The /proc/tty/ldiscs file is totally and utterly un-interested in the
"struct tty_ldisc" structures, and only cares about the underlying ldisc
operations.

So don't make it create a dummy 'struct ldisc' only to get a pointer to
the operations, and then destroy it.  Instead, we split up the function
'tty_ldisc_try_get()', and create a 'get_ldops()' helper that just looks
up the ldisc operations based on the ldisc number.

That makes the code simpler to read (smaller and more well-defined
helper functions), and allows the /proc functions to avoid creating that
useless dummy only to immediately free it again.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Tested-by: NSergey Senozhatsky <sergey.senozhatsky@mail.by>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add ID as reported in:

http://lists.infradead.org/pipermail/linux-pcmcia/2009-May/006127.htmlReported-by: NKenneth Moorman <KMoorman@transy.edu>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Since early printk only makes sense/works when the serial driver is built
into the kernel, disable the option for this driver when it is going to be
built as a module.  Otherwise we get build failures due to the ifdef
handling.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: stable <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The tty_operation chars_in_buffer() is not allowed to return a negative
value to signal an error.  Corrects the problem flagged by commit
23198fda, "tty: fix chars_in_buffers".
Signed-off-by: NTilman Schmidt <tilman@imap.cc>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: stable <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Commit ac89a917 ("pty: don't limit the writes to 'pty_space()' inside
'pty_write()'") removed the pty_space() checking, in order to let the
regular tty buffer code limit the buffering itself.

That was all good, but as a subtle side effect it meant that we'd be
doing a tty_wakeup() even in the case where the buffers were all filled
up, and didn't actually make any progress on the write.

Which sounds innocuous, but it interacts very badly with the ppp_async
code, which has an infinite loop in ppp_async_push() that tries to push
out data to the tty.  When we call tty_wakeup(), that loop ends up
thinking that progress was made (see the subtle interactions between
XMIT_WAKEUP and 'tty_stuffed' for details).  End result: one unhappy ppp
user.

Fixed by noticing when tty_insert_flip_string() didn't actually do
anything, and then not doing any more processing (including, very much
not calling tty_wakeup()).
Bisected-and-tested-by: NPeter Volkov <pva@gentoo.org>
Cc: stable@kernel.org (2.6.31)
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Use sizeof(*) instead of sizeof * (See Codingstyle documentation).
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Fix printk format warning:
drivers/watchdog/wdt_pci.c:652: warning: format '%04x' expects type 'unsigned int', but argument 2 has type 'resource_size_t'

and then use resource_size_t for the "io" variable as well
so that it won't be truncated.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Use pci_request_region instead of request_region for this pci_driver.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Fix error handling in the probe function.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Tested-by: NFlorian Fainelli <florian@openwrt.org>

This patch converts the ar7_wdt driver to become
a platform driver. The AR7 SoC specific identification
and base register calculation is performed by the board
code, therefore we no longer need to have access to
ar7_chip_id. We also remove the reboot notifier code to
use the platform shutdown method as Wim suggested.
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The WDIOC_SETTIMEOUT argument is supposed to be a "seconds" value.
However, the book E wdt currently treats it as a "period" which is
interpreted in a board-specific way.

This patch allows the user to pass in a "seconds" value and the driver
will set the smallest timeout that is at least as large as specified
by the user.  It's been tested on e500 hardware and works as
expected.

The patch only modifies the CONFIG_FSL_BOOKE case, the CONFIG_4xx case
is left unmodified as I don't have any hardware to test it on.
Signed-off-by: NChris Friesen <cfriesen@nortel.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Remove use of CLOCK_TICK_RATE in favor of using clock framework
for getting timer frequency.
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: NRussell King <linux@arm.linux.org.uk>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

I saw Julia Lawalls various commits fixing up the use of rounding
macros and since my already submitted patch was not caught in this
I took it upon myself to fix it up for this driver as well.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The WM831x series of devices provide a watchdog with configurable
behaviour on timer expiry.

