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2014-09-08tty: vt8500_serial: add polled console functionsAlexey Charkov
This adds simple polling functions for single-character transmit and receive, as used by kgdb. Signed-off-by: Alexey Charkov <alchark@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: vt8500_serial: add missing support for RTS settingAlexey Charkov
Signed-off-by: Alexey Charkov <alchark@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: vt8500_serial: add support for UART in WM8880 chipsAlexey Charkov
Newer WonderMedia chips introduced another flag in the UART line control register, which controls whether RTS/CTS signalling should be handled in the driver or by the hardware itself. This patch ensures that the kernel can control RTS/CTS (including disabling it altogether) by forcing this flag to software mode on affected chips (only WM8880 so far). Also remove the redundant copy of the binding doc, while we are here. Signed-off-by: Alexey Charkov <alchark@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: kgdb_nmi: No CON_ENABLED by defaultDaniel Thompson
At present this console is optionally registered by NULL checking arch_kgdb_ops.enable_nmi. In practice this requires the architecture dependant code to implement some kind of control (e.g. module arguments) to enable/disable this feature. The kernel already provides us the perfectly adequate console= argument to enable/disable consoles. Let's use that instead! Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: amba-pl011: Use container_of() to get uart_amba_portDaniel Thompson
Universally adopt container_of() for all pointer conversion from uart_port to uart_amba_port. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: imx: clean up imx_poll_get_char()Dirk Behme
Looking at the get_poll_char() function of the 8250.c serial driver, we learn: * poll_get_char() doesn't have to save/disable/restore the interrupt registers. No interrupt handling is needed in this function at all. Remove it. * Don't block in case there is no data available. So instead blocking in the do {} while loop, just return with NO_POLL_CHAR, immediately . Additionally, while the i.MX6 register URXD[7-0] contain the RX_DATA, the upper bits of this register (URXD[15-10]) might contain some control flags. To ensure that these are not returned with the data read, just mask out URXD[7-0]. These changes fix the 'hang' working with kdb: $ echo ttymxc3 > /sys/module/kgdboc/parameters/kgdboc $ echo g >/proc/sysrq-trigger [0]kdb> help ... <hang> Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: core: Unwrap tertiary assignment in uart_handle_dcd_change()Peter Hurley
Prepare for spin lock assertion; move non-trivial assignment into function body. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: 8250: Document serial8250_modem_status() lockingPeter Hurley
Existing callers of serial8250_modem_status() [1] hold the uart port lock; document. [1] In-tree callers of serial8250_modem_status() drivers/tty/serial/8250/8250_fsl.c fsl8250_handle_irq() drivers/tty/serial/8250/8250_core.c serial8250_handle_irq() serial8250_console_write() serial8250_get_mctrl() * * Call graphs for callers of serial8250_get_mctrl() from the function which acquires the uart port lock drivers/tty/serial/serial_core.c uart_port_startup() uart_tiocmget() uart_set_termios() uart_carrier_raised() ops->get_mctrl() ---> serial8250_get_mctrl() Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: blackfin: Fix missing gpio.hPeter Hurley
If CONFIG_SERIAL_BFIN_CTSRTS is set, compile fails because of missing declarations for the gpio_* api. Include necessary header. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: sunsab: Don't enable tx if tx stoppedPeter Hurley
The serial core may call the UART driver's start_tx() even if tx is stopped; the UART driver must verify tx should be enabled before transmitting. Reported-by: Sam Ravnborg <sam@ravnborg.org> cc: David S. Miller <davem@davemloft.net> cc: <sparclinux@vger.kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: mpc52xx: Use default serial core x_char handlerPeter Hurley
mpc52xx_uart_send_xchar() is _identical_ to the default serial core x_char handling behavior in uart_send_xchar(). Remove mpc52xx_uart_send_xchar(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: Fix send_xchar() handlersPeter Hurley
START_CHAR() & STOP_CHAR() can be disabled if set to '\0' (__DISABLED_CHAR). UART drivers which define a send_xchar() handler must not transmit __DISABLED_CHAR. Document requirement. Affected drivers: sunsab sunhv cc: David S. Miller <davem@davemloft.net> cc: <sparclinux@vger.kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: core: Remove unsafe x_char optimizationPeter Hurley
