From a6833214cfc6fa8a7c59426af77794cc190c6cfc Mon Sep 17 00:00:00 2001 From: Steffen Trumtrar Date: Thu, 13 Dec 2012 14:27:43 +0100 Subject: mxs: uart: fix setting RTS from software With the patch "serial: mxs-auart: fix the wrong RTS hardware flow control" the mainline mxs-uart driver now sets RTSEN only when hardware flow control is enabled via software. It is not possible any longer to set RTS manually via software. However, the manual modification is a valid operation. Regain the possibility to set RTS via software and only set RTSEN when hardware flow control is explicitly enabled via settermios cflag CRTSCTS. Signed-off-by: Steffen Trumtrar Cc: stable Reviewed-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mxs-auart.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 6db23b035efe..9f63f8890a61 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -412,10 +412,12 @@ static void mxs_auart_set_mctrl(struct uart_port *u, unsigned mctrl) u32 ctrl = readl(u->membase + AUART_CTRL2); - ctrl &= ~AUART_CTRL2_RTSEN; + ctrl &= ~(AUART_CTRL2_RTSEN | AUART_CTRL2_RTS); if (mctrl & TIOCM_RTS) { if (tty_port_cts_enabled(&u->state->port)) ctrl |= AUART_CTRL2_RTSEN; + else + ctrl |= AUART_CTRL2_RTS; } s->ctrl = mctrl; -- cgit v1.2.3 From 87b8bed2ce9394870a87e4fb2aef6752b2bd837d Mon Sep 17 00:00:00 2001 From: "fabio.estevam@freescale.com" Date: Mon, 7 Jan 2013 23:11:06 -0200 Subject: serial: mxs-auart: Index is unsigned Fix the following warning when building with W=1 option: drivers/tty/serial/mxs-auart.c: In function 'mxs_auart_tx_chars': drivers/tty/serial/mxs-auart.c:272:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] Signed-off-by: Fabio Estevam Acked-by: Marek Vasut Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mxs-auart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 9f63f8890a61..e55615eb34ad 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -253,7 +253,7 @@ static void mxs_auart_tx_chars(struct mxs_auart_port *s) struct circ_buf *xmit = &s->port.state->xmit; if (auart_dma_enabled(s)) { - int i = 0; + u32 i = 0; int size; void *buffer = s->tx_dma_buf; -- cgit v1.2.3 From a6dd114e16cbc4410049a90a8a67b967333d108d Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Sun, 2 Dec 2012 05:10:44 -0500 Subject: tty: serial: vt8500: fix return value check in vt8500_serial_probe() In case of error, function of_clk_get() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Wei Yongjun Acked-by: Tony Prisk Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/vt8500_serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index 8fd181436a6b..d5ed9f613005 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -604,7 +604,7 @@ static int vt8500_serial_probe(struct platform_device *pdev) vt8500_port->uart.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; vt8500_port->clk = of_clk_get(pdev->dev.of_node, 0); - if (vt8500_port->clk) { + if (!IS_ERR(vt8500_port->clk)) { vt8500_port->uart.uartclk = clk_get_rate(vt8500_port->clk); } else { /* use the default of 24Mhz if not specified and warn */ -- cgit v1.2.3 From 4f7d67d0de0f0728ed258426a62ab555191cdfc8 Mon Sep 17 00:00:00 2001 From: Matt Schulte Date: Thu, 6 Dec 2012 22:19:58 -0600 Subject: tty/8250: pbn_b0_8_1152000_200 is supposed to be an 8 port definition tty/8250: pbn_b0_8_1152000_200 is supposed to be an 8 port definition Signed-off-by: Matt Schulte Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 26b9dc012ed0..bf2f1a0b9ae7 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -2246,7 +2246,7 @@ static struct pciserial_board pci_boards[] = { [pbn_b0_8_1152000_200] = { .flags = FL_BASE0, - .num_ports = 2, + .num_ports = 8, .base_baud = 1152000, .uart_offset = 0x200, }, -- cgit v1.2.3 From b7b9041b208d09c114d9d30ff1b7f860b7765f45 Mon Sep 17 00:00:00 2001 From: Matt Schulte Date: Thu, 6 Dec 2012 22:19:59 -0600 Subject: tty/8250: The correct device id for this card is 0x0022 The correct device id for this card is 0x0022 Signed-off-by: Matt Schulte Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index bf2f1a0b9ae7..8a2c3d934187 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1301,9 +1301,9 @@ pci_wch_ch353_setup(struct serial_private *priv, #define PCI_VENDOR_ID_AGESTAR 0x5372 #define PCI_DEVICE_ID_AGESTAR_9375 0x6872 #define PCI_VENDOR_ID_ASIX 0x9710 -#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0019 #define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020 #define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021 +#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ -- cgit v1.2.3 From 014b9b4ce84281ccb3d723c792bed19815f3571a Mon Sep 17 00:00:00 2001 From: chao bi Date: Wed, 12 Dec 2012 11:40:56 +0800 Subject: serial:ifx6x60:Delete SPI timer when shut down port When shut down SPI port, it's possible that MRDY has been asserted and a SPI timer was activated waiting for SRDY assert, in the case, it needs to delete this timer. Signed-off-by: Chen Jun Signed-off-by: channing Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/ifx6x60.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c index 675d94ab0aff..7eed3235dad4 100644 --- a/drivers/tty/serial/ifx6x60.c +++ b/drivers/tty/serial/ifx6x60.c @@ -637,6 +637,7 @@ static void ifx_port_shutdown(struct tty_port *port) clear_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags); mrdy_set_low(ifx_dev); + del_timer(&ifx_dev->spi_timer); clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags); tasklet_kill(&ifx_dev->io_work_tasklet); } -- cgit v1.2.3 From 2eaa865ffd66ca2e5a841e8c756d75f89e3482ae Mon Sep 17 00:00:00 2001 From: Thomas Abraham Date: Mon, 31 Dec 2012 13:42:45 -0800 Subject: serial: samsung: remove redundant setting of line config during port reset The setting of uart line control configuration in s3c24xx_serial_resetport is can be removed since the 'set_termios' call will overwrite any ULCON register setting which s3c24xx_serial_resetport does. Acked-by: Kukjin Kim Signed-off-by: Thomas Abraham Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 12e5249d053e..e514b3a4dc57 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1006,7 +1006,6 @@ static void s3c24xx_serial_resetport(struct uart_port *port, ucon &= ucon_mask; wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); /* reset both fifos */ wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); -- cgit v1.2.3 From 68e56cb3a068f9c30971c6117fbbd1e32918e49e Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Mon, 14 Jan 2013 20:09:26 +0100 Subject: tty: 8250_dw: Fix inverted arguments to serial_out in IRQ handler Signed-off-by: Maxime Ripard Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_dw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 1d0dba2d562d..096d2ef48b32 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -79,7 +79,7 @@ static int dw8250_handle_irq(struct uart_port *p) } else if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) { /* Clear the USR and write the LCR again. */ (void)p->serial_in(p, UART_USR); - p->serial_out(p, d->last_lcr, UART_LCR); + p->serial_out(p, UART_LCR, d->last_lcr); return 1; } -- cgit v1.2.3 From 5dd070d21e2cb34b4162d564d73cca3591f94389 Mon Sep 17 00:00:00 2001 From: channing Date: Wed, 16 Jan 2013 13:14:20 +0800 Subject: serial:ifx6x60:Keep word size accordance with SPI controller As protocol driver, IFX SPI driver initiate to setup SPI master with default SPI word size as 16 bit/word, however, SPI master may not adopt this default value due to SPI controller's capability, it might choose an available value by itself and set it to spi_device.bits_per_word. In order to keep align with Controller, IFX driver should make use of this value during SPI transfer, but the default one. Signed-off-by: Chen Jun Signed-off-by: channing Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/ifx6x60.