Currently this driver support refreshes via a register or GPIO line and
autonomous refreshes from a hardware source (eg, a clock).
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add watchdog device driver for the Nuvoton NUC900 series SoCs.
Signed-off-by: NWan ZongShun <mcuos.com@gmail.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add support for watchdog found on SBC-FITPC2 board.
Signed-off-by: NDenis Turischev <denis@compulab.co.il>
Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

This is a new pata driver for ARTOP 867X 64bit 4-channel UDMA133 ATA ctrls.
Based on the Atp867 data sheet rev 1.2, Acard, and in part on early ide codes
from Eric Uhrhane <ericu@google.com>.
Signed-off-by: NJohn(Jung-Ik) Lee <jilee@google.com>
Reviewed-by: NGrant Grundler <grundler@google.com>
Reviewed-by: NGwendal Gringo <gwendal@google.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

On a Compaq Presario V3000 laptop (NVIDIA MCP51 chipset), pata_amd selects
PIO0 mode for the PATA DVD-RAM drive instead of MWDMA2 which it supports:

ata4.00: ATAPI: HL-DT-ST DVDRAM GSA-4084N, KQ09, max MWDMA2
ata4: nv_mode_filter: 0x39f&0x7001->0x1, BIOS=0x0 (0x0) ACPI=0x7001 (60:600:0x11)
ata4.00: configured for PIO0

For some reason, the BIOS-set UDMA configuration returns 0 and the ACPI _GTM
reports that UDMA2 and PIO0 are enabled. This causes nv_mode_filter to end up
allowing only PIO0 and UDMA0-2. Since the drive doesn't support UDMA we end up
using PIO0.

Since the controllers should always support PIO4, MWDMA2 and UDMA2 regardless
of what cable type is used, let's make sure we don't filter out these modes
regardless of what wacky settings the BIOS is using.
Signed-off-by: NRobert Hancock <hancockrwd@gmail.com>
Cc: stable@kernel.org
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

sata_promise's reset code has deviated quite a bit from
the Promise reference driver's, and it has been observed
to fail to recover from errors in some cases.

This patch thus updates the reset code to more closely
match the reference driver:

- soft reset (pdc_reset_port):
  * wait for ATA engine to not be in packet command mode
    (2nd gen only)
  * write reset bit in PDC_CTLSTAT before the first read
    in the loop
  * for 2nd gen SATA follow up with FPDMA reset and clearing
    error status registers
- hard reset (pdc_sata_hardreset):
  * wait for ATA engine to not be in packet command mode
    (2nd gen only)
  * reset ATA engine via the PCI control register
  * Tejun's change to use non-waiting hardreset + follow-up SRST

I'm not changing the hotplug mask bits since they are taken care
of by sata_promise's ->freeze() and ->thaw() operations. And I'm
not writing the PMP port # because that's always zero (for now).

Tested here on various controllers. In particular, one disk
which used to timeout and fail to recover from certain hdparm
and smartmonctl commands now works nicely.
Signed-off-by: NMikael Pettersson <mikpe@it.uu.se>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

1st generation Promise SATA chips are prone to generating spurious
hotplug events which can disrupt normal operation. This has been
observed on 20376 and 20378 chips. This patch thus disables hotplug
support on 1st gen chips while leaving it enabled for 2nd gen chips.

The pdc_sata_hotplug_offset() function becomes redundant so it is
removed.