uart_unthrottle() attempts to avoid sending START and the previous x_char if the previous x_char has not yet been sent. However, this optimization could leave the sender in a throttled state; for example, if the sender is throttled and this unthrottle coincides with a manual tcflow(TCION) from user-space, then neither START would be sent. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: core: Fix x_char racePeter Hurley
The UART driver is expected to clear port->x_char after transmission while holding the port->lock. However, the serial core fails to take the port->lock before assigning port->xchar. This allows for the following race CPU 0 | CPU 1 | | serial8250_handle_irq | ... | serial8250_tx_chars | if (port->x_char) | serial_out(up, UART_TX, port->x_char) uart_send_xchar | port->x_char = ch | | port->x_char = 0 port->ops->start_tx() | | The x_char on CPU 0 will never be sent. Take the port->lock in uart_send_xchar() before assigning port->x_char. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: imx: Fix x_char handling and tx flow controlPeter Hurley
The serial core expects the UART driver to transmit x_char (START/STOP chars) even if tx is stopped and before data already in the tx ring buffer if possible. Also, sending x_char must not cause additional data in the tx ring buffer to transmit if tx is stopped. Cause x_char to be transmitted before any other data is sent. Auto-stop tx if the tx ring buffer is empty or tx should be stopped. Only perform one write wakeup if tx ring buffer space is below threshold. x_char handling in DMA mode is still broken; add FIXME. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: Style fixPeter Hurley
Unwrap if() conditional; no functional change. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08Revert "serial: uart: add hw flow control support configuration"Peter Hurley
This reverts commit 06aa82e498c144c7784a6f3d3b55458b272d6146. This commit purports to enable auto CTS flow control for the 8250 UART driver. However, the 8250 UART driver already supports auto CTS flow control via UART_CAP_AFE and UART_CAP_EFR. Indeed, this patch introduces another DT attribute for which an existing firmware flag already exists ("auto-flow-control"). Furthermore, the use of UPF_HARD_FLOW requires the UART driver to define .throttle and .unthrottle methods, neither of which are defined for the 8250 UART driver (which will result in a NULL ptr dereference). Finally, this patch supposes to fix existing bugs in the serial core for auto CTS-enabled hardware, but does not include the class of hardware for which these bugs exist. CC: Murali Karicheri <m-karicheri2@ti.com> CC: Rob Herring <robh+dt@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty/serial: samsung: enable usage for 64-bit Exynos platformsNaveen Krishna Chatradhi
Allow Samsung serial driver to be usable on Exynos 64-bit SoC based platforms. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: vr41xx_siu: delete double assignmentJulia Lawall
Delete successive assignments to the same location. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression i; @@ *i = ...; i = ...; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: Fix build failure caused by missing header filePranith Kumar
Fix build failure caused by missing header file: drivers/tty/serial/nwpserial.c: In function 'wait_for_bits': drivers/tty/serial/nwpserial.c:53:3: error: implicit declaration of function 'udelay' [-Werror=implicit-function-declaration] Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08ARM: meson: serial: add MesonX SoC on-chip uart driverCarlo Caione
The SoC has four fully functional UARTs which use the same programming model. They are named UART_A, UART_B, UART_C and UART_AO (Always-On) which cannot be powered off. Signed-off-by: Carlo Caione <carlo@caione.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08drivers/tty/nozomi.c: Use 'nozomi_setup_memory' instead of 'setup_memory'Chen Gang
Several architectures (e.g. microblaze, um, and score) have already have extern 'setup_memory', so need use 'nozomi_setup_memory' instead of, or will cause compiling issue. The related error (with allmodconfig for microblaze): CC [M] drivers/tty/nozomi.o drivers/tty/nozomi.c:526:13: error: conflicting types for 'setup_memory' static void setup_memory(struct nozomi *dc) ^ In file included from include/linux/mm.h:51:0, from ./arch/microblaze/include/asm/io.h:17, from include/linux/io.h:22, from include/linux/pci.h:31, from drivers/tty/nozomi.c:46: ./arch/microblaze/include/asm/pgtable.h:569:6: note: previous declaration of 'setup_memory' was here void setup_memory(void); ^ Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Acked-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: uartlite: Remove .owner field for driverMichal Simek
