Commit graph

1908 commits

Author SHA1 Message Date
Linus Torvalds
3373c3ddb2 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  kgdboc,input: Fix regression with keyboard release key and early debugging
2010-12-14 14:35:04 -08:00
Jason Wessel
8863ada9c4 kgdboc,input: Fix regression with keyboard release key and early debugging
The commit 111c182340 (kgdboc: reset
input devices (keyboards) when exiting debugger) introduced a
regression in early debugging such that you get a kernel oops on
continue (with the go command) if you boot a kernel with:

    earlyprintk=vga ekgdboc=kbd kgdbwait

The restore kgdboc_restore_input() routine schedules work for the
purpose of sending key release events for any keys that were in the
depressed state prior to entering the kernel debugger.  A simple fix
to the crash is to not invoke the schedule_work() if the kernel
system_state is anything other than SYSTEM_RUNNING.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com>
2010-12-13 22:44:03 -06:00
Linus Torvalds
eed5ee1a3a Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  serial: mfd: adjust the baud rate setting
  TTY: open/hangup race fixup
  TTY: don't allow reopen when ldisc is changing
  NET: wan/x25, fix ldisc->open retval
  TTY: ldisc, fix open flag handling
  serial8250: Mark console as CON_ANYTIME
2010-12-02 12:58:16 -08:00
Feng Tang
a5880a9e5b serial: mfd: adjust the baud rate setting
Previous baud rate setting code only has been tested with 3.5M/9600/
115200/230400/460800 bps, and recently we got a 3M bps device to test,
which needs to modify current MUL register setting, and with this
patch 2.5M/2M/1.5M/1M/0.5M should also work as they just use a MUL
value scale down from 3M's.

Also got some reference register setting from silicon guys for
different baud rates, which tries to keep the pre-scalar register value
to 16.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-30 17:32:32 -08:00
Arnd Bergmann
451a3c24b0 BKL: remove extraneous #include <smp_lock.h>
The big kernel lock has been removed from all these files at some point,
leaving only the #include.

Remove this too as a cleanup.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-17 08:59:32 -08:00
Peter Zijlstra
a80c49dbb6 serial8250: Mark console as CON_ANYTIME
While trying to debug a cpu-hotplug issue I noticed printk() stopped
working once the cpu got marked offline, since the 8250 serial console
doesn't have any per-cpu resources the CON_ANYTIME bit is the safe and
documented way to make it work again.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-16 13:29:54 -08:00
Ingo Molnar
f8b372a11c Revert "8250: Fix tcsetattr to avoid ioctl(TIOCMIWAIT) hang"
This reverts commit 47d3904fe4.

Crashes any x86 serial console bootup:

  Console: colour VGA+ 80x25
  BUG: unable to handle kernel NULL pointer dereference at 0000000000000158
  IP: [<ffffffff811ebcb4>] serial8250_do_set_termios+0x1d4/0x430
  ...

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Greg KH <gregkh@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-13 09:59:19 -08:00
Linus Torvalds
edaa4d668b Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  n_gsm: Fix length handling
  n_gsm: Copy n2 over when configuring via ioctl interface
  serial: bfin_5xx: grab port lock before making port termios changes
  serial: bfin_5xx: disable CON_PRINTBUFFER for consoles
  serial: bfin_5xx: remove redundant SSYNC to improve TX speed
  serial: bfin_5xx: always include DMA headers
  vcs: make proper usage of the poll flags
  amiserial: Remove unused variable icount
  8250: Fix tcsetattr to avoid ioctl(TIOCMIWAIT) hang
  tty_ldisc: Fix BUG() on hangup
  TTY: restore tty_ldisc_wait_idle
  SERIAL: blacklist si3052 chip
  drivers/serial/bfin_5xx.c: Fix line continuation defects
  tty: prevent DOS in the flush_to_ldisc
  8250: add support for Kouwell KW-L221N-2
  nozomi: Fix warning from the previous TIOCGCOUNT changes
  tty: fix warning in synclink driver
  tty: Fix formatting in tty.h
  tty: the development tree is now done in git
2010-11-12 16:02:30 -08:00
Sonic Zhang
5bb06b62bc serial: bfin_5xx: grab port lock before making port termios changes
The port lock exists to protect these resources, so we need to grab it
before making changes.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-11 11:06:08 -08:00
Sonic Zhang
6d9e449868 serial: bfin_5xx: disable CON_PRINTBUFFER for consoles
If we are using early serial, don't let the normal console rewind
the log buffer, since that causes things to be printed multiple times.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-11 11:06:08 -08:00
Sonic Zhang
001a05d56e serial: bfin_5xx: remove redundant SSYNC to improve TX speed
We don't need to force a SSYNC here as the LSR register will already
be updated by the time we get back to reading it.  This speeds up TX
throughput and lowers general system overhead (since SSYNC is system
wide, not peripheral-specific).

