MAINTAINERS: update GPIO maintainers entry

Add Alexandre Courbot as co-maintainer of the GPIO subsystem.
Provide a pointer to the GPIO GIT tree. Update the documentation
file path. Move around to put people and git tree on top.

Acked-by: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
sh-pfc: Fix PINMUX_GPIO macro

Commit 7cbb0e55e27e ("sh-pfc: Don't duplicate argument to PINMUX_GPIO
macro") erronesouly modified the PINMUX_GPIO macro in a way that
resulted in all pins being named "name". Fix the macro to name the pins
correctly.

Cc: stable@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
gpio: twl4030: Fix regression for twl gpio LED output

Commit 0b2aa8be introduced a regression that causes failure
in setting LED GPO direction to OUT.

This causes USB host probe failures for Beagleboard C4.

platform usb_phy_gen_xceiv.2: Driver usb_phy_gen_xceiv requests probe deferral
hsusb2_vcc: Failed to request enable GPIO510: -22
reg-fixed-voltage reg-fixed-voltage.0.auto: Failed to register regulator: -22
reg-fixed-voltage: probe of reg-fixed-voltage.0.auto failed with error -22

direction_out/direction_in must return 0 if the operation succeeded.

Also, don't update direction flag and output data if twl4030_set_gpio_direction()
failed inside twl_direction_out();

Cc: stable@vger.kernel.org
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
gpio: msm: Fix irq mask/unmask by writing bits instead of numbers

We should be writing bits here but instead we're writing the
numbers that correspond to the bits we want to write. Fix it by
wrapping the numbers in the BIT() macro. This fixes gpios acting
as interrupts.

Cc: stable@vger.kernel.org
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
gpio: rcar: Fix level interrupt handling

According to the manual, if a port is set for level detection using
the corresponding bit in the edge/level select register and an external
level interrupt signal is asserted, the corresponding bit in INTDT
does not use the FF to hold the input.
Thus, writing 1 to the corresponding bits in INTCLR cannot clear the
corresponding bits in the INTDT register. Instead, when an external
input signal is stopped, the corresponding bit in INTDT is cleared
automatically.

Since the INTDT bit cannot be cleared for the level interrupts until
the interrupt signal is stopped, we end up with the infinite loop
when using deferred (threaded) IRQ handling.

Since a deferred interrupt is disabled by the low-level handler and
re-enabled only when the deferred handler is completed, Fix the issue
by dropping disabled interrupts from the pending mask as suggested by
Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Changes in V2:
* Drop disabled interrupts from pending mask altogether instead of
  dropping level interrupts one by one once they get handled.

Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
powerpc: PTRACE_PEEKUSR always returns FPR0

There is a bug in using ptrace to access FPRs via PTRACE_PEEKUSR /
PTRACE_POKEUSR. In effect, trying to access any of the FPRs always
really accesses FPR0, which does seriously break debugging :-)

The problem seems to have been introduced by commit 3ad26e5c4459d
(Merge branch 'for-kvm' into next).

[ It is indeed a merge conflict between Paul's FPU/VSX state rework
and my LE patches - Anton ]

Signed-off-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Fix endian issue in setup-common.c

During on LE boot we see:

    Partition configured for 1073741824 cpus, operating system maximum is 2048.

Clearly missing a byteswap here.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Fix topology core_id endian issue on LE builds

cpu_to_core_id() is missing a byteswap:

cat /sys/devices/system/cpu/cpu63/topology/core_id
201326592

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/pseries: Fix endian issues in /proc/ppc64/lparcfg

Some obvious issues:

cat /proc/ppc64/lparcfg
...
partition_id=16777216
...
partition_potential_processors=268435456

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/pseries: Fix endian issues in nvram code

The NVRAM code has a number of endian issues. I noticed a very
confused error log count:

RTAS: 100663330 -------- RTAS event begin --------

100663330 == 0x06000022. 0x6 LE error logs and 0x22 BE error logs.

The pstore code has similar issues - if we write an oops in one
endian and attempt to read it in another we get junk.

Make both of these formats big endian, and byteswap as required.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/pseries: Fix PCIE link speed endian issue

We need to byteswap ibm,pcie-link-speed-stats.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/pseries: Fix endian issues in MSI code

The MSI code is miscalculating quotas in little endian mode.
Add required byteswaps to fix this.

Before we claimed a quota of 65536, after the patch we
see the correct value of 256.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Fix endian issues in crash dump code

A couple more device tree properties that need byte swapping.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/powernv: Fix endian issue in opal_xscom_read

opal_xscom_read uses a pointer to return the data so we need
to byteswap it on LE builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/powernv: Fix OPAL LPC access in Little Endian

We are passing pointers to the firmware for reads, we need to properly
convert the result as OPAL is always BE.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
ceph: initialize inode before instantiating dentry

commit b18825a7c8 (Put a small type field into struct dentry::d_flags)
put a type field into struct dentry::d_flags. __d_instantiate() set the
field by checking inode->i_mode. So we should initialize inode before
instantiating dentry when handling mds reply.

Fixes: http://tracker.ceph.com/issues/6930
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
ceph: Avoid data inconsistency due to d-cache aliasing in readpage()

If the length of data to be read in readpage() is exactly
PAGE_CACHE_SIZE, the original code does not flush d-cache
for data consistency after finishing reading. This patches fixes
this.

Signed-off-by: Li Wang <liwang@ubuntukylin.com>
Signed-off-by: Sage Weil <sage@inktank.com>
cpupower: Fix segfault due to incorrect getopt_long arugments

If a user calls 'cpupower set --perf-bias 15', the process will end with
a SIGSEGV in libc because cpupower-set passes a NULL optarg to the atoi
call.  This is because the getopt_long structure currently has all of
the options as having an optional_argument when they really have a
required argument.  We change the structure to use required_argument to
match the short options and it resolves the issue.

This fixes https://bugzilla.redhat.com/show_bug.cgi?id=1000439

Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Thomas Renninger <trenn@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

Pull powerpc fixes from Ben Herrenschmidt:
 "Uli's patch fixes a regression in ptrace caused by a mis-merge of a
  previous LE patch.  The rest are all more endian fixes, all fairly
  trivial, found during testing of 3.13-rc's"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/powernv: Fix OPAL LPC access in Little Endian
  powerpc/powernv: Fix endian issue in opal_xscom_read
  powerpc: Fix endian issues in crash dump code
  powerpc/pseries: Fix endian issues in MSI code
  powerpc/pseries: Fix PCIE link speed endian issue
  powerpc/pseries: Fix endian issues in nvram code
  powerpc/pseries: Fix endian issues in /proc/ppc64/lparcfg
  powerpc: Fix topology core_id endian issue on LE builds
  powerpc: Fix endian issue in setup-common.c
  powerpc: PTRACE_PEEKUSR always returns FPR0
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

Pull two Ceph fixes from Sage Weil:
 "One of these is fixing a regression from the d_flags file type patch
  that went into -rc1 that broke instantiation of inodes and dentries
  (we were doing dentries first).  The other is just an off-by-one
  corner case"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: Avoid data inconsistency due to d-cache aliasing in readpage()
  ceph: initialize inode before instantiating dentry