There is no need to init .owner field. Based on the patch from Peter Griffin <peter.griffin@linaro.org> "mmc: remove .owner field for drivers using module_platform_driver" This patch removes the superflous .owner field for drivers which use the module_platform_driver API, as this is overriden in platform_driver_register anyway." Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: xuartps: Remove .owner field for driverMichal Simek
There is no need to init .owner field. Based on the patch from Peter Griffin <peter.griffin@linaro.org> "mmc: remove .owner field for drivers using module_platform_driver" This patch removes the superflous .owner field for drivers which use the module_platform_driver API, as this is overriden in platform_driver_register anyway." Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: 8250_hp300: trivial: fix symbol name in #warning messageDaniele Forsi
The symbol is defined in drivers/tty/serial/8250/Kconfig as "SERIAL_8250", not just "8250". Signed-off-by: Daniele Forsi <dforsi@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: Fix spurious poll() wakeupsPeter Hurley
When the N_TTY line discipline receives data and wakes readers to process the input, polling writers are also mistakenly woken. This is because, although readers and writers are differentiated by different wait queues (tty->read_wait & tty->write_wait), both wait queues are polled together. Thus, reader wakeups without poll flags still cause poll(POLLOUT) to wakeup. For received data, wakeup readers with POLLIN. Preserve the unspecific wakeup in n_tty_packet_mode_flush(), as this action should flag both POLLIN and POLLOUT. Fixes epoll_wait() for edge-triggered EPOLLOUT. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: Fix potential use after free in release_one_ttyCyrill Gorcunov
In case if we're releasing the last tty reference the following call sequence is possible tty_driver_kref_put destruct_tty_driver kfree(driver); where @driver is used in next module_put call, which leads to | [ 285.964007] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 | [ 285.964007] Workqueue: events release_one_tty | [ 285.964007] task: ffff8800cc7ea5f0 ti: ffff8800cb800000 task.ti: ffff8800cb800000 | [ 285.964007] RIP: 0010:[<ffffffff810aeaf5>] [<ffffffff810aeaf5>] module_put+0x24/0xf4 | [ 285.964007] RSP: 0018:ffff8800cb801d48 EFLAGS: 00010213 | [ 285.964007] RAX: ffff8800cb801fd8 RBX: ffff8800ca3429d0 RCX: ffff8800cb1db400 | [ 285.964007] RDX: 0000000000000000 RSI: ffffffff817349c1 RDI: 0000000000000001 | [ 285.964007] RBP: ffff8800cb801d60 R08: ffff8800cd632b40 R09: 0000000000000000 | [ 285.964007] R10: 00000000ffffffff R11: ffff88011f40a000 R12: 6b6b6b6b6b6b6b6b | [ 285.964007] R13: ffff8800ca342520 R14: 0000000000000000 R15: ffff88011f5d8200 | [ 285.964007] FS: 0000000000000000(0000) GS:ffff88011f400000(0000) knlGS:0000000000000000 | [ 285.964007] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b | [ 285.964007] CR2: 00007faf5229d090 CR3: 0000000001c0b000 CR4: 00000000000006f0 | [ 285.964007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 | [ 285.964007] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 | [ 285.964007] Stack: | [ 285.964007] ffff8800ca3429d0 ffff8800ca342a30 ffff8800ca342520 ffff8800cb801d88 | [ 285.964007] ffffffff8146554a ffff8800cc77cc78 ffff8800ca3429d0 ffff88011f5d3800 | [ 285.964007] ffff8800cb801e08 ffffffff810683c1 ffffffff810682ff 0000000000000046 | [ 285.964007] Call Trace: | [ 285.964007] [<ffffffff8146554a>] release_one_tty+0x54/0xa3 | [ 285.964007] [<ffffffff810683c1>] process_one_work+0x223/0x404 | [ 285.964007] [<ffffffff810682ff>] ? process_one_work+0x161/0x404 | [ 285.964007] [<ffffffff81068971>] worker_thread+0x136/0x205 | [ 285.964007] [<ffffffff8106883b>] ? rescuer_thread+0x26a/0x26a | [ 285.964007] [<ffffffff8106e5bf>] kthread+0xa2/0xaa | [ 285.964007] [<ffffffff810a4586>] ? trace_hardirqs_on_caller+0x16/0x1eb | [ 285.964007] [<ffffffff8106e51d>] ? __kthread_parkme+0x65/0x65 | [ 285.964007] [<ffffffff8173f59c>] ret_from_fork+0x7c/0xb0 | [ 285.964007] [<ffffffff8106e51d>] ? __kthread_parkme+0x65/0x65 | [ 285.964007] Code: 09 00 5b 41 5c 5d c3 0f 1f 44 00 00 55 48 85 ff 48 89 e5 41 55 41 54 49 89 fc 53 0f 84 d3 00 | 00 00 bf 01 00 00 00 e8 d0 a1 fc ff <49> 8b 84 24 50 02 00 00 65 48 ff 40 08 4c 8b 6d 08 0f 1f 44 00 so simply keep a local reference to the module owner and use it later. CC: Pavel Emelyanov <xemul@parallels.com> CC: Jiri Slaby <jslaby@suse.cz> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: msm_serial: Fix kgdb continueStephen Boyd