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-11 11:06:08 -08:00
Sonic Zhang
b6100992e3 serial: bfin_5xx: always include DMA headers
On Blackfin systems, peripherals that have optional DMA support always
route their interrupts through the corresponding DMA channel -- even
when DMA is not being used.  So in PIO mode, we still need to request
the DMA channel (so interrupts are delivered) which means we need to
always include the DMA header for the DMA defines/functions.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-11 11:06:07 -08:00
Lawrence Rust
47d3904fe4 8250: Fix tcsetattr to avoid ioctl(TIOCMIWAIT) hang
Calling tcsetattr prevents any thread(s) currently suspended in ioctl
TIOCMIWAIT for the same device from ever resuming.

If a thread is suspended inside a call to ioctl TIOCMIWAIT, waiting for
a modem status change, then the 8250 driver enables modem status
interrupts (MSI).  The device interrupt service routine resumes the
suspended thread(s) on the next MSI.

If while the thread(s) are suspended, another thread calls tcsetattr
then the 8250 driver disables MSI (unless CTS/RTS handshaking is
enabled) thus preventing the suspended thread(s) from ever being
resumed.

This patch only disables MSI in tcsetattr handling if there are no
suspended threads.

Program to demonstrate bug & fix:

/* gcc miwait.c -o miwait -l pthread */
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <linux/serial.h>

static void* monitor( void* pv);
static int s_fd;

int main( void)
  {
  const char kszDev[] = "/dev/ttyS0";
  pthread_t t;
  struct termios tio;

  s_fd = open( kszDev, O_RDWR | O_NONBLOCK);
  if ( s_fd < 0)
    return fprintf( stderr, "Error(%d) opening %s: %s\n", errno, kszDev, strerror( errno)), 1;

  pthread_create( &t, NULL, &monitor, NULL);

  /* Modem status changes seen here */
  puts( "Main: awaiting status changes");
  sleep( 5);

  tcgetattr( s_fd, &tio);
  tio.c_cflag ^= CSTOPB;

  /* But not after here */
  puts( "Main: tcsetattr called");
  tcsetattr( s_fd, TCSANOW, &tio);

  for (;;)
    sleep( 1);
  }

static void* monitor( void* pv)
  {
  (void)pv;
  for(;;)
    {
    unsigned uModem;
    struct serial_icounter_struct cnt;

    if ( ioctl( s_fd, TIOCMGET, &uModem) < 0)
      fprintf( stderr, "Error(%d) in TIOCMGET: %s\n", errno, strerror( errno));
    printf( "Modem status:%s%s%s%s%s%s\n",
      (uModem & TIOCM_RTS) ? " RTS" : "",
      (uModem & TIOCM_DTR) ? " DTR" : "",
      (uModem & TIOCM_CTS) ? " CTS" : "",
      (uModem & TIOCM_DSR) ? " DSR" : "",
      (uModem & TIOCM_CD) ? " CD" : "",
      (uModem & TIOCM_RI) ? " RI" : ""
    );