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c index 7eed3235dad4..8cb6d8d66a13 100644 --- a/drivers/tty/serial/ifx6x60.c +++ b/drivers/tty/serial/ifx6x60.c @@ -811,7 +811,8 @@ static void ifx_spi_io(unsigned long data) ifx_dev->spi_xfer.cs_change = 0; ifx_dev->spi_xfer.speed_hz = ifx_dev->spi_dev->max_speed_hz; /* ifx_dev->spi_xfer.speed_hz = 390625; */ - ifx_dev->spi_xfer.bits_per_word = spi_bpw; + ifx_dev->spi_xfer.bits_per_word = + ifx_dev->spi_dev->bits_per_word; ifx_dev->spi_xfer.tx_buf = ifx_dev->tx_buffer; ifx_dev->spi_xfer.rx_buf = ifx_dev->rx_buffer; -- cgit v1.2.3 From ded2f295a36d17838fe97e80d7b6ea83381474f8 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Fri, 11 Jan 2013 12:06:27 +0100 Subject: pty: return EINVAL for TIOCGPTN for BSD ptys Commit bbb63c514a3464342967237a51a21ea8f61ab951 (drivers:tty:fix up ENOIOCTLCMD error handling) changed the default return value from tty ioctl to be ENOTTY and not EINVAL. This is appropriate. But in case of TIOCGPTN for the old BSD ptys glibc started failing because it expects EINVAL to be returned. Only then it continues to obtain the pts name the other way around. So fix this case by explicit return of EINVAL in this case. Signed-off-by: Jiri Slaby Reported-by: Florian Westphal Cc: Alan Cox Cc: stable # 3.7+ Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index be6a373601b7..79ff3a5e925d 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -441,6 +441,8 @@ static int pty_bsd_ioctl(struct tty_struct *tty, return pty_get_pktmode(tty, (int __user *)arg); case TIOCSIG: /* Send signal to other side of pty */ return pty_signal(tty, (int) arg); + case TIOCGPTN: /* TTY returns ENOTTY, but glibc expects EINVAL here */ + return -EINVAL; } return -ENOIOCTLCMD; } -- cgit v1.2.3 From ebebd49a8eab5e9aa1b1f8f1614ccc3c2120f886 Mon Sep 17 00:00:00 2001 From: Stephen Hurd Date: Thu, 17 Jan 2013 14:14:53 -0800 Subject: 8250/16?50: Add support for Broadcom TruManage redirected serial port Add support for the UART device present in Broadcom TruManage capable NetXtreme chips (ie: 5761m 5762, and 5725). This implementation has a hidden transmit FIFO, so running in single-byte interrupt mode results in too many interrupts. The UART_CAP_HFIFO capability was added to track this. It continues to reload the THR as long as the THRE and TSRE bits are set in the LSR up to a specified limit (1024 is used here). Signed-off-by: Stephen Hurd Signed-off-by: Michael Chan Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 11 +++++++++++ drivers/tty/serial/8250/8250.h | 1 + drivers/tty/serial/8250/8250_pci.c | 38 ++++++++++++++++++++++++++++++++++++++ include/uapi/linux/serial_core.h | 3 ++- 4 files changed, 52 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index d085e3a8ec06..f9320437a649 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -300,6 +300,12 @@ static const struct serial8250_config uart_config[] = { UART_FCR_R_TRIG_00 | UART_FCR_T_TRIG_00, .flags = UART_CAP_FIFO, }, + [PORT_BRCM_TRUMANAGE] = { + .name = "TruManage", + .fifo_size = 1, + .tx_loadsz = 1024, + .flags = UART_CAP_HFIFO, + }, [PORT_8250_CIR] = { .name = "CIR port" } @@ -1490,6 +1496,11 @@ void serial8250_tx_chars(struct uart_8250_port *up) port->icount.tx++; if (uart_circ_empty(xmit)) break; + if (up->capabilities & UART_CAP_HFIFO) { + if ((serial_port_in(port, UART_LSR) & BOTH_EMPTY) != + BOTH_EMPTY) + break; + } } while (--count > 0); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 3b4ea84898c2..12caa1292b75 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -40,6 +40,7 @@ struct serial8250_config { #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ #define UART_CAP_RTOIE (1 << 13) /* UART needs IER bit 4 set (Xscale, Tegra) */ +#define UART_CAP_HFIFO (1 << 14) /* UART has a "hidden" FIFO */ #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 8a2c3d934187..a27a98e1b066 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1085,6 +1085,18 @@ pci_omegapci_setup(struct serial_private *priv, return setup_port(priv, port, 2, idx * 8, 0); } +static int +pci_brcm_trumanage_setup(struct serial_private *priv, + const struct pciserial_board *board, + struct uart_8250_port *port, int idx) +{ + int ret = pci_default_setup(priv, board, port, idx); + + port->port.type = PORT_BRCM_TRUMANAGE; + port->port.flags = (port->port.flags | UPF_FIXED_PORT | UPF_FIXED_TYPE); + return ret; +} + static int skip_tx_en_setup(struct serial_private *priv, const struct pciserial_board *board, struct uart_8250_port *port, int idx) @@ -1304,6 +1316,7 @@ pci_wch_ch353_setup(struct serial_private *priv, #define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020 #define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021 #define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022 +#define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ @@ -1953,6 +1966,17 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .subdevice = PCI_ANY_ID, .setup = pci_xr17v35x_setup, }, + /* + * Broadcom TruManage (NetXtreme) + */ + { + .vendor = PCI_VENDOR_ID_BROADCOM, + .device = PCI_DEVICE_ID_BROADCOM_TRUMANAGE, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = pci_brcm_trumanage_setup, + }, + /* * Default "match everything" terminator entry */ @@ -2148,6 +2172,7 @@ enum pci_board_num_t { pbn_ce4100_1_115200, pbn_omegapci, pbn_NETMOS9900_2s_115200, + pbn_brcm_trumanage, }; /* @@ -2892,6 +2917,12 @@ static struct pciserial_board pci_boards[] = { .num_ports = 2, .base_baud = 115200, }, + [pbn_brcm_trumanage] = { + .flags = FL_BASE0, + .num_ports = 1, + .reg_shift = 2, + .base_baud = 115200, + }, }; static const struct pci_device_id blacklist[] = { @@ -4470,6 +4501,13 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_omegapci }, + /* + * Broadcom TruManage + */ + { PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BROADCOM_TRUMANAGE, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_brcm_trumanage }, + /* * AgeStar as-prs2-009 */ diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h index 78f99d97475b..2c6c85f18ea0 100644 --- a/include/uapi/linux/serial_core.h +++ b/include/uapi/linux/serial_core.h @@ -50,7 +50,8 @@ #define PORT_LPC3220 22 /* NXP LPC32xx SoC "Standard" UART */ #define PORT_8250_CIR 23 /* CIR infrared port, has its own driver */ #define PORT_XR17V35X 24 /* Exar XR17V35x UARTs */ -#define PORT_MAX_8250 24 /* max port ID */ +#define PORT_BRCM_TRUMANAGE 24 +#define PORT_MAX_8250 25 /* max port ID */ /* * ARM specific type numbers. These are not currently guaranteed -- cgit v1.2.3 From 50e244cc793d511b86adea24972f3a7264cae114 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 25 Jan 2013 10:28:15 +1000 Subject: fb: rework locking to fix lock ordering on takeover Adjust the console layer to allow a take over call where the caller already holds the locks. Make the fb layer lock in order. This is partly a band aid, the fb layer is terminally confused about the locking rules it uses for its notifiers it seems. [akpm@linux-foundation.org: remove stray non-ascii char, tidy comment] [akpm@linux-foundation.org: export do_take_over_console()] [airlied: cleanup another non-ascii char] Signed-off-by: Alan Cox Cc: Florian Tobias Schandinat Cc: Stephen Rothwell Cc: Jiri Kosina Cc: stable Tested-by: Sedat Dilek Reviewed-by: Daniel Vetter Signed-off-by: Andrew Morton Signed-off-by: Dave Airlie --- drivers/tty/vt/vt.c | 93 ++++++++++++++++++++++++++++++++----------- drivers/video/console/fbcon.c | 29 +++++++++++++- drivers/video/fbmem.c | 5 +-- drivers/video/fbsysfs.c | 3 ++ include/linux/console.h | 1 + 5 files changed, 104 insertions(+), 27 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 8fd89687d068..c076af0b300b 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2987,7 +2987,7 @@ int __init vty_init(const struct file_operations *console_fops) static struct class *vtconsole_class; -static int bind_con_driver(const struct consw *csw, int first, int last, +static int do_bind_con_driver(const struct consw *csw, int first, int last, int deflt) { struct module *owner = csw->owner; @@ -2998,7 +2998,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last, if (!try_module_get(owner)) return -ENODEV; - console_lock(); + WARN_CONSOLE_UNLOCKED(); /* check if driver is registered */ for (i = 0; i < MAX_NR_CON_DRIVER; i++) { @@ -3083,11 +3083,22 @@ static int bind_con_driver(const struct consw *csw, int first, int last, retval = 0; err: - console_unlock(); module_put(owner); return retval; }; + +static int bind_con_driver(const struct consw *csw, int first, int last, + int deflt) +{ + int ret; + + console_lock(); + ret = do_bind_con_driver(csw, first, last, deflt); + console_unlock(); + return ret; +} + #ifdef CONFIG_VT_HW_CONSOLE_BINDING static int con_is_graphics(const struct consw *csw, int