Frank reports that after continuing in kgdb the RX stale event doesn't occur until after the RX fifo is filled up with exactly the amount of characters programmed for the RX watermark (in this case it's 48). To read a single character from the uartdm hardware we force a stale event so that any characters in the RX packing buffer are flushed into the RX fifo immediately instead of waiting for a stale timeout or for the fifo to fill. Forcing that stale event asserts the stale interrupt but we never clear that interrupt via UART_CR_CMD_RESET_STALE_INT in the polling functions. So when kgdb continues the stale interrupt is left pending in the hardware and we don't timeout with a stale event, like we usually would if a user typed one character on the console, until the reset stale interrupt and stale event commands are sent. Frank could get things working again by running handle_rx_dm(). By putting enough characters into the fifo he could trigger a watermark interrupt, and thus cause handle_rx_dm() to run finally resetting the stale interrupt and enabling the stale event so that single characters would cause timeouts again. The fix is to just do what the interrupt routine was doing all along and clear the stale interrupt and enable the event again. Doing this also smooths over any differences in the fifo behavior between v1.3 and v1.4 hardware allowing us to skip forcing the uart into single character mode. Reviewed-by: Frank Rowand <frank.rowand@sonymobile.com> Tested-by: Frank Rowand <frank.rowand@sonymobile.com> Fixes: f7e54d7ad743 "msm_serial: Add support for poll_{get,put}_char()" Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08TTY: fix decimal printf format specifiers prefixed with 0xHans Wennborg
The prefix suggests the number should be printed in hex, so use the %x specifier to do that. Found by using regex suggested by Joe Perches. Signed-off-by: Hans Wennborg <hans@hanshq.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: clps711x: Use mctrl_gpio helpers for handling modem signalsAlexander Shiyan
CLPS711X serial driver uses the system wide registers to control the modem signals. Now gpio-syscon driver can be used for this purposes. mctrl_gpio helpers allow us to create GPIO bindings for any of modem/tty control signals that extends the functionality of the driver. This patch makes such change. This change does not break any current DT bindings, since DT support for this platform is not introduced yet. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: serial_core.c: printk replacementSudip Mukherjee
printk replaced with corresponding dev_* . fixed two broken user-visible strings used by the corresponding printk. the null check for uport->dev and port->dev is removed as dev_* will check for null while printing. printing of dev_name(uport->dev) and dev_name(port->dev) also removed as those are being printed by dev_* . Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: fix typo in comment of tty_termios_encode_baud_rateMatthias Brugger
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: altera: Make of_device_id arrays constTobias Klauser
Make the of_device_id arrays const, as it is handled as const by all OF functions. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: msm: Fix 'void function return statements are not generally ↵Kiran Padwal
useful' warning fixed below checkpatch.pl warning: WARNING: void function return statements are not generally useful Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: msm: Fix 'else is not generally useful after a break or return' ↵Kiran Padwal
warning fixed below checkpatch.pl warning: WARNING: else is not generally useful after a break or return Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: msm: Fix style warnings relating to printk()Kiran Padwal
fixed below checkpatch.pl warning: WARNING: Prefer [subsystem eg: netdev]_err([subsystem]dev, ... then dev_err(dev, ... then pr_err(... to printk(KERN_ERR ... WARNING: Prefer [subsystem eg: netdev]_info([subsystem]dev, ... then dev_info(dev, ... then pr_info(... to printk(KERN_INFO ... Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: msm: Fix 'Missing a blank line after declarations' warningKiran Padwal