    if ( ioctl( s_fd, TIOCGICOUNT, &cnt) < 0)
      fprintf( stderr, "Error(%d) in TIOCGICOUNT: %s\n", errno, strerror( errno));
    printf( "Irqs: CTS:%d DSR:%d RNG:%d DCD:%d Rx:%d Tx:%d Frame:%d Orun:%d Par:%d Brk:%d Oflow:%d\n",
      cnt.cts, cnt.dsr, cnt.rng, cnt.dcd,
      cnt.rx, cnt.tx, cnt.frame, cnt.overrun, cnt.parity,
      cnt.brk, cnt.buf_overrun
    );

    fputs( "Waiting...", stdout), fflush( stdout);
    if ( 0 > ioctl( s_fd, TIOCMIWAIT, (unsigned long)(TIOCM_CAR | TIOCM_RNG | TIOCM_DSR | TIOCM_CTS)))
      fprintf( stderr, "\nError(%d) in TIOCMIWAIT: %s\n", errno, strerror( errno));
    fputs( "\n", stdout);
    }
  return NULL;
  }

Signed-off by Lawrence Rust <lawrence@softsystem.co.uk>

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-11 10:51:35 -08:00
Maciej Szmigiero
ebf7c06635 SERIAL: blacklist si3052 chip
[SERIAL]blacklist si3052 chip

Si3052-based softmodems aren't serial ports so don't bind serial driver to them.
Allows proper driver to bind to them.

Signed-off-by: Maciej Szmigiero <mhej@o2.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-09 15:03:07 -08:00
Joe Perches
a89f2466a9 drivers/serial/bfin_5xx.c: Fix line continuation defects
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-09 15:03:06 -08:00
Mikulas Patocka
c9bd9d01db 8250: add support for Kouwell KW-L221N-2
Add support for Kouwell KW-L221N-2 card.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-09 14:58:06 -08:00
Dmitry Torokhov
111c182340 kgdboc: reset input devices (keyboards) when exiting debugger
Use the newly exported input_reset_device() call to reset LED state and
mark all keys/buttons as released on all keyboard-like devices when
exiting the debugger.

[jason.wessel@windriver.com: fix compile without keyboard input driver]
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-11-03 11:04:52 -07:00
Linus Torvalds
b3b2b6351a Merge branch 'for-linus' of git://www.jni.nu/cris
* 'for-linus' of git://www.jni.nu/cris:
  CRIS: Add paths for CRISv10 serial driver
  CRIS: Fix RS485 delay handling.
  Add missing "struct" to in sizeof.
2010-11-01 07:53:19 -04:00
Jesper Nilsson
c7213fc4ed CRIS: Fix RS485 delay handling.
Very recently, the RS485 interface has been fixed by adding two further
fields (see commit 1b6331848b).

Check the value of the flag SER_RS485_RTS_BEFORE_SEND before delaying.

Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2010-10-28 12:13:27 +02:00
Jesper Nilsson
94479c017b Add missing "struct" to in sizeof.
Lead to a compile error when the struct was no longer typedef'd.

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
2010-10-28 12:13:26 +02:00
Linus Torvalds
7b6181e068 Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (163 commits)
  omap: complete removal of machine_desc.io_pg_offst and .phys_io
  omap: UART: fix wakeup registers for OMAP24xx UART2
  omap: Fix spotty MMC voltages
  ASoC: OMAP4: MCPDM: Remove unnecessary include of plat/control.h
  serial: omap-serial: fix signess error
  OMAP3: DMA: Errata i541: sDMA FIFO draining does not finish
  omap: dma: Fix buffering disable bit setting for omap24xx
  omap: serial: Fix the boot-up crash/reboot without CONFIG_PM
  OMAP3: PM: fix scratchpad memory accesses for off-mode
  omap4: pandaboard: enable the ehci port on pandaboard
  omap4: pandaboard: Fix the init if CONFIG_MMC_OMAP_HS is not set
  omap4: pandaboard: remove unused hsmmc definition
  OMAP: McBSP: Remove null omap44xx ops comment
  OMAP: McBSP: Swap CLKS source definition
  OMAP: McBSP: Fix CLKR and FSR signal muxing
  OMAP2+: clock: reduce the amount of standard debugging while disabling unused clocks
  OMAP: control: move plat-omap/control.h to mach-omap2/control.h
  OMAP: split plat-omap/common.c
  OMAP: McBSP: implement functional clock switching via clock framework
  OMAP: McBSP: implement McBSP CLKR and FSR signal muxing via mach-omap2/mcbsp.c
  ...