Tested on 1st gen 20376 and 20378 mainboard chips and on a 2nd gen
SATA300 PCI card.
Signed-off-by: NMikael Pettersson <mikpe@it.uu.se>
Tested-by: NKurt Roeckx <kurt@roeckx.be>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Commit 54c38444 makes libata abort qcs
after the port is frozen.  This is necessary to guarantee that TF
registers are accessed after the DMA engine is shutdown after an
error.  However, this triggers WARN_ON_ONCE() check in
ata_qc_complete() spuriously.  Move WARN_ON_ONCE() downwards such that
failing commands while frozen doesn't trigger it.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: stable <stable@kernel.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Commit a5bfc471 dropped explicit
pci_intx() manipulation from ahci because it seemed unnecessary and
ahci doesn't seem to be the right place to be tweaking it if it were.
This was largely okay but there are exceptions.  There was one on an
embedded platform which was fixed via firmware and now bko#14124
reports it on a HP DL320.

  http://bugzilla.kernel.org/show_bug.cgi?id=14124

I still think this isn't something libata drivers should be caring
about (the only ones which are calling pci_intx() explicitly are
libata ones and one other driver) but for now reverting the change
seems to be the right thing to do.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NThomas Jarosch <thomas.jarosch@intra2net.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Signed-off-by: NMaxime Bizon <mbizon@freebox.fr>
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

If we reach the test just below the loop with a `timeout' value of 0,
this does not mean that the timeout caused the loop to end, but rather
the `smi_rd.s.pending', in the last iteration. If timeout caused the
loop to end, then `timeout' is -1, not 0.

Since this can occur only in the last iteration, it is not very likely
to be a problem. By changing the post- to prefix decrement we ensure
that a timeout of 0 does mean it timed out.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Acked-by: NDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

All cmds issued to BE after the creation of mccq must now use the mcc-q
(and not mbox) to avoid a hw issue that results in mbox poll timeout.
Signed-off-by: NSathya Perla <sathyap@serverengines.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

use the wrong API when free dma. So when map dma use a flag to
demostrate whether it is 'pci_map_single' or 'pci_map_page'. When free
the dma, check the flags to select the right APIs('pci_unmap_single'
or 'pci_unmap_page').

set the flags type to u16  instead of unsigned long  on David's comments.
Signed-off-by: NJie Yang <jie.yang@atheros.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This sets the number of voltages for the AB3100 regulators so that
they play well with the voltage listing functions and can be used
properly with the MMC regulator integration glue for example.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Instead of hand rolling our own variant.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

KEY_1 and KEY_2 definitions conflicts with include/linux/input.h
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This adds support for the regulators found in the AB3100
Mixed-Signal IC.

It further also defines platform data for the ST-Ericsson
U300 platform and extends the AB3100 MFD driver so that
platform/board data with regulation constraints and an init
function can be passed down all the way from the board to
the regulators.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This adds support for the RTC found inside the AB3100 Mixed Signal chip.
The symbols used for communicating with the chip is found in the
mfd/ab3100-core.c driver that also provides the platform device.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Acked-by: NAlessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

ab3100.h should include linux/workqueue.h for otp to build properly.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

When the sleep script is loaded before the wakeup script, there is a
chance that the system might go to sleep before the wakeup script
loading is completed. This will lead to a system that does not wakeup
and has been observed to cause non-booting boards.

Various options were considered to solve this problem, including
modification of the core twl4030 power code to be smart enough to
reorder the loading of the scripts. But it felt too over-engineered.

Hence this patch just warns the DPS script developer so that they may be
reordered in the board-code itself.
Signed-off-by: NAmit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).

Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.
Signed-off-by: NAmit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This adds the ability to read out OTP (One-Time Programmable)
registers in the AB3100 MFD ASIC. It's a simple sysfs file you
can cat to prompt. The OTP registers of the AB3100 are used to
store various device-unique information such as customer ID,
product flags and the 3GPP standard IMEI (International Mobile
Equipment Indentity) number.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This driver provides basic support for the voltage regulators
integrated into the Freescale MC13783 PMIC. It is currently
only possible to enable/disable outputs, not to actually
set the voltage.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This driver provides the core Freescale MC13783 support. It
registers the client platform_devices and provides access
to the A/D converter.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This will make the worker fire interrupt disable the AB3100 IRQ
without sync which resolves a race since the interrupt obviously
cannot wait for itself to complete while being handled.
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>