This patch fixes below checkpatch.pl warning and it remove extra blank lines: WARNING: Missing a blank line after declarations Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08tty: serial: msm: remove braces {} in msm_serial.cKiran Padwal
fixed below checkpatch.pl warning: WARNING: braces {} are not necessary for any arm of this statement Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial: Add support for Fintek F81216A LPC to 4 UARTRicardo Ribalda Delgado
This patch lets you set the RS485 cappabilites of the device through TIOCSRS485 and TIOCGRS485 as defined on Documentation/serial/serial-rs485.txt In order to probe the device, the PNP id and the device id is used. Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08serial/8250: Add support for RS485 IOCTLsRicardo Ribalda Delgado
This patch allow the users of the 8250 infrastructure to define a handler for RS485 configration. If no handler is defined the 8250 driver will work as usual. Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Acked-by: Alan Cox <alan@linux.intel.com> -- v2:Change suggested by Alan "One Thousand Gnomes": - Move rs485 structure further down on the uart_8250_port structure drivers/tty/serial/8250/8250_core.c | 39 +++++++++++++++++++++++++++++++++++++ include/linux/serial_8250.h | 3 +++ 2 files changed, 42 insertions(+) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-08jsm: add support for additional Neo cardsBill Pemberton
Add device ids for additional Neo cards. The ids come from the dgnc driver. Signed-off-by: Bill Pemberton <wfp5p@worldbroken.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-08-27module: make it possible to have unsafe, tainting module paramsJani Nikula
Add flags field to struct kernel_params, and add the first flag: unsafe parameter. Modifying a kernel parameter with the unsafe flag set, either via the kernel command line or sysfs, will issue a warning and taint the kernel. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jean Delvare <khali@linux-fr.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Li Zhong <zhong@linux.vnet.ibm.com> Cc: Jon Mason <jon.mason@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-08-14Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds
Pull device tree updates from Grant Likely: "The branch contains the following device tree changes the v3.17 merge window: Group changes to the device tree. In preparation for adding device tree overlay support, OF_DYNAMIC is reworked so that a set of device tree changes can be prepared and applied to the tree all at once. OF_RECONFIG notifiers see the most significant change here so that users always get a consistent view of the tree. Notifiers generation is moved from before a change to after it, and notifiers for a group of changes are emitted after the entire block of changes have been applied Automatic console selection from DT. Console drivers can now use of_console_check() to see if the device node is specified as a console device. If so then it gets added as a preferred console. UART devices get this support automatically when uart_add_one_port() is called. DT unit tests no longer depend on pre-loaded data in the device tree. Data is loaded dynamically at the start of unit tests, and then unloaded again when the tests have completed. Also contains a few bugfixes for reserved regions and early memory setup" * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: (21 commits) of: Fixing OF Selftest build error drivers: of: add automated assignment of reserved regions to client devices of: Use proper types for checking memory overflow of: typo fix in __of_prop_dup() Adding selftest testdata dynamically into live tree of: Add todo tasklist for Devicetree of: Transactional DT support. of: Reorder device tree changes and notifiers of: Move dynamic node fixups out of powerpc and into common code of: Make sure attached nodes don't carry along extra children of: Make devicetree sysfs update functions consistent. of: Create unlocked versions of node and property add/remove functions OF: Utility helper functions for dynamic nodes of: Move CONFIG_OF_DYNAMIC code into a separate file of: rename of_aliases_mutex to just of_mutex of/platform: Fix of_platform_device_destroy iteration of devices of: Migrate of_find_node_by_name() users to for_each_node_by_name() tty: Update hypervisor tty drivers to use core stdout parsing code. arm/versatile: Add the uart as the stdout device. of: Enable console on serial ports specified by /chosen/stdout-path ...