Fixed up trivial conflicts in arch/arm/mach-omap2/
{board-zoom-peripherals.c,devices.c} as per Tony
2010-10-25 13:46:56 -07:00
Linus Torvalds
51f00a471c Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6:
  mtd/m25p80: add support to parse the partitions by OF node
  of/irq: of_irq.c needs to include linux/irq.h
  of/mips: Cleanup some include directives/files.
  of/mips: Add device tree support to MIPS
  of/flattree: Eliminate need to provide early_init_dt_scan_chosen_arch
  of/device: Rework to use common platform_device_alloc() for allocating devices
  of/xsysace: Fix OF probing on little-endian systems
  of: use __be32 types for big-endian device tree data
  of/irq: remove references to NO_IRQ in drivers/of/platform.c
  of/promtree: add package-to-path support to pdt
  of/promtree: add of_pdt namespace to pdt code
  of/promtree: no longer call prom_ functions directly; use an ops structure
  of/promtree: make drivers/of/pdt.c no longer sparc-only
  sparc: break out some PROM device-tree building code out into drivers/of
  of/sparc: convert various prom_* functions to use phandle
  sparc: stop exporting openprom.h header
  powerpc, of_serial: Endianness issues setting up the serial ports
  of: MTD: Fix OF probing on little-endian systems
  of: GPIO: Fix OF probing on little-endian systems
2010-10-25 08:19:14 -07:00
Linus Torvalds
1dfd166e93 Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (110 commits)
  sh: i2c-sh7760: Replase from ctrl_* to __raw_*
  sh: clkfwk: Shuffle around to match the intc split up.
  sh: clkfwk: modify for_each_frequency end condition
  sh: fix clk_get() error handling
  sh: clkfwk: Fix fault in frequency iterator.
  sh: clkfwk: Add a helper for rate rounding by divisor ranges.
  sh: clkfwk: Abstract rate rounding helper.
  sh: clkfwk: support clock remapping.
  sh: pci: Convert to upper/lower_32_bits() helpers.
  sh: mach-sdk7786: Add support for the FPGA SRAM.
  sh: Provide a generic SRAM pool for tiny memories.
  sh: pci: Support secondary FPGA-driven PCIe clocks on SDK7786.
  sh: pci: Support slot 4 routing on SDK7786.
  sh: Fix up PMB locking.
  sh: mach-sdk7786: Add support for fpga gpios.
  sh: use pr_fmt for clock framework, too.
  sh: remove name and id from struct clk
  sh: free-without-alloc fix for sh_mobile_lcdcfb
  sh: perf: Set up perf_max_events.
  sh: perf: Support SH-X3 hardware counters.
  ...

