diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-04 21:35:12 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-04 21:35:12 -0800 |
commit | fd0d351de7bbd718bc2b34d5846854831aa2b88c (patch) | |
tree | b4630c372215deb2e17235707189f06603bee3a3 /drivers | |
parent | 3d6f47801c34e42da26e2b6b29706f0bfe423978 (diff) | |
parent | e052c6d15c61cc4caff2f06cbca72b183da9f15e (diff) |
Merge tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver updates from Greg KH:
"Here is the big tty and serial driver update for 4.4-rc1.
Lots of serial driver updates and a few small tty core changes. Full
details in the shortlog.
All of these have been in linux-next for a while"
* tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (148 commits)
tty: Use unbound workqueue for all input workers
tty: Abstract tty buffer work
tty: Prevent tty teardown during tty_write_message()
tty: core: Use correct spinlock flavor in tiocspgrp()
tty: Combine SIGTTOU/SIGTTIN handling
serial: amba-pl011: fix incorrect integer size in pl011_fifo_to_tty()
ttyFDC: Fix build problems due to use of module_{init,exit}
tty: remove unneeded return statement
serial: 8250_mid: add support for DMA engine handling from UART MMIO
dmaengine: hsu: remove platform data
dmaengine: hsu: introduce stubs for the exported functions
dmaengine: hsu: make the UART driver in control of selecting this driver
serial: fix mctrl helper functions
serial: 8250_pci: Intel MID UART support to its own driver
serial: fsl_lpuart: add earlycon support
tty: disable unbind for old 74xx based serial/mpsc console port
serial: pl011: Spelling s/clocks-names/clock-names/
n_tty: Remove reader wakeups for TTY_BREAK/TTY_PARITY chars
tty: synclink, fix indentation
serial: at91, fix rs485 properties
...
Diffstat (limited to 'drivers')
67 files changed, 2459 insertions, 1692 deletions
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 7680d5213ff8..45df4bf914f8 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2507,15 +2507,6 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp) printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", __FILE__, __LINE__, tty->driver->name, port->count); - /* If port is closing, signal caller to try again */ - if (port->flags & ASYNC_CLOSING){ - wait_event_interruptible_tty(tty, port->close_wait, - !(port->flags & ASYNC_CLOSING)); - retval = ((port->flags & ASYNC_HUP_NOTIFY) ? - -EAGAIN : -ERESTARTSYS); - goto cleanup; - } - port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; spin_lock_irqsave(&info->netlock, flags); diff --git a/drivers/dma/hsu/Kconfig b/drivers/dma/hsu/Kconfig index 2810dca70612..c70841731a80 100644 --- a/drivers/dma/hsu/Kconfig +++ b/drivers/dma/hsu/Kconfig @@ -5,10 +5,5 @@ config HSU_DMA select DMA_VIRTUAL_CHANNELS config HSU_DMA_PCI - tristate "High Speed UART DMA PCI driver" - depends on PCI - select HSU_DMA - help - Support the High Speed UART DMA on the platfroms that - enumerate it as a PCI device. For example, Intel Medfield - has integrated this HSU DMA controller. + tristate + depends on HSU_DMA && PCI diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c index 7669c7dd1e34..823ad728aecf 100644 --- a/drivers/dma/hsu/hsu.c +++ b/drivers/dma/hsu/hsu.c @@ -146,7 +146,7 @@ irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr) u32 sr; /* Sanity check */ - if (nr >= chip->pdata->nr_channels) + if (nr >= chip->hsu->nr_channels) return