2014-08-11Merge branch 'devicetree/next-console' into devicetree/nextGrant Likely
2014-08-08Merge branch 'akpm' (second patchbomb from Andrew Morton)Linus Torvalds
Merge more incoming from Andrew Morton: "Two new syscalls: memfd_create in "shm: add memfd_create() syscall" kexec_file_load in "kexec: implementation of new syscall kexec_file_load" And: - Most (all?) of the rest of MM - Lots of the usual misc bits - fs/autofs4 - drivers/rtc - fs/nilfs - procfs - fork.c, exec.c - more in lib/ - rapidio - Janitorial work in filesystems: fs/ufs, fs/reiserfs, fs/adfs, fs/cramfs, fs/romfs, fs/qnx6. - initrd/initramfs work - "file sealing" and the memfd_create() syscall, in tmpfs - add pci_zalloc_consistent, use it in lots of places - MAINTAINERS maintenance - kexec feature work" * emailed patches from Andrew Morton <akpm@linux-foundation.org: (193 commits) MAINTAINERS: update nomadik patterns MAINTAINERS: update usb/gadget patterns MAINTAINERS: update DMA BUFFER SHARING patterns kexec: verify the signature of signed PE bzImage kexec: support kexec/kdump on EFI systems kexec: support for kexec on panic using new system call kexec-bzImage64: support for loading bzImage using 64bit entry kexec: load and relocate purgatory at kernel load time purgatory: core purgatory functionality purgatory/sha256: provide implementation of sha256 in purgaotory context kexec: implementation of new syscall kexec_file_load kexec: new syscall kexec_file_load() declaration kexec: make kexec_segment user buffer pointer a union resource: provide new functions to walk through resources kexec: use common function for kimage_normal_alloc() and kimage_crash_alloc() kexec: move segment verification code in a separate function kexec: rename unusebale_pages to unusable_pages kernel: build bin2c based on config option CONFIG_BUILD_BIN2C bin2c: move bin2c in scripts/basic shm: wait for pins to be released when sealing ...
2014-08-08synclink_gt: use pci_zalloc_consistentJoe Perches
Remove the now unnecessary memset too. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-08Merge tag 'soc-for-3.17' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform changes from Olof Johansson: "This is the bulk of new SoC enablement and other platform changes for 3.17: - Samsung S5PV210 has been converted to DT and multiplatform - Clock drivers and bindings for some of the lower-end i.MX 1/2 platforms - Kirkwood, one of the popular Marvell platforms, is folded into the mvebu platform code, removing mach-kirkwood - Hwmod data for TI AM43xx and DRA7 platforms - More additions of Renesas shmobile platform support - Removal of plat-samsung contents that can be removed with S5PV210 being multiplatform/DT-enabled and the other two old platforms being removed New platforms (most with only basic support right now): - Hisilicon X5HD2 settop box chipset is introduced - Mediatek MT6589 (mobile chipset) is introduced - Broadcom BCM7xxx settop box chipset is introduced + as usual a lot other pieces all over the platform code" * tag 'soc-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (240 commits) ARM: hisi: remove smp from machine descriptor power: reset: move hisilicon reboot code ARM: dts: Add hix5hd2-dkb dts file. ARM: debug: Rename Hi3716 to HIX5HD2 ARM: hisi: enable hix5hd2 SoC ARM: hisi: add ARCH_HISI MAINTAINERS: add entry for Broadcom ARM STB architecture ARM: brcmstb: select GISB arbiter and interrupt drivers ARM: brcmstb: add infrastructure for ARM-based Broadcom STB SoCs ARM: configs: enable SMP in bcm_defconfig ARM: add SMP support for Broadcom mobile SoCs Documentation: arm: misc updates to Marvell EBU SoC status Documentation: arm: add URLs to public datasheets for the Marvell Armada XP SoC ARM: mvebu: fix build without platforms selected ARM: mvebu: add cpuidle support for Armada 38x ARM: mvebu: add cpuidle support for Armada 370 cpuidle: mvebu: add Armada 38x support cpuidle: mvebu: add Armada 370 support cpuidle: mvebu: rename the driver from armada-370-xp to mvebu-v7 ARM: mvebu: export the SCU address ...