Fix up trivial conflicts (perf_max_events got removed) in arch/sh/kernel/perf_event.c
2010-10-25 07:51:49 -07:00
Linus Torvalds
4b37ba90f4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (21 commits)
  m68knommu: convert to using tracehook_report_syscall_*
  m68knommu: some boards use fixed phy for FEC ethernet
  m68knommu: support the external GPIO based interrupts of the 5272
  m68knommu: mask of vector bits in exception word properly
  m68knommu: change to new flag variables
  m68knommu: Fix MCFUART_TXFIFOSIZE for m548x.
  m68knommu: add basic mmu-less m548x support
  m68knommu: .gitignore vmlinux.lds
  m68knommu: stop using __do_IRQ
  m68knommu: rename PT_OFF_VECTOR to PT_OFF_FORMATVEC.
  m68knommu: add support for Coldfire 547x/548x interrupt controller
  m68k{nommu}: Remove unused DEFINE's from asm-offsets.c
  m68knommu: whitespace cleanup in 68328/entry.S
  m68knommu: Document supported chips in intc-2.c and intc-simr.c.
  m68knommu: fix strace support for 68328/68360
  m68knommu: fix default starting date
  arch/m68knommu: Removing dead 68328_SERIAL_UART2 config option
  arch/m68knommu: Removing dead RAM_{16,32}_MB config option
  arch/m68knommu: Removing dead M68KFPU_EMU config option
  arch/m68knommu: Removing dead RELOCATE config option
  ...
2010-10-25 07:44:27 -07:00
Linus Torvalds
229aebb873 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
  Update broken web addresses in arch directory.
  Update broken web addresses in the kernel.
  Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget
  Revert "Fix typo: configuation => configuration" partially
  ida: document IDA_BITMAP_LONGS calculation
  ext2: fix a typo on comment in ext2/inode.c
  drivers/scsi: Remove unnecessary casts of private_data
  drivers/s390: Remove unnecessary casts of private_data
  net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data
  drivers/infiniband: Remove unnecessary casts of private_data
  drivers/gpu/drm: Remove unnecessary casts of private_data
  kernel/pm_qos_params.c: Remove unnecessary casts of private_data
  fs/ecryptfs: Remove unnecessary casts of private_data
  fs/seq_file.c: Remove unnecessary casts of private_data
  arm: uengine.c: remove C99 comments
  arm: scoop.c: remove C99 comments
  Fix typo configue => configure in comments
  Fix typo: configuation => configuration
  Fix typo interrest[ing|ed] => interest[ing|ed]
  Fix various typos of valid in comments
  ...

Fix up trivial conflicts in:
	drivers/char/ipmi/ipmi_si_intf.c
	drivers/usb/gadget/rndis.c
	net/irda/irnet/irnet_ppp.c
2010-10-24 13:41:39 -07:00
Linus Torvalds
8814011679 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  kdb,debug_core: adjust master cpu switch logic against new debug_core locking
  debug_core: refactor locking for master/slave cpus
  x86,kgdb: remove unnecessary call to kgdb_correct_hw_break()
  debug_core: disable hw_breakpoints on all cores in kgdb_cpu_enter()
  kdb,kgdb: fix sparse fixups
  kdb: Fix oops in kdb_unregister
  kdb,ftdump: Remove reference to internal kdb include
  kdb: Allow kernel loadable modules to add kdb shell functions
  debug_core: stop rcu warnings on kernel resume
  debug_core: move all watch dog syncs to a single function
  x86,kgdb: fix debugger hw breakpoint test regression in 2.6.35
2010-10-22 20:35:12 -07:00
Linus Torvalds
73ecf3a6e3 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (49 commits)
  serial8250: ratelimit "too much work" error
  serial: bfin_sport_uart: speed up sport RX sample rate to be 3% faster
  serial: abstraction for 8250 legacy ports
  serial/imx: check that the buffer is non-empty before sending it out
  serial: mfd: add more baud rates support
  jsm: Remove the uart port on errors
  Alchemy: Add UART PM methods.
  8250: allow platforms to override PM hook.
  altera_uart: Don't use plain integer as NULL pointer
  altera_uart: Fix missing prototype for registering an early console
  altera_uart: Fixup type usage of port flags
  altera_uart: Make it possible to use Altera UART and 8250 ports together
  altera_uart: Add support for different address strides
  altera_uart: Add support for getting mapbase and IRQ from resources
  altera_uart: Add support for polling mode (IRQ-less)
  serial: Factor out uart_poll_timeout() from 8250 driver
  serial: mark the 8250 driver as maintained
  serial: 8250: Don't delay after transmitter is ready.
  tty: MAINTAINERS: add drivers/serial/jsm/ as maintained driver
  vcs: invoke the vt update callback when /dev/vcs* is written to
  ...
2010-10-22 19:59:04 -07:00
Jason Wessel
91b152aa85 kdb,kgdb: fix sparse fixups
Fix the following sparse warnings:

kdb_main.c:328:5: warning: symbol 'kdbgetu64arg' was not declared. Should it be static?
kgdboc.c:246:12: warning: symbol 'kgdboc_early_init' was not declared. Should it be static?
kgdb.c:652:26: warning: incorrect type in argument 1 (different address spaces)
kgdb.c:652:26:    expected void const *ptr
kgdb.c:652:26:    got struct perf_event *[noderef] <asn:3>*pev

