = SDMMC_INT_RTO; set_bit(EVENT_CMD_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); break; default: dev_warn(host->dev, "Unexpected command timeout, state %d\n", @@ -3195,7 +3195,7 @@ static void dw_mci_dto_timer(struct timer_list *t) host->data_status = SDMMC_INT_DRTO; set_bit(EVENT_DATA_ERROR, &host->pending_events); set_bit(EVENT_DATA_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); break; default: dev_warn(host->dev, "Unexpected data timeout, state %d\n", @@ -3435,7 +3435,7 @@ int dw_mci_probe(struct dw_mci *host) else host->fifo_reg = host->regs + DATA_240A_OFFSET; - tasklet_setup(&host->tasklet, dw_mci_tasklet_func); + INIT_WORK(&host->bh_work, dw_mci_work_func); ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, host->irq_flags, "dw-mci", host); if (ret) diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 4ed81f94f7ca..b504f7ae513a 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -17,6 +17,7 @@ #include <linux/fault-inject.h> #include <linux/hrtimer.h> #include <linux/interrupt.h> +#include <linux/workqueue.h> enum dw_mci_state { STATE_IDLE = 0, @@ -89,12 +90,12 @@ struct dw_mci_dma_slave { * @stop_cmdr: Value to be loaded into CMDR when the stop command is * to be sent. * @dir_status: Direction of current transfer. - * @tasklet: Tasklet running the request state machine. + * @bh_work: Work running the request state machine. * @pending_events: Bitmask of events flagged by the interrupt handler - * to be processed by the tasklet. + * to be processed by bh work. * @completed_events: Bitmask of events which the state machine has * processed. - * @state: Tasklet state. + * @state: BH work state. * @queue: List of slots waiting for access to the controller. * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus * rate and timeout calculations. @@ -194,7 +195,7 @@ struct dw_mci { u32 data_status; u32 stop_cmdr; u32 dir_status; - struct tasklet_struct tasklet; + struct work_struct bh_work; unsigned long pending_events; unsigned long completed_events; enum dw_mci_state state; diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index a8ee0df47148..335350a4e99a 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -28,6 +28,7 @@ #include <linux/slab.h> #include <linux/gpio/consumer.h> #include <linux/platform_data/mmc-omap.h> +#include <linux/workqueue.h> #define OMAP_MMC_REG_CMD 0x00 @@ -105,7 +106,7 @@ struct mmc_omap_slot { u16 power_mode; unsigned int fclk_freq; - struct tasklet_struct cover_tasklet; + struct work_struct cover_bh_work; struct timer_list cover_timer; unsigned cover_open; @@ -873,18 +874,18 @@ void omap_mmc_notify_cover_event(struct device *dev, int num, int is_closed) sysfs_notify(&slot->mmc->class_dev.kobj, NULL, "cover_switch"); } - tasklet_hi_schedule(&slot->cover_tasklet); + queue_work(system_bh_highpri_wq, &slot->cover_bh_work); } static void mmc_omap_cover_timer(struct timer_list *t) { struct mmc_omap_slot *slot = from_timer(slot, t, cover_timer); - tasklet_schedule(&slot->cover_tasklet); + queue_work(system_bh_wq, &slot->cover_bh_work); } -static void mmc_omap_cover_handler(struct tasklet_struct *t) +static void mmc_omap_cover_bh_handler(struct work_struct *t) { - struct mmc_omap_slot *slot = from_tasklet(slot, t, cover_tasklet); + struct mmc_omap_slot *slot = from_work(slot, t, cover_bh_work); int cover_open = mmc_omap_cover_is_open(slot); mmc_detect_change(slot->mmc, 0); @@ -1314,7 +1315,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id) if (slot->pdata->get_cover_state != NULL) { timer_setup(&slot->cover_timer, mmc_omap_cover_timer, 0); - tasklet_setup(&slot->cover_tasklet, mmc_omap_cover_handler); + INIT_WORK(&slot->cover_bh_work, mmc_omap_cover_bh_handler); } r = mmc_add_host(mmc); @@ -1333,7 +1334,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id) &dev_attr_cover_switch); if (r < 0) goto err_remove_slot_name; - tasklet_schedule(&slot->cover_tasklet); + queue_work(system_bh_wq, &slot->cover_bh_work); } return 0; @@ -1356,7 +1357,7 @@ static void mmc_omap_remove_slot(struct mmc_omap_slot *slot) if (slot->pdata->get_cover_state != NULL) device_remove_file(&mmc->class_dev, &dev_attr_cover_switch); - tasklet_kill(&slot->cover_tasklet); + cancel_work_sync(&slot->cover_bh_work); del_timer_sync(&slot->cover_timer); flush_workqueue(slot->host->mmc_omap_wq); diff --git a/drivers/mmc/host/sdhci-bcm-kona.c b/drivers/mmc/host/sdhci-bcm-kona.c index cb9152c6a65d..e067c7f5c537 100644 --- a/drivers/mmc/host/sdhci-bcm-kona.c +++ b/drivers/mmc/host/sdhci-bcm-kona.c @@ -107,7 +107,7 @@ static void sdhci_bcm_kona_sd_init(struct sdhci_host *host) * Software emulation of the SD card insertion/removal. Set insert=1 for insert * and insert=0 for removal. The card detection is done by GPIO. For Broadcom * IP to function properly the bit 0 of CORESTAT register needs to be set/reset - * to generate the CD IRQ handled in sdhci.c which schedules card_tasklet. +* to generate the CD IRQ handled in sdhci.c */ static int sdhci_bcm_kona_sd_card_emulate(struct sdhci_host *host, int insert) { diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c index b5a2f2f25ad9..aea14bf3e2e8 100644 --- a/drivers/mmc/host/tifm_sd.c +++ b/drivers/mmc/host/tifm_sd.c @@ -13,6 +13,7 @@ #include <linux/highmem.h> #include <linux/scatterlist.h> #include <linux/module.h> +#include <linux/workqueue.h> #include <asm/io.h> #define DRIVER_NAME "tifm_sd" @@ -97,7 +98,7 @@ struct tifm_sd { unsigned int clk_div; unsigned long timeout_jiffies; - struct tasklet_struct finish_tasklet; + struct work_struct finish_bh_work; struct timer_list timer; struct mmc_request *req; @@ -463,7 +464,7 @@ static void tifm_sd_check_status(struct tifm_sd *host) } } finish_request: - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } /* Called from interrupt handler */ @@ -723,9 +724,9 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) mmc_request_done(mmc, mrq); } -static void tifm_sd_end_cmd(struct tasklet_struct *t) +static void tifm_sd_end_cmd(struct work_struct *t) { - struct tifm_sd *host = from_tasklet(host, t, finish_tasklet); + struct tifm_sd *host = from_work(host, t, finish_bh_work); struct tifm_dev *sock = host->dev; struct mmc_host *mmc = tifm_get_drvdata(sock); struct mmc_request *mrq; @@ -960,7 +961,7 @@ static int tifm_sd_probe(struct tifm_dev *sock) */ mmc->max_busy_timeout = TIFM_MMCSD_REQ_TIMEOUT_MS; - tasklet_setup(&host->finish_tasklet, tifm_sd_end_cmd); + INIT_WORK(&host->finish_bh_work, tifm_sd_end_cmd); timer_setup(&host->timer, tifm_sd_abort, 0); mmc->ops = &tifm_sd_ops; @@ -999,7 +1000,7 @@ static void tifm_sd_remove(struct tifm_dev *sock) writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); spin_unlock_irqrestore(&sock->lock, flags); - tasklet_kill(&host->finish_tasklet); + cancel_work_sync(&host->finish_bh_work); spin_lock_irqsave(&sock->lock, flags); if (host->req) { @@ -1009,7 +1010,7 @@ static void tifm_sd_remove(struct tifm_dev *sock) host->req->cmd->error = -ENOMEDIUM; if (host->req->stop) host->req->stop->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } spin_unlock_irqrestore(&sock->lock, flags); mmc_remove_host(mmc); diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index de56e6534aea..63000d9c7030 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -21,6 +21,7 @@ #include <linux/scatterlist.h> #include <linux/spinlock.h> #include <linux/interrupt.h> +#include <linux/workqueue.h> #define CTL_SD_CMD 0x00 #define CTL_ARG_REG 0x04 @@ -156,7 +157,7 @@ struct tmio_mmc_host { bool dma_on; struct dma_chan *chan_rx; struct dma_chan *chan_tx; - struct tasklet_struct dma_issue; + struct work_struct dma_issue; struct scatterlist bounce_sg; u8 *bounce_buf; diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 93e912afd3ae..51bd2365795b 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) } else { tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP); - tasklet_schedule(&host->dma_issue); + queue_work(system_bh_wq, &host->dma_issue); } } else { if (!host->dma_on) { @@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) } else { tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_WRITEOP); - tasklet_schedule(&host->dma_issue); + queue_work(system_bh_wq, &host->dma_issue); } } } else { diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c index 1404989e6151..417fd13efdfd 100644 --- a/drivers/mmc/host/uniphier-sd.c +++ b/drivers/mmc/host/uniphier-sd.c @@ -90,9 +90,9 @@ static void uniphier_sd_dma_endisable(struct tmio_mmc_host *host, int enable) } /* external DMA engine */ -static void uniphier_sd_external_dma_issue(struct tasklet_struct *t) +static void uniphier_sd_external_dma_issue(struct work_struct *t) { - struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue); + struct tmio_mmc_host *host = from_work(host, t, dma_issue); struct uniphier_sd_priv *priv = uniphier_sd_priv(host); uniphier_sd_dma_endisable(host, 1); @@ -199,7 +199,7 @@ static void uniphier_sd_external_dma_request(struct tmio_mmc_host *host, host->chan_rx = chan; host->chan_tx = chan; - tasklet_setup(&host->dma_issue, uniphier_sd_external_dma_issue); + INIT_WORK(&host->dma_issue, uniphier_sd_external_dma_issue); } static void uniphier_sd_external_dma_release(struct tmio_mmc_host *host) @@ -236,9 +236,9 @@ static const struct tmio_mmc_dma_ops uniphier_sd_external_dma_ops = { .dataend = uniphier_sd_external_dma_dataend, }; -static void uniphier_sd_internal_dma_issue(struct tasklet_struct *t) +static void uniphier_sd_internal_dma_issue(struct work_struct *t) { - struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue); + struct tmio_mmc_host *host = from_work(host, t, dma_issue); unsigned long flags; spin_lock_irqsave(&host->lock, flags); @@ -317,7 +317,7 @@ static void uniphier_sd_internal_dma_request(struct tmio_mmc_host *host, host->chan_tx = (void *)0xdeadbeaf; - tasklet_setup(&host->dma_issue, uniphier_sd_internal_dma_issue); + INIT_WORK(&host->dma_issue, uniphier_sd_internal_dma_issue); } static void uniphier_sd_internal_dma_release(struct tmio_mmc_host *host) diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c index ba6044b16e07..f77457105ec3 100644 --- a/drivers/mmc/host/via-sdmmc.c +++ b/drivers/mmc/host/via-sdmmc.c @@ -12,6 +12,7 @@ #include <linux/interrupt.h> #include <linux/mmc/host.h> +#include <linux/workqueue.h> #define DRV_NAME "via_sdmmc" @@ -307,7 +308,7 @@ struct via_crdr_mmc_host { struct sdhcreg pm_sdhc_reg; struct work_struct carddet_work; - struct tasklet_struct finish_tasklet; + struct work_struct finish_bh_work; struct timer_list timer; spinlock_t lock; @@ -643,7 +644,7 @@ static void via_sdc_finish_data(struct via_crdr_mmc_host *host) if (data->stop) via_sdc_send_command(host, data->stop); else - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } static void via_sdc_finish_command(struct via_crdr_mmc_host *host) @@ -653,7 +654,7 @@ static void via_sdc_finish_command(struct via_crdr_mmc_host *host) host->cmd->error = 0; if (!host->cmd->data) - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); host->cmd = NULL; } @@ -682,7 +683,7 @@ static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq) status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) { host->mrq->cmd->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } else { via_sdc_send_command(host, mrq->cmd); } @@ -848,7 +849,7 @@ static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask) host->cmd->error = -EILSEQ; if (host->cmd->error) - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); else if (intmask & VIA_CRDR_SDSTS_CRD) via_sdc_finish_command(host); } @@ -955,16 +956,16 @@ static void via_sdc_timeout(struct timer_list *t) sdhost->cmd->error = -ETIMEDOUT; else sdhost->mrq->cmd->error = -ETIMEDOUT; - tasklet_schedule(&sdhost->finish_tasklet); + queue_work(system_bh_wq, &sdhost->finish_bh_work); } } spin_unlock_irqrestore(&sdhost->lock, flags); } -static void via_sdc_tasklet_finish(struct tasklet_struct *t) +static void via_sdc_finish_bh_work(struct work_struct *t) { - struct via_crdr_mmc_host *host = from_tasklet(host, t, finish_tasklet); + struct via_crdr_mmc_host *host = from_work(host, t, finish_bh_work); unsigned long flags; struct mmc_request *mrq; @@ -1005,7 +1006,7 @@ static void via_sdc_card_detect(struct work_struct *work) pr_err("%s: Card removed during transfer!