IRQ_NONE; hsuc = &chip->hsu->chan[nr]; @@ -375,7 +375,6 @@ static void hsu_dma_free_chan_resources(struct dma_chan *chan) int hsu_dma_probe(struct hsu_dma_chip *chip) { struct hsu_dma *hsu; - struct hsu_dma_platform_data *pdata = chip->pdata; void __iomem *addr = chip->regs + chip->offset; unsigned short i; int ret; @@ -386,25 +385,16 @@ int hsu_dma_probe(struct hsu_dma_chip *chip) chip->hsu = hsu; - if (!pdata) { - pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return -ENOMEM; + /* Calculate nr_channels from the IO space length */ + hsu->nr_channels = (chip->length - chip->offset) / HSU_DMA_CHAN_LENGTH; - chip->pdata = pdata; - - /* Guess nr_channels from the IO space length */ - pdata->nr_channels = (chip->length - chip->offset) / - HSU_DMA_CHAN_LENGTH; - } - - hsu->chan = devm_kcalloc(chip->dev, pdata->nr_channels, + hsu->chan = devm_kcalloc(chip->dev, hsu->nr_channels, sizeof(*hsu->chan), GFP_KERNEL); if (!hsu->chan) return -ENOMEM; INIT_LIST_HEAD(&hsu->dma.channels); - for (i = 0; i < pdata->nr_channels; i++) { + for (i = 0; i < hsu->nr_channels; i++) { struct hsu_dma_chan *hsuc = &hsu->chan[i]; hsuc->vchan.desc_free = hsu_dma_desc_free; @@ -440,7 +430,7 @@ int hsu_dma_probe(struct hsu_dma_chip *chip) if (ret) return ret; - dev_info(chip->dev, "Found HSU DMA, %d channels\n", pdata->nr_channels); + dev_info(chip->dev, "Found HSU DMA, %d channels\n", hsu->nr_channels); return 0; } EXPORT_SYMBOL_GPL(hsu_dma_probe); @@ -452,7 +442,7 @@ int hsu_dma_remove(struct hsu_dma_chip *chip) dma_async_device_unregister(&hsu->dma); - for (i = 0; i < chip->pdata->nr_channels; i++) { + for (i = 0; i < hsu->nr_channels; i++) { struct hsu_dma_chan *hsuc = &hsu->chan[i]; tasklet_kill(&hsuc->vchan.task); diff --git a/drivers/dma/hsu/hsu.h b/drivers/dma/hsu/hsu.h index eeb9fff66967..f06579c6d548 100644 --- a/drivers/dma/hsu/hsu.h +++ b/drivers/dma/hsu/hsu.h @@ -107,6 +107,7 @@ struct hsu_dma { /* channels */ struct hsu_dma_chan *chan; + unsigned short nr_channels; }; static inline struct hsu_dma *to_hsu_dma(struct dma_device *ddev) diff --git a/drivers/dma/hsu/pci.c b/drivers/dma/hsu/pci.c index 77879e6ddc4c..e2db76bd56d8 100644 --- a/drivers/dma/hsu/pci.c +++ b/drivers/dma/hsu/pci.c @@ -31,7 +31,7 @@ static irqreturn_t hsu_pci_irq(int irq, void *dev) irqreturn_t ret = IRQ_NONE; dmaisr = readl(chip->regs + HSU_PCI_DMAISR); - for (i = 0; i < chip->pdata->nr_channels; i++) { + for (i = 0; i < chip->hsu->nr_channels; i++) { if (dmaisr & 0x1) ret |= hsu_dma_irq(chip, i); dmaisr >>= 1; diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index bc912611fe09..2175225af742 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -1582,7 +1582,7 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp) * line status register. */ if (port->flags & ASYNC_INITIALIZED) { - tty_wait_until_sent_from_close(tty, 3000); /* 30 seconds timeout */ + tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ /* * Before we drop DTR, make sure the UART transmitter * has completely drained; this is especially diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index 87f6578c6f4a..d4a1331675ed 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -1577,15 +1577,6 @@ static int cy_open(struct tty_struct *tty, struct file *filp) #endif /* - * If the port is the middle of closing, bail out now - */ - if (info->port.flags & ASYNC_CLOSING) { - wait_event_interruptible_tty(tty, info->port.close_wait, - !