The one in kgdb.c required the (void * __force) because of the return
code from register_wide_hw_breakpoint looking like:

        return (void __percpu __force *)ERR_PTR(err);

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-10-22 15:34:12 -05:00
Linus Torvalds
092e0e7e52 Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
* 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl:
  vfs: make no_llseek the default
  vfs: don't use BKL in default_llseek
  llseek: automatically add .llseek fop
  libfs: use generic_file_llseek for simple_attr
  mac80211: disallow seeks in minstrel debug code
  lirc: make chardev nonseekable
  viotape: use noop_llseek
  raw: use explicit llseek file operations
  ibmasmfs: use generic_file_llseek
  spufs: use llseek in all file operations
  arm/omap: use generic_file_llseek in iommu_debug
  lkdtm: use generic_file_llseek in debugfs
  net/wireless: use generic_file_llseek in debugfs
  drm: use noop_llseek
2010-10-22 10:52:56 -07:00
Daniel Drake
cd3ecad19a serial8250: ratelimit "too much work" error
Running a serial console, if too many kernel messages are generated within
a short time causing a lot of serial I/O, the 8250 driver will generate
another kernel message reporting this, which just adds to the I/O. It has
a cascading effect and quickly results the system being brought to its knees
by a flood of "too much work" messages.

Ratelimit the error message to avoid this.

[akpm@linux-foundation.org: use the superior printk_ratelimited()]
[akpm@linux-foundation.org: printk_ratelimited() needs ratelimit.h]
Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:11 -07:00
Sonic Zhang
0dd25df1a4 serial: bfin_sport_uart: speed up sport RX sample rate to be 3% faster
The actual uart baud rate of devices vary between +/-2% of what is
asked.  The SPORT RX sample rate should be faster than double of the
worst case.  Otherwise, wrong data may be received.  So set SPORT RX
clock to be 3% faster in general.

Reported-by: Olivier STOCK <ostockemer@ereca.fr>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:11 -07:00
Alan Cox
af7f374356 serial: abstraction for 8250 legacy ports
Not every platform that has generic legacy 8250 ports manages to have them
clocked the right way or without errata. Provide a generic interface to
allow platforms to override the default behaviour in a manner that dumps
the complexity in *their* code not the 8250 driver.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:10 -07:00
Volker Ernst
4e4e66029a serial/imx: check that the buffer is non-empty before sending it out
The .start_tx callback (imx_start_tx here) isn't only called when the
buffer is non-empty.  E.g. after resume or when handshaking is enabled
and the other side starts to signal being ready.

So check for an empty puffer already before sending the first character.
This prevents sending out stale (or uninitialised) data.

Signed-off-by: Volker Ernst <volker.ernst@txtr.com>
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Andy Green <andy@warmcat.com>
[ukl: reword commit log, put check in while condition]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:10 -07:00
Feng Tang
e5586eccc9 serial: mfd: add more baud rates support
Add more baud rates support referring the baud_table[] defined
in drivers/char/tty_ioctl.c: 3000000/2000000/1000000/500000

Signed-off-by: Feng Tang <feng.tang@intel.com>
Acked-by: Alan Cox <alan.cox@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:10 -07:00
Breno Leitao
abf4f6a514 jsm: Remove the uart port on errors
If kzmalloc fails, the uart port is not removed causing a leak.
This patch just add another label that removes the uart when the
kzmalloc fails.

Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:10 -07:00
Manuel Lauss
c161afe975 8250: allow platforms to override PM hook.
Add a hook for platforms to specify custom pm methods.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:09 -07:00
Anton Vorontsov
70eebd0b60 altera_uart: Don't use plain integer as NULL pointer
Fixes sparse warning.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: Alan Cox <alan@linux.intel.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
2010-10-22 10:20:09 -07:00
Anton Vorontsov
288e9feb51 altera_uart: Fixup type usage of port flags
port->flags is of type upf_t, which corresponds to UPF_* flags.