2014-08-06mm, oom: ensure memoryless node zonelist always includes zonesDavid Rientjes
With memoryless node support being worked on, it's possible that for optimizations that a node may not have a non-NULL zonelist. When CONFIG_NUMA is enabled and node 0 is memoryless, this means the zonelist for first_online_node may become NULL. The oom killer requires a zonelist that includes all memory zones for the sysrq trigger and pagefault out of memory handler. Ensure that a non-NULL zonelist is always passed to the oom killer. [akpm@linux-foundation.org: fix non-numa build] Signed-off-by: David Rientjes <rientjes@google.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-nextLinus Torvalds
Pull sparc updates from David Miller: 1) Add sparc RAM output to /proc/iomem, from Bob Picco. 2) Allow seeks on /dev/mdesc, from Khalid Aziz. 3) Cleanup sparc64 I/O accessors, from Sam Ravnborg. 4) If update_mmu_cache{,_pmd}() is called with an not-valid mapping, do not insert it into the TLB miss hash tables otherwise we'll livelock. Based upon work by Christopher Alexander Tobias Schulze. 5) Fix BREAK detection in sunsab driver when no actual characters are pending, from Christopher Alexander Tobias Schulze. 6) Because we have modules --> openfirmware --> vmalloc ordering of virtual memory, the lazy VMAP TLB flusher can cons up an invocation of flush_tlb_kernel_range() that covers the openfirmware address range. Unfortunately this will flush out the firmware's locked TLB mapping which causes all kinds of trouble. Just split up the flush request if this happens, but in the long term the lazy VMAP flusher should probably be made a little bit smarter. Based upon work by Christopher Alexander Tobias Schulze. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next: sparc64: Fix up merge thinko. sparc: Add "install" target arch/sparc/math-emu/math_32.c: drop stray break operator sparc64: ldc_connect() should not return EINVAL when handshake is in progress. sparc64: Guard against flushing openfirmware mappings. sunsab: Fix detection of BREAK on sunsab serial console bbc-i2c: Fix BBC I2C envctrl on SunBlade 2000 sparc64: Do not insert non-valid PTEs into the TSB hash table. sparc64: avoid code duplication in io_64.h sparc64: reorder functions in io_64.h sparc64: drop unused SLOW_DOWN_IO definitions sparc64: remove macro indirection in io_64.h sparc64: update IO access functions in PeeCeeI sparcspkr: use sbus_*() primitives for IO sparc: Add support for seek and shorter read to /dev/mdesc sparc: use %s for unaligned panic drivers/sbus/char: Micro-optimization in display7seg.c display7seg: Introduce the use of the managed version of kzalloc sparc64 - add mem to iomem resource
2014-08-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
Pull networking updates from David Miller: "Highlights: 1) Steady transitioning of the BPF instructure to a generic spot so all kernel subsystems can make use of it, from Alexei Starovoitov. 2) SFC driver supports busy polling, from Alexandre Rames. 3) Take advantage of hash table in UDP multicast delivery, from David Held. 4) Lighten locking, in particular by getting rid of the LRU lists, in inet frag handling. From Florian Westphal. 5) Add support for various RFC6458 control messages in SCTP, from Geir Ola Vaagland. 6) Allow to filter bridge forwarding database dumps by device, from Jamal Hadi Salim. 7) virtio-net also now supports busy polling, from Jason Wang. 8) Some low level optimization tweaks in pktgen from Jesper Dangaard Brouer. 9) Add support for ipv6 address generation modes, so that userland can have some input into the process. From Jiri Pirko. 10) Consolidate common TCP connection request code in ipv4 and ipv6, from Octavian Purdila. 11) New ARP packet logger in netfilter, from Pablo Neira Ayuso. 12) Generic resizable RCU hash table, with intial users in netlink and nftables. From Thomas Graf. 13) Maintain a name assignment type so that userspace can see where a network device name came from (enumerated by kernel, assigned explicitly by userspace, etc.) From Tom Gundersen. 14) Automatic flow label generation on transmit in ipv6, from Tom Herbert. 15) New packet timestamping facilities from Willem de Bruijn, meant to assist in measuring latencies going into/out-of the packet scheduler, latency from TCP data transmission to ACK, etc" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits) cxgb4 : Disable recursive mailbox commands when enabling vi net: reduce USB network driver config options. tg3: Modify tg3_tso_bug() to handle multiple TX rings amd-xgbe: Perform phy connect/disconnect at dev open/stop amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask net: sun4i-emac: fix memory leak on bad packet sctp: fix possible seqlock seadlock in sctp_packet_transmit() Revert "net: phy: Set the driver when registering an MDIO bus device" cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine team: Simplify return path of team_newlink bridge: Update outdated comment on promiscuous mode net-timestamp: ACK timestamp for bytestreams net-timestamp: TCP timestamping net-timestamp: SCHED timestamp on entering packet scheduler net-timestamp: add key to disambiguate concurrent datagrams net-timestamp: move timestamp flags out of sk_flags net-timestamp: extend SCM_TIMESTAMPING ancillary data struct cxgb4i : Move stray CPL definitions to cxgb4 driver tcp: reduce spurious retransmits due to transient SACK reneging qlcnic: Initialize dcbnl_ops before register_netdev ...
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