first, int last) { @@ -3199,9 +3210,9 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) if (!con_is_bound(csw)) con_driver->flag &= ~CON_DRIVER_FLAG_INIT; - console_unlock(); /* ignore return value, binding should not fail */ - bind_con_driver(defcsw, first, last, deflt); + do_bind_con_driver(defcsw, first, last, deflt); + console_unlock(); err: module_put(owner); return retval; @@ -3492,28 +3503,18 @@ int con_debug_leave(void) } EXPORT_SYMBOL_GPL(con_debug_leave); -/** - * register_con_driver - register console driver to console layer - * @csw: console driver - * @first: the first console to take over, minimum value is 0 - * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 - * - * DESCRIPTION: This function registers a console driver which can later - * bind to a range of consoles specified by @first and @last. It will - * also initialize the console driver by calling con_startup(). - */ -int register_con_driver(const struct consw *csw, int first, int last) +static int do_register_con_driver(const struct consw *csw, int first, int last) { struct module *owner = csw->owner; struct con_driver *con_driver; const char *desc; int i, retval = 0; + WARN_CONSOLE_UNLOCKED(); + if (!try_module_get(owner)) return -ENODEV; - console_lock(); - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { con_driver = ®istered_con_driver[i]; @@ -3566,10 +3567,29 @@ int register_con_driver(const struct consw *csw, int first, int last) } err: - console_unlock(); module_put(owner); return retval; } + +/** + * register_con_driver - register console driver to console layer + * @csw: console driver + * @first: the first console to take over, minimum value is 0 + * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 + * + * DESCRIPTION: This function registers a console driver which can later + * bind to a range of consoles specified by @first and @last. It will + * also initialize the console driver by calling con_startup(). + */ +int register_con_driver(const struct consw *csw, int first, int last) +{ + int retval; + + console_lock(); + retval = do_register_con_driver(csw, first, last); + console_unlock(); + return retval; +} EXPORT_SYMBOL(register_con_driver); /** @@ -3623,17 +3643,44 @@ EXPORT_SYMBOL(unregister_con_driver); * when a driver wants to take over some existing consoles * and become default driver for newly opened ones. * - * take_over_console is basically a register followed by unbind + * take_over_console is basically a register followed by unbind + */ +int do_take_over_console(const struct consw *csw, int first, int last, int deflt) +{ + int err; + + err = do_register_con_driver(csw, first, last); + /* + * If we get an busy error we still want to bind the console driver + * and return success, as we may have unbound the console driver + * but not unregistered it. + */ + if (err == -EBUSY) + err = 0; + if (!err) + do_bind_con_driver(csw, first, last, deflt); + + return err; +} +EXPORT_SYMBOL_GPL(do_take_over_console); + +/* + * If we support more console drivers, this function is used + * when a driver wants to take over some existing consoles + * and become default driver for newly opened ones. + * + * take_over_console is basically a register followed by unbind */ int take_over_console(const struct consw *csw, int first, int last, int deflt) { int err; err = register_con_driver(csw, first, last); - /* if we get an busy error we still want to bind the console driver + /* + * If we get an busy error we still want to bind the console driver * and return success, as we may have unbound the console driver -  * but not unregistered it. - */ + * but not unregistered it. + */ if (err == -EBUSY) err = 0; if (!err) diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index fdefa8fd72c4..4bd7820cf4d0 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -529,6 +529,33 @@ static int search_for_mapped_con(void) return retval; } +static int do_fbcon_takeover(int show_logo) +{ + int err, i; + + if (!num_registered_fb) + return -ENODEV; + + if (!show_logo) + logo_shown = FBCON_LOGO_DONTSHOW; + + for (i = first_fb_vc; i <= last_fb_vc; i++) + con2fb_map[i] = info_idx; + + err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, + fbcon_is_default); + + if (err) { + for (i = first_fb_vc; i <= last_fb_vc; i++) + con2fb_map[i] = -1; + info_idx = -1; + } else { + fbcon_has_console_bind = 1; + } + + return err; +} + static int fbcon_takeover(int show_logo) { int err, i; @@ -3115,7 +3142,7 @@ static int fbcon_fb_registered(struct fb_info *info) } if (info_idx != -1) - ret = fbcon_takeover(1); + ret = do_fbcon_takeover(1); } else { for (i = first_fb_vc; i <= last_fb_vc; i++) { if (con2fb_map_boot[i] == idx) diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 3ff0105a496a..d8d9831b3fdb 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1650,7 +1650,9 @@ static int do_register_framebuffer(struct fb_info *fb_info) event.info = fb_info; if (!lock_fb_info(fb_info)) return -ENODEV; + console_lock(); fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); + console_unlock(); unlock_fb_info(fb_info); return 0; } @@ -1853,11 +1855,8 @@ int fb_new_modelist(struct fb_info *info) err = 1; if (!list_empty(&info->modelist)) { - if (!lock_fb_info(info)) - return -ENODEV; event.info = info; err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); - unlock_fb_info(info); } return err; diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c index a55e3669d135..ef476b02fbe5 100644 --- a/drivers/video/fbsysfs.c +++ b/drivers/video/fbsysfs.c @@ -177,6 +177,8 @@ static ssize_t store_modes(struct device *device, if (i * sizeof(struct fb_videomode) != count) return -EINVAL; + if (!lock_fb_info(fb_info)) + return -ENODEV; console_lock(); list_splice(&fb_info->modelist, &old_list); fb_videomode_to_modelist((const struct fb_videomode *)buf, i, @@ -188,6 +190,7 @@ static ssize_t store_modes(struct device *device, fb_destroy_modelist(&old_list); console_unlock(); + unlock_fb_info(fb_info); return 0; } diff --git a/include/linux/console.h b/include/linux/console.h index dedb082fe50f..4ef4307dfb82 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -78,6 +78,7 @@ int con_is_bound(const struct consw *csw); int register_con_driver(const struct consw *csw, int first, int last); int unregister_con_driver(const struct consw *csw); int take_over_console(const struct consw *sw, int first, int last, int deflt); +int do_take_over_console(const struct consw *sw, int first, int last, int deflt); void give_up_console(const struct consw *sw); #ifdef CONFIG_HW_CONSOLE int con_debug_enter(struct vc_data *vc); -- cgit v1.2.3 From e93a9a868792ad71cdd09d75e5a02d8067473c4e Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 25 Jan 2013 10:28:18 +1000 Subject: fb: Yet another band-aid for fixing lockdep mess I've still got lockdep warnings even after Alan's patch, and it seems that yet more band aids are required to paper over similar paths for unbind_con_driver() and unregister_con_driver(). After this hack, lockdep warnings are finally gone. Signed-off-by: Takashi Iwai Cc: Alan Cox Cc: Florian Tobias Schandinat Cc: Jiri Kosina Cc: stable Tested-by: Sedat Dilek Signed-off-by: Andrew Morton Signed-off-by: Dave Airlie --- drivers/tty/vt/vt.c | 43 ++++++++++++++++++++++++++++--------------- drivers/video/console/fbcon.c | 4 ++-- drivers/video/fbmem.c | 4 ++++ include/linux/console.h | 1 + include/linux/vt_kern.h | 2 ++ 5 files changed, 37 insertions(+), 17 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index c076af0b300b..457c41fe7eb9 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -3134,6 +3134,18 @@ static int con_is_graphics(const struct consw *csw, int first, int last) * or 0 on success. */ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) +{ + int retval; + + console_lock(); + retval = do_unbind_con_driver(csw, first, last, deflt); + console_unlock(); + return retval; +} +EXPORT_SYMBOL(unbind_con_driver); + +/* unlocked version of unbind_con_driver() */ +int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) { struct module *owner = csw->owner; const struct consw *defcsw = NULL; @@ -3143,7 +3155,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) if (!try_module_get(owner)) return -ENODEV; - console_lock(); + WARN_CONSOLE_UNLOCKED(); /* check if driver is