ASYNC_BOOT_AUTOCONF is an unsigned integer, which happen to
be the same as UPF_BOOT_AUTOCONF.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:08 -07:00
Anton Vorontsov
99793c660c altera_uart: Make it possible to use Altera UART and 8250 ports together
This fixes tty name, major and minor numbers. The major number
204 is used across many platform-specific serial drivers, so we
use that.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:08 -07:00
Anton Vorontsov
0d426eda7c altera_uart: Add support for different address strides
Some controllers implement registers with a stride, to support
those we must implement the proper IO accessors.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:07 -07:00
Anton Vorontsov
6b5756f176 altera_uart: Add support for getting mapbase and IRQ from resources
This makes it much easier to integrate the driver with the rest of
the Linux (e.g. MFD subsystem).

The old method is still supported though.

Also, from now on, there is one platform device per port (no
changes are needed for the platform code, as no one registers
the devices anywhere in-tree yet).

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Alan Cox <alan@linux.intel.com>,
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:07 -07:00
Anton Vorontsov
2f8b9c15cd altera_uart: Add support for polling mode (IRQ-less)
Some Altera UART implementations doesn't route the IRQ line, so we have
to work in polling mode.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:07 -07:00
Anton Vorontsov
54381067ed serial: Factor out uart_poll_timeout() from 8250 driver
Soon we will use that handy function in the altera_uart driver.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:07 -07:00
David Daney
97d303b765 serial: 8250: Don't delay after transmitter is ready.
The loop in wait_for_xmitr() is delaying one extra uS after the ready
condition has been met.  Rewrite the loop to only delay if the
transmitter is not ready.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:06 -07:00
Alan Cox
0587102cf9 tty: icount changeover for other main devices
Again basically cut and paste

Convert the main driver set to use the hooks for GICOUNT

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:05 -07:00
Alan Cox
d281da7ff6 tty: Make tiocgicount a handler
Dan Rosenberg noted that various drivers return the struct with uncleared
fields. Instead of spending forever trying to stomp all the drivers that
get it wrong (and every new driver) do the job in one place.

This first patch adds the needed operations and hooks them up, including
the needed USB midlayer and serial core plumbing.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:04 -07:00
Davidlohr Bueso
68707539df serial: max3107: Fix memory leaks when returning on error
Fix memory leaks in max3107_probe() when returning on error.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:03 -07:00
Alan Cox
91efa75ce1 serial: mrst_max3110: Make the IRQ option runtime
And while we are at it allow it to fail to find one. Without this the IRQ
option will cause the 3110 driver to fail on 0.7 SFI firmware.

Acked-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:03 -07:00
Feng Tang
ee9b4500eb serial: mrst_max3110: some code cleanup
The cleanup for mrst_max3110 includes:
* remove unneeded head files
* make the spi_transfer dma safe, so that driver is more portable
* add more check for error return value
* use mutex_trylock for read thread

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:03 -07:00
Jason Wang
891b9dd107 serial-core: restore termios settings when resume console ports
The commit 4547be7 rewrites suspend and resume functions. According
to this rewrite, when a serial port is a printk console device and
can suspend(without set no_console_suspend flag), it will definitely
call set_termios function during its resume, but parameter termios
isn't initialized, this will pass an unpredictable config to the
serial port. If this serial port is not a userspace opened tty device
, a suspend and resume action will make this serial port unusable.
I.E. ttyS0 is a printk console device, ttyS1 or keyboard+display is
userspace tty device, a suspend/resume action will make ttyS0
unusable.

If a serial port is both a printk console device and an opened tty
device, this issue can be overcome because it will call set_termios
again with the correct parameter in the uart_change_speed function.

Refer to the deleted content of commit 4547be7, revert parts relate
to restore settings into parameter termios. It is safe because if
a serial port is a printk console only device, the only meaningful
field in termios is c_cflag and its old config is saved in
uport->cons->cflag, if this port is also an opened tty device,
it will clear uport->cons->cflag in the uart_open and the old config
is saved in tty->termios.

Signed-off-by: Jason Wang <jason77.wang@gmail.com>
Acked-by: Stanislav Brabec <sbrabec@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-22 10:20:02 -07:00