(info->port.flags & ASYNC_CLOSING)); - return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; - } - - /* * Start up serial port */ retval = cy_startup(info, tty); diff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig index 2509d057b99c..574da15fe618 100644 --- a/drivers/tty/hvc/Kconfig +++ b/drivers/tty/hvc/Kconfig @@ -81,7 +81,7 @@ config HVC_UDBG config HVC_DCC bool "ARM JTAG DCC console" - depends on ARM + depends on ARM || ARM64 select HVC_DRIVER help This console uses the JTAG DCC on ARM to create a console under the HVC diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 4e9c4cc9e1b5..e46d628998f5 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -29,7 +29,7 @@ #include <linux/kernel.h> #include <linux/kthread.h> #include <linux/list.h> -#include <linux/module.h> +#include <linux/init.h> #include <linux/major.h> #include <linux/atomic.h> #include <linux/sysrq.h> @@ -418,7 +418,7 @@ static void hvc_close(struct tty_struct *tty, struct file * filp) * there is no buffered data otherwise sleeps on a wait queue * waking periodically to check chars_in_buffer(). */ - tty_wait_until_sent_from_close(tty, HVC_CLOSE_WAIT); + tty_wait_until_sent(tty, HVC_CLOSE_WAIT); } else { if (hp->port.count < 0) printk(KERN_ERR "hvc_close %X: oops, count is %d\n", @@ -1005,19 +1005,3 @@ put_tty: out: return err; } - -/* This isn't particularly necessary due to this being a console driver - * but it is nice to be thorough. - */ -static void __exit hvc_exit(void) -{ - if (hvc_driver) { - kthread_stop(hvc_task); - - tty_unregister_driver(hvc_driver); - /* return tty_struct instances allocated in hvc_init(). */ - put_tty_driver(hvc_driver); - unregister_console(&hvc_console); - } -} -module_exit(hvc_exit); diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c index 809920d80a66..82f240fb98f0 100644 --- a/drivers/tty/hvc/hvc_dcc.c +++ b/drivers/tty/hvc/hvc_dcc.c @@ -70,20 +70,27 @@ static const struct hv_ops hvc_dcc_get_put_ops = { static int __init hvc_dcc_console_init(void) { + int ret; + if (!hvc_dcc_check()) return -ENODEV; - hvc_instantiate(0, 0, &hvc_dcc_get_put_ops); - return 0; + /* Returns -1 if error */ + ret = hvc_instantiate(0, 0, &hvc_dcc_get_put_ops); + + return ret < 0 ? -ENODEV : 0; } console_initcall(hvc_dcc_console_init); static int __init hvc_dcc_init(void) { + struct hvc_struct *p; + if (!hvc_dcc_check()) return -ENODEV; - hvc_alloc(0, 0, &hvc_dcc_get_put_ops, 128); - return 0; + p = hvc_alloc(0, 0, &hvc_dcc_get_put_ops, 128); + + return PTR_ERR_OR_ZERO(p); } device_initcall(hvc_dcc_init); diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index f7ff97c0ad34..5997b1731111 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -1230,7 +1230,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) irq = hvcsd->vdev->irq; spin_unlock_irqrestore(&hvcsd->lock, flags); - tty_wait_until_sent_from_close(tty, HVCS_CLOSE_WAIT); + tty_wait_until_sent(tty, HVCS_CLOSE_WAIT); /* * This line is important because it tells hvcs_open that this diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c index a8c8cfd52a23..a119176a1855 100644 --- a/drivers/tty/mips_ejtag_fdc.c +++ b/drivers/tty/mips_ejtag_fdc.c @@ -977,7 +977,7 @@ static int mips_ejtag_fdc_tty_probe(struct mips_cdmm_device *dev) /* Try requesting the IRQ */ if (priv->irq >= 0) { /* - * IRQF_SHARED, IRQF_NO_SUSPEND: The FDC IRQ may be shared with + * IRQF_SHARED, IRQF_COND_SUSPEND: The FDC IRQ may be shared with * other local interrupts such as the timer which sets * IRQF_TIMER (including IRQF_NO_SUSPEND). * @@ -987,7 +987,7 @@ static int mips_ejtag_fdc_tty_probe(struct mips_cdmm_device *dev) */ ret = devm_request_irq(priv->dev, priv->irq, mips_ejtag_fdc_isr, IRQF_PERCPU | IRQF_SHARED | - IRQF_NO_THREAD | IRQF_NO_SUSPEND, + IRQF_NO_THREAD | IRQF_COND_SUSPEND, priv->fdc_name, priv); if (ret) priv->irq = -1; @@ -1048,38 +1048,6 @@ err_destroy_ports: return ret; } -static int mips_ejtag_fdc_tty_remove(struct mips_cdmm_device *dev) -{ - struct mips_ejtag_fdc_tty *priv = mips_cdmm_get_drvdata(dev); - struct mips_ejtag_fdc_tty_port *dport; - int nport; - unsigned int cfg; - - if (priv->irq >= 0) { - raw_spin_lock_irq(&priv->lock); - cfg = mips_ejtag_fdc_read(priv, REG_FDCFG); - /* Disable interrupts */ - cfg &= ~(REG_FDCFG_TXINTTHRES | REG_FDCFG_RXINTTHRES); - cfg |= REG_FDCFG_TXINTTHRES_DISABLED; - cfg |= REG_FDCFG_RXINTTHRES_DISABLED; - mips_ejtag_fdc_write(priv, REG_FDCFG, cfg); - raw_spin_unlock_irq(&priv->lock); - } else { - priv->removing = true; - del_timer_sync(&priv->poll_timer); - } - kthread_stop(priv->thread); - if (dev->cpu == 0) - mips_ejtag_fdc_con.tty_drv = NULL; - tty_unregister_driver(priv->driver); - for (nport = 0; nport < NUM_TTY_CHANNELS; nport++) { - dport = &priv->ports[nport]; - tty_port_destroy(&dport->port); - } - put_tty_driver(priv->driver); - return 0; -} - static int mips_ejtag_fdc_tty_cpu_down(struct mips_cdmm_device *dev) { struct mips_ejtag_fdc_tty *priv = mips_cdmm_get_drvdata(dev); @@ -1152,12 +1120,11 @@ static struct mips_cdmm_driver mips_ejtag_fdc_tty_driver = { .name = "mips_ejtag_fdc", }, .probe = mips_ejtag_fdc_tty_probe, - .remove = mips_ejtag_fdc_tty_remove, .cpu_down = mips_ejtag_fdc_tty_cpu_down, .cpu_up = mips_ejtag_fdc_tty_cpu_up, .id_table = mips_ejtag_fdc_tty_ids, }; -module_mips_cdmm_driver(mips_ejtag_fdc_tty_driver); +builtin_mips_cdmm_driver(mips_ejtag_fdc_tty_driver); static int __init mips_ejtag_fdc_init_console(void) { diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 8b157d68a03e..345111467b85 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -276,7 +276,7 @@ static void remove_from_tx_queue(struct r3964_info *pInfo, int error_code) add_msg(pHeader->owner, R3964_MSG_ACK, pHeader->length, error_code, NULL); } - wake_up_interruptible(&pInfo->read_wait); + wake_up_interruptible(&pInfo->tty->read_wait); } spin_lock_irqsave(&pInfo->lock, flags); @@ -542,7 +542,7 @@ static void on_receive_block(struct r3964_info *pInfo) pBlock); } } - wake_up_interruptible(&pInfo->read_wait); + wake_up_interruptible(&pInfo->tty->read_wait); pInfo->state = R3964_IDLE; @@ -978,8 +978,8 @@ static int r3964_open(struct tty_struct *tty) } spin_lock_init(&pInfo->lock); + mutex_init(&pInfo->read_lock); pInfo->tty = tty; - init_waitqueue_head(&pInfo->read_wait); pInfo->priority = R3964_MASTER; pInfo->rx_first = pInfo->rx_last = NULL; pInfo->tx_first = pInfo->tx_last = NULL; @@ -1045,7 +1045,6 @@ static void r3964_close(struct tty_struct *tty) } /* Free buffers: */ - wake_up_interruptible(&pInfo->read_wait); kfree(pInfo->rx_buf); TRACE_M("r3964_close - rx_buf kfree %p", pInfo->rx_buf); kfree(pInfo->tx_buf); @@ -1065,7 +1064,16 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, TRACE_L("read()"); - tty_lock(tty); + /* + * Internal