\n", mmc_hostname(host->mmc)); host->mrq->cmd->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } spin_unlock_irqrestore(&host->lock, flags); @@ -1051,7 +1052,7 @@ static void via_init_mmc_host(struct via_crdr_mmc_host *host) INIT_WORK(&host->carddet_work, via_sdc_card_detect); - tasklet_setup(&host->finish_tasklet, via_sdc_tasklet_finish); + INIT_WORK(&host->finish_bh_work, via_sdc_finish_bh_work); addrbase = host->sdhc_mmiobase; writel(0x0, addrbase + VIA_CRDR_SDINTMASK); @@ -1193,7 +1194,7 @@ static void via_sd_remove(struct pci_dev *pcidev) sdhost->mrq->cmd->error = -ENOMEDIUM; if (sdhost->mrq->stop) sdhost->mrq->stop->error = -ENOMEDIUM; - tasklet_schedule(&sdhost->finish_tasklet); + queue_work(system_bh_wq, &sdhost->finish_bh_work); } spin_unlock_irqrestore(&sdhost->lock, flags); @@ -1203,7 +1204,7 @@ static void via_sd_remove(struct pci_dev *pcidev) del_timer_sync(&sdhost->timer); - tasklet_kill(&sdhost->finish_tasklet); + cancel_work_sync(&sdhost->finish_bh_work); /* switch off power */ gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c index f0562f712d98..6e20405d0430 100644 --- a/drivers/mmc/host/wbsd.c +++ b/drivers/mmc/host/wbsd.c @@ -459,7 +459,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host) * FIFO threshold interrupts properly. */ if ((data->blocks * data->blksz - data->bytes_xfered) < 16) - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); } static void wbsd_fill_fifo(struct wbsd_host *host) @@ -524,7 +524,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host) * 'FIFO empty' under certain conditions. So we * need to be a bit more pro-active. */ - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); } static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) @@ -746,7 +746,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) struct mmc_command *cmd; /* - * Disable tasklets to avoid a deadlock. + * Disable bh works to avoid a deadlock. */ spin_lock_bh(&host->lock); @@ -821,7 +821,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) * Dirty fix for hardware bug. */ if (host->dma == -1) - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); spin_unlock_bh(&host->lock); @@ -961,13 +961,13 @@ static void wbsd_reset_ignore(struct timer_list *t) * Card status might have changed during the * blackout. */ - tasklet_schedule(&host->card_tasklet); + queue_work(system_bh_wq, &host->card_bh_work); spin_unlock_bh(&host->lock); } /* - * Tasklets + * BH Works */ static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) @@ -987,9 +987,9 @@ static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) return host->mrq->cmd->data; } -static void wbsd_tasklet_card(struct tasklet_struct *t) +static void wbsd_card_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, card_tasklet); + struct wbsd_host *host = from_work(host, t, card_bh_work); u8 csr; int delay = -1; @@ -1020,7 +1020,7 @@ static void wbsd_tasklet_card(struct tasklet_struct *t) wbsd_reset(host); host->mrq->cmd->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } delay = 0; @@ -1036,9 +1036,9 @@ static void wbsd_tasklet_card(struct tasklet_struct *t) mmc_detect_change(host->mmc, msecs_to_jiffies(delay)); } -static void wbsd_tasklet_fifo(struct tasklet_struct *t) +static void wbsd_fifo_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, fifo_tasklet); + struct wbsd_host *host = from_work(host, t, fifo_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1060,16 +1060,16 @@ static void wbsd_tasklet_fifo(struct tasklet_struct *t) */ if (host->num_sg == 0) { wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } end: spin_unlock(&host->lock); } -static void wbsd_tasklet_crc(struct tasklet_struct *t) +static void wbsd_crc_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, crc_tasklet); + struct wbsd_host *host = from_work(host, t, crc_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1085,15 +1085,15 @@ static void wbsd_tasklet_crc(struct tasklet_struct *t) data->error = -EILSEQ; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); end: spin_unlock(&host->lock); } -static void wbsd_tasklet_timeout(struct tasklet_struct *t) +static void wbsd_timeout_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, timeout_tasklet); + struct wbsd_host *host = from_work(host, t, timeout_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1109,15 +1109,15 @@ static void wbsd_tasklet_timeout(struct tasklet_struct *t) data->error = -ETIMEDOUT; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); end: spin_unlock(&host->lock); } -static void wbsd_tasklet_finish(struct tasklet_struct *t) +static void wbsd_finish_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, finish_tasklet); + struct wbsd_host *host = from_work(host, t, finish_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1156,18 +1156,18 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id) host->isr |= isr; /* - * Schedule tasklets as needed. + * Schedule bh work as needed. */ if (isr & WBSD_INT_CARD) - tasklet_schedule(&host->card_tasklet); + queue_work(system_bh_wq, &host->card_bh_work); if (isr & WBSD_INT_FIFO_THRE) - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); if (isr & WBSD_INT_CRC) - tasklet_hi_schedule(&host->crc_tasklet); + queue_work(system_bh_highpri_wq, &host->crc_bh_work); if (isr & WBSD_INT_TIMEOUT) - tasklet_hi_schedule(&host->timeout_tasklet); + queue_work(system_bh_highpri_wq, &host->timeout_bh_work); if (isr & WBSD_INT_TC) - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); return IRQ_HANDLED; } @@ -1443,13 +1443,13 @@ static int wbsd_request_irq(struct wbsd_host *host, int irq) int ret; /* - * Set up tasklets. Must be done before requesting interrupt. + * Set up bh works. Must be done before requesting interrupt. */ - tasklet_setup(&host->card_tasklet, wbsd_tasklet_card); - tasklet_setup(&host->fifo_tasklet, wbsd_tasklet_fifo); - tasklet_setup(&host->crc_tasklet, wbsd_tasklet_crc); - tasklet_setup(&host->timeout_tasklet, wbsd_tasklet_timeout); - tasklet_setup(&host->finish_tasklet, wbsd_tasklet_finish); + INIT_WORK(&host->card_bh_work, wbsd_card_bh_work); + INIT_WORK(&host->fifo_bh_work, wbsd_fifo_bh_work); + INIT_WORK(&host->crc_bh_work, wbsd_crc_bh_work); + INIT_WORK(&host->timeout_bh_work, wbsd_timeout_bh_work); + INIT_WORK(&host->finish_bh_work, wbsd_finish_bh_work); /* * Allocate interrupt. @@ -1472,11 +1472,11 @@ static void wbsd_release_irq(struct wbsd_host *host) host->irq = 0; - tasklet_kill(&host->card_tasklet); - tasklet_kill(&host->fifo_tasklet); - tasklet_kill(&host->crc_tasklet); - tasklet_kill(&host->timeout_tasklet); - tasklet_kill(&host->finish_tasklet); + cancel_work_sync(&host->card_bh_work); + cancel_work_sync(&host->fifo_bh_work); + cancel_work_sync(&host->crc_bh_work); + cancel_work_sync(&host->timeout_bh_work); + cancel_work_sync(&host->finish_bh_work); } /* diff --git a/drivers/mmc/host/wbsd.h b/drivers/mmc/host/wbsd.h index be30b4d8ce4c..970886831305 100644 --- a/drivers/mmc/host/wbsd.h +++ b/drivers/mmc/host/wbsd.h @@ -171,11 +171,11 @@ struct wbsd_host int irq; /* Interrupt */ int dma; /* DMA channel */ - struct tasklet_struct card_tasklet; /* Tasklet structures */ - struct tasklet_struct fifo_tasklet; - struct tasklet_struct crc_tasklet; - struct tasklet_struct timeout_tasklet; - struct tasklet_struct finish_tasklet; + struct work_struct card_bh_work; /* Work structures */ + struct work_struct fifo_bh_work; + struct work_struct crc_bh_work; + struct work_struct timeout_bh_work; + struct work_struct finish_bh_work; struct timer_list ignore_timer; /* Ignore detection timer */ }; -- 2.34.1