registered and if it is unbindable */ for (i = 0; i < MAX_NR_CON_DRIVER; i++) { @@ -3156,10 +3168,8 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) } } - if (retval) { - console_unlock(); + if (retval) goto err; - } retval = -ENODEV; @@ -3175,15 +3185,11 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) } } - if (retval) { - console_unlock(); + if (retval) goto err; - } - if (!con_is_bound(csw)) { - console_unlock(); + if (!con_is_bound(csw)) goto err; - } first = max(first, con_driver->first); last = min(last, con_driver->last); @@ -3212,13 +3218,12 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) /* ignore return value, binding should not fail */ do_bind_con_driver(defcsw, first, last, deflt); - console_unlock(); err: module_put(owner); return retval; } -EXPORT_SYMBOL(unbind_con_driver); +EXPORT_SYMBOL_GPL(do_unbind_con_driver); static int vt_bind(struct con_driver *con) { @@ -3605,9 +3610,18 @@ EXPORT_SYMBOL(register_con_driver); */ int unregister_con_driver(const struct consw *csw) { - int i, retval = -ENODEV; + int retval; console_lock(); + retval = do_unregister_con_driver(csw); + console_unlock(); + return retval; +} +EXPORT_SYMBOL(unregister_con_driver); + +int do_unregister_con_driver(const struct consw *csw) +{ + int i, retval = -ENODEV; /* cannot unregister a bound driver */ if (con_is_bound(csw)) @@ -3633,10 +3647,9 @@ int unregister_con_driver(const struct consw *csw) } } err: - console_unlock(); return retval; } -EXPORT_SYMBOL(unregister_con_driver); +EXPORT_SYMBOL_GPL(do_unregister_con_driver); /* * If we support more console drivers, this function is used diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 4bd7820cf4d0..2aef9cac4d18 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -3004,7 +3004,7 @@ static int fbcon_unbind(void) { int ret; - ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, + ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, fbcon_is_default); if (!ret) @@ -3077,7 +3077,7 @@ static int fbcon_fb_unregistered(struct fb_info *info) primary_device = -1; if (!num_registered_fb) - unregister_con_driver(&fb_con); + do_unregister_con_driver(&fb_con); return 0; } diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index d8d9831b3fdb..070b9a13d892 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1668,8 +1668,10 @@ static int do_unregister_framebuffer(struct fb_info *fb_info) if (!lock_fb_info(fb_info)) return -ENODEV; + console_lock(); event.info = fb_info; ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); + console_unlock(); unlock_fb_info(fb_info); if (ret) @@ -1684,7 +1686,9 @@ static int do_unregister_framebuffer(struct fb_info *fb_info) num_registered_fb--; fb_cleanup_device(fb_info); event.info = fb_info; + console_lock(); fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); + console_unlock(); /* this may free fb info */ put_fb_info(fb_info); diff --git a/include/linux/console.h b/include/linux/console.h index 4ef4307dfb82..47b858cffc47 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -77,6 +77,7 @@ extern const struct consw prom_con; /* SPARC PROM console */ int con_is_bound(const struct consw *csw); int register_con_driver(const struct consw *csw, int first, int last); int unregister_con_driver(const struct consw *csw); +int do_unregister_con_driver(const struct consw *csw); int take_over_console(const struct consw *sw, int first, int last, int deflt); int do_take_over_console(const struct consw *sw, int first, int last, int deflt); void give_up_console(const struct consw *sw); diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h index 50ae7d0c279e..dbbc6bfee71f 100644 --- a/include/linux/vt_kern.h +++ b/include/linux/vt_kern.h @@ -130,6 +130,8 @@ void vt_event_post(unsigned int event, unsigned int old, unsigned int new); int vt_waitactive(int n); void change_console(struct vc_data *new_vc); void reset_vc(struct vc_data *vc); +extern int do_unbind_con_driver(const struct consw *csw, int first, int last, + int deflt); extern int unbind_con_driver(const struct consw *csw, int first, int last, int deflt); int vty_init(const struct file_operations *console_fops); -- cgit v1.2.3