serialization of reads. + */ + if (file->f_flags & O_NONBLOCK) { + if (!mutex_trylock(&pInfo->read_lock)) + return -EAGAIN; + } else { + if (mutex_lock_interruptible(&pInfo->read_lock)) + return -ERESTARTSYS; + } pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1077,7 +1085,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, goto unlock; } /* block until there is a message: */ - wait_event_interruptible_tty(tty, pInfo->read_wait, + wait_event_interruptible(tty->read_wait, (pMsg = remove_msg(pInfo, pClient))); } @@ -1107,7 +1115,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, } ret = -EPERM; unlock: - tty_unlock(tty); + mutex_unlock(&pInfo->read_lock); return ret; } @@ -1156,8 +1164,6 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, pHeader->locks = 0; pHeader->owner = NULL; - tty_lock(tty); - pClient = findClient(pInfo, task_pid(current)); if (pClient) { pHeader->owner = pClient; @@ -1175,8 +1181,6 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, add_tx_queue(pInfo, pHeader); trigger_transmit(pInfo); - tty_unlock(tty); - return 0; } @@ -1227,7 +1231,7 @@ static unsigned int r3964_poll(struct tty_struct *tty, struct file *file, pClient = findClient(pInfo, task_pid(current)); if (pClient) { - poll_wait(file, &pInfo->read_wait, wait); + poll_wait(file, &tty->read_wait, wait); spin_lock_irqsave(&pInfo->lock, flags); pMsg = pClient->first_msg; spin_unlock_irqrestore(&pInfo->lock, flags); diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index b09023b07169..13844261cd5f 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -201,7 +201,7 @@ static void n_tty_kick_worker(struct tty_struct *tty) */ WARN_RATELIMIT(test_bit(TTY_LDISC_HALTED, &tty->flags), "scheduling buffer work for halted ldisc\n"); - queue_work(system_unbound_wq, &tty->port->buf.work); + tty_buffer_restart_work(tty->port); } } @@ -1179,8 +1179,6 @@ static void n_tty_receive_break(struct tty_struct *tty) put_tty_queue('\0', ldata); } put_tty_queue('\0', ldata); - if (waitqueue_active(&tty->read_wait)) - wake_up_interruptible_poll(&tty->read_wait, POLLIN); } /** @@ -1237,8 +1235,6 @@ static void n_tty_receive_parity_error(struct tty_struct *tty, unsigned char c) put_tty_queue('\0', ldata); } else put_tty_queue(c, ldata); - if (waitqueue_active(&tty->read_wait)) - wake_up_interruptible_poll(&tty->read_wait, POLLIN); } static void @@ -2142,37 +2138,15 @@ extern ssize_t redirected_tty_write(struct file *, const char __user *, static int job_control(struct tty_struct *tty, struct file *file) { - struct pid *pgrp; - /* Job control check -- must be done at start and after every sleep (POSIX.1 7.1.1.4). */ /* NOTE: not yet done after every sleep pending a thorough check of the logic of this change. -- jlc */ /* don't stop on /dev/console */ - if (file->f_op->write == redirected_tty_write || - current->signal->tty != tty) + if (file->f_op->write == redirected_tty_write) return 0; - rcu_read_lock(); - pgrp = task_pgrp(current); - - spin_lock_irq(&tty->ctrl_lock); - if (!tty->pgrp) - printk(KERN_ERR "n_tty_read: no tty->pgrp!\n"); - else if (pgrp != tty->pgrp) { - spin_unlock_irq(&tty->ctrl_lock); - if (is_ignored(SIGTTIN) || is_current_pgrp_orphaned()) { - rcu_read_unlock(); - return -EIO; - } - kill_pgrp(pgrp, SIGTTIN, 1); - rcu_read_unlock(); - set_thread_flag(TIF_SIGPENDING); - return -ERESTARTSYS; - } |