diff --git a/MAINTAINERS b/MAINTAINERS index 6a16f21117dfe9ecf281763e68c7a9f9cbce587a..716c548107dddd113fd68e256fa757bd3c8783f6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -161,7 +161,7 @@ M: Greg Kroah-Hartman L: linux-serial@vger.kernel.org W: http://serial.sourceforge.net S: Maintained -T: quilt kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ +T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6.git F: drivers/serial/8250* F: include/linux/serial_8250.h @@ -5910,7 +5910,7 @@ S: Maintained TTY LAYER M: Greg Kroah-Hartman S: Maintained -T: quilt kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ +T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6.git F: drivers/char/tty_* F: drivers/serial/serial_core.c F: include/linux/serial_core.h diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c index b0a70461a12c9c19269b8fe6c443251960c131b1..c0bd6f472c523a377f4d6efef8d90f8f6fbfe373 100644 --- a/drivers/char/amiserial.c +++ b/drivers/char/amiserial.c @@ -1299,7 +1299,6 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file, { struct async_struct * info = tty->driver_data; struct async_icount cprev, cnow; /* kernel counter temps */ - struct serial_icounter_struct icount; void __user *argp = (void __user *)arg; unsigned long flags; diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c index dd3f9b1f11b4f59685853873977b3913daf3b0a2..294d03e8c61a6a249b6008878efd08386c86d0a9 100644 --- a/drivers/char/nozomi.c +++ b/drivers/char/nozomi.c @@ -1828,7 +1828,6 @@ static int ntty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { struct port *port = tty->driver_data; - void __user *argp = (void __user *)arg; int rval = -ENOIOCTLCMD; DBG1("******** IOCTL, cmd: %d", cmd); diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index bfc10f89d9511d8f26367329c5b7658e8a6b526c..eaa41992fbe234a17bd1d102e05fd39229e0ac5d 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2796,6 +2796,7 @@ static const struct tty_operations mgslpc_ops = { .hangup = mgslpc_hangup, .tiocmget = tiocmget, .tiocmset = tiocmset, + .get_icount = mgslpc_get_icount, .proc_fops = &mgslpc_proc_fops, }; diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 4d8e14b7aa931bcf3de11c6e5805005e0bf413ca..dd5e1ac22251a86692ed79162baca4e0f728a4c4 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -2343,8 +2343,11 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, /* * CTS flow control flag and modem status interrupts + * Only disable MSI if no threads are waiting in + * serial_core::uart_wait_modem_status */ - up->ier &= ~UART_IER_MSI; + if (!waitqueue_active(&up->port.state->port.delta_msr_wait)) + up->ier &= ~UART_IER_MSI; if (!(up->bugs & UART_BUG_NOMSR) && UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c index 53be4d35a0aa171dde05ca5628d53a2b422443c7..842e3b2a02b1ceb35ecdf45ee172cd35d116a82c 100644 --- a/drivers/serial/8250_pci.c +++ b/drivers/serial/8250_pci.c @@ -2285,6 +2285,8 @@ static struct pciserial_board pci_boards[] __devinitdata = { static const struct pci_device_id softmodem_blacklist[] = { { PCI_VDEVICE(AL, 0x5457), }, /* ALi Corporation M5457 AC'97 Modem */ + { PCI_VDEVICE(MOTOROLA, 0x3052), }, /* Motorola Si3052-based modem */ + { PCI_DEVICE(0x1543, 0x3052), }, /* Si3052-based modem, default IDs */ }; /* @@ -2863,6 +2865,9 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_QUARTET_SERIAL, 0, 0, pbn_b0_4_1152000 }, + { PCI_VENDOR_ID_OXSEMI, 0x9505, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_b0_bt_2_921600 }, /* * The below card is a little controversial since it is the diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index a9eff2b18eab25ed0fb797f3e0a97be8e2b913c0..19cac9f610fd9aa154a976b44410f5bf8187f94f 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -23,6 +23,7 @@ #include #include #include +#include #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) @@ -33,12 +34,10 @@ #include #include -#ifdef CONFIG_SERIAL_BFIN_DMA -#include +#include #include #include #include -#endif #ifdef CONFIG_SERIAL_BFIN_MODULE # undef CONFIG_EARLY_PRINTK @@ -360,7 +359,6 @@ static void bfin_serial_tx_chars(struct bfin_serial_port *uart) UART_PUT_CHAR(uart, xmit->buf[xmit->tail]); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); uart->port.icount.tx++; - SSYNC(); } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) @@ -688,6 +686,13 @@ static int bfin_serial_startup(struct uart_port *port) # ifdef CONFIG_BF54x { + /* + * UART2 and UART3 on BF548 share interrupt PINs and DMA + * controllers with SPORT2 and SPORT3. UART rx and tx + * interrupts are generated in PIO mode only when configure + * their peripheral mapping registers properly, which means + * request corresponding DMA channels in PIO mode as well. + */ unsigned uart_dma_ch_rx, uart_dma_ch_tx; switch (uart->port.irq) { @@ -734,8 +739,7 @@ static int bfin_serial_startup(struct uart_port *port) IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_DISABLED, "BFIN_UART_CTS", uart)) { uart->cts_pin = -1; - pr_info("Unable to attach BlackFin UART CTS interrupt.\ - So, disable it.\n"); + pr_info("Unable to attach BlackFin UART CTS interrupt. So, disable it.\n"); } } if (uart->rts_pin >= 0) { @@ -747,8 +751,7 @@ static int bfin_serial_startup(struct uart_port *port) if (request_irq(uart->status_irq, bfin_serial_mctrl_cts_int, IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) { - pr_info("Unable to attach BlackFin UART Modem \ - Status interrupt.\n"); + pr_info("Unable to attach BlackFin UART Modem Status interrupt.\n"); } /* CTS RTS PINs are negative assertive. */ @@ -846,6 +849,8 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_cflag & CMSPAR) lcr |= STP; + spin_lock_irqsave(&uart->port.lock, flags); + port->read_status_mask = OE; if (termios->c_iflag & INPCK) port->read_status_mask |= (FE | PE); @@ -875,8 +880,6 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_line != N_IRDA) quot -= ANOMALY_05000230; - spin_lock_irqsave(&uart->port.lock, flags); - UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15); /* Disable UART */ @@ -1321,6 +1324,14 @@ struct console __init *bfin_earlyserial_init(unsigned int port, struct bfin_serial_port *uart; struct ktermios t; +#ifdef CONFIG_SERIAL_BFIN_CONSOLE + /* + * If we are using early serial, don't let the normal console rewind + * log buffer, since that causes things to be printed multiple times + */ + bfin_serial_console.flags &= ~CON_PRINTBUFFER; +#endif + if (port == -1 || port >= nr_active_ports) port = 0; bfin_serial_init_ports(); diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 04ef3ef0a422c5b6fae1e39284bb8e174d6a9dac..81b46585edf797561828f2adfac2e598543690f3 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -716,8 +716,8 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg) if (msg->len < 128) *--dp = (msg->len << 1) | EA; else { - *--dp = (msg->len >> 6) | EA; - *--dp = (msg->len & 127) << 1; + *--dp = ((msg->len & 127) << 1) | EA; + *--dp = (msg->len >> 6) & 0xfe; } } @@ -2375,6 +2375,7 @@ static int gsmld_config(struct tty_struct *tty, struct gsm_mux *gsm, gsm->mru = c->mru; gsm->encoding = c->encapsulation; gsm->adaption = c->adaption; + gsm->n2 = c->n2; if (c->i == 1) gsm->ftype = UIH; diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index cc1e9850d655fda3e700a8fe5b78b1218924424a..d8210ca007206628163efea3b2eb6dff473fadf7 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -413,7 +413,8 @@ static void flush_to_ldisc(struct work_struct *work) spin_lock_irqsave(&tty->buf.lock, flags); if (!test_and_set_bit(TTY_FLUSHING, &tty->flags)) { - struct tty_buffer *head; + struct tty_buffer *head, *tail = tty->buf.tail; + int seen_tail = 0; while ((head = tty->buf.head) != NULL) { int count; char *char_buf; @@ -423,6 +424,15 @@ static void flush_to_ldisc(struct work_struct *work) if (!count) { if (head->next == NULL) break; + /* + There's a possibility tty might get new buffer + added during the unlock window below. We could + end up spinning in here forever hogging the CPU + completely. To avoid this let's have a rest each + time we processed the tail buffer. + */ + if (tail == head) + seen_tail = 1; tty->buf.head = head->next; tty_buffer_free(tty, head); continue; @@ -432,7 +442,7 @@ static void flush_to_ldisc(struct work_struct *work) line discipline as we want to empty the queue */ if (test_bit(TTY_FLUSHPENDING, &tty->flags)) break; - if (!tty->receive_room) { + if (!tty->receive_room || seen_tail) { schedule_delayed_work(&tty->buf.work, 1); break; } diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 412f9775d19c5f2deee27b2174532e35ab3e14d1..d8e96b005023ad21ff22d143203ab0d59fb09611 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -47,6 +47,7 @@ static DEFINE_SPINLOCK(tty_ldisc_lock); static DECLARE_WAIT_QUEUE_HEAD(tty_ldisc_wait); +static DECLARE_WAIT_QUEUE_HEAD(tty_ldisc_idle); /* Line disc dispatch table */ static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS]; @@ -83,6 +84,7 @@ static void put_ldisc(struct tty_ldisc *ld) return; } local_irq_restore(flags); + wake_up(&tty_ldisc_idle); } /** @@ -530,6 +532,23 @@ static int tty_ldisc_halt(struct tty_struct *tty) return cancel_delayed_work_sync(&tty->buf.work); } +/** + * tty_ldisc_wait_idle - wait for the ldisc to become idle + * @tty: tty to wait for + * + * Wait for the line discipline to become idle. The discipline must + * have been halted for this to guarantee it remains idle. + */ +static int tty_ldisc_wait_idle(struct tty_struct *tty) +{ + int ret; + ret = wait_event_interruptible_timeout(tty_ldisc_idle, + atomic_read(&tty->ldisc->users) == 1, 5 * HZ); + if (ret < 0) + return ret; + return ret > 0 ? 0 : -EBUSY; +} + /** * tty_set_ldisc - set line discipline * @tty: the terminal to set @@ -634,8 +653,17 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) flush_scheduled_work(); + retval = tty_ldisc_wait_idle(tty); + tty_lock(); mutex_lock(&tty->ldisc_mutex); + + /* handle wait idle failure locked */ + if (retval) { + tty_ldisc_put(new_ldisc); + goto enable; + } + if (test_bit(TTY_HUPPED, &tty->flags)) { /* We were raced by the hangup method. It will have stomped the ldisc data and closed the ldisc down */ @@ -669,6 +697,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) tty_ldisc_put(o_ldisc); +enable: /* * Allow ldisc referencing to occur again */ @@ -714,9 +743,12 @@ static void tty_reset_termios(struct tty_struct *tty) * state closed */ -static void tty_ldisc_reinit(struct tty_struct *tty, int ldisc) +static int tty_ldisc_reinit(struct tty_struct *tty, int ldisc) { - struct tty_ldisc *ld; + struct tty_ldisc *ld = tty_ldisc_get(ldisc); + + if (IS_ERR(ld)) + return -1; tty_ldisc_close(tty, tty->ldisc); tty_ldisc_put(tty->ldisc); @@ -724,10 +756,10 @@ static void tty_ldisc_reinit(struct tty_struct *tty, int ldisc) /* * Switch the line discipline back */ - ld = tty_ldisc_get(ldisc); - BUG_ON(IS_ERR(ld)); tty_ldisc_assign(tty, ld); tty_set_termios_ldisc(tty, ldisc); + + return 0; } /** @@ -802,13 +834,16 @@ void tty_ldisc_hangup(struct tty_struct *tty) a FIXME */ if (tty->ldisc) { /* Not yet closed */ if (reset == 0) { - tty_ldisc_reinit(tty, tty->termios->c_line); - err = tty_ldisc_open(tty, tty->ldisc); + + if (!tty_ldisc_reinit(tty, tty->termios->c_line)) + err = tty_ldisc_open(tty, tty->ldisc); + else + err = 1; } /* If the re-open fails or we reset then go to N_TTY. The N_TTY open cannot fail */ if (reset || err) { - tty_ldisc_reinit(tty, N_TTY); + BUG_ON(tty_ldisc_reinit(tty, N_TTY)); WARN_ON(tty_ldisc_open(tty, tty->ldisc)); } tty_ldisc_enable(tty); diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c index 273ab44cc91d7510e4e779da98c5e13ebbbbe867..eab3a1ff99e43c2468d35a3c770154e80a9bf7cd 100644 --- a/drivers/tty/vt/vc_screen.c +++ b/drivers/tty/vt/vc_screen.c @@ -553,12 +553,12 @@ static unsigned int vcs_poll(struct file *file, poll_table *wait) { struct vcs_poll_data *poll = vcs_poll_data_get(file); - int ret = 0; + int ret = DEFAULT_POLLMASK|POLLERR|POLLPRI; if (poll) { poll_wait(file, &poll->waitq, wait); - if (!poll->seen_last_update) - ret = POLLIN | POLLRDNORM; + if (poll->seen_last_update) + ret = DEFAULT_POLLMASK; } return ret; } diff --git a/include/linux/tty.h b/include/linux/tty.h index 2a754748dd5f3ea049ee293acf8d548aea927da9..c7ea9bc8897cb638208a88bcb6352814b4639dc8 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -50,7 +50,7 @@ #define N_V253 19 /* Codec control over voice modem */ #define N_CAIF 20 /* CAIF protocol for talking to modems */ #define N_GSM0710 21 /* GSM 0710 Mux */ -#define N_TI_WL 22 /* for TI's WL BT, FM, GPS combo chips */ +#define N_TI_WL 22 /* for TI's WL BT, FM, GPS combo chips */ /* * This character is the same as _POSIX_VDISABLE: it cannot be used as