Commit graph

339101 commits

Author SHA1 Message Date
Florian Fainelli
55220bb3e5 Input: matrix-keymap - provide proper module license
The matrix-keymap module is currently lacking a proper module license,
add one so we don't have this module tainting the entire kernel.  This
issue has been present since commit 1932811f42 ("Input: matrix-keymap
- uninline and prepare for device tree support")

Signed-off-by: Florian Fainelli <florian@openwrt.org>
CC: stable@vger.kernel.org # v3.5+
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-10 16:10:05 -08:00
Linus Torvalds
2c68bc72dc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Netlink socket dumping had several missing verifications and checks.

    In particular, address comparisons in the request byte code
    interpreter could access past the end of the address in the
    inet_request_sock.

    Also, address family and address prefix lengths were not validated
    properly at all.

    This means arbitrary applications can read past the end of certain
    kernel data structures.

    Fixes from Neal Cardwell.

 2) ip_check_defrag() operates in contexts where we're in the process
    of, or about to, input the packet into the real protocols
    (specifically macvlan and AF_PACKET snooping).

    Unfortunately, it does a pskb_may_pull() which can modify the
    backing packet data which is not legal if the SKB is shared.  It
    very much can be shared in this context.

    Deal with the possibility that the SKB is segmented by using
    skb_copy_bits().

    Fix from Johannes Berg based upon a report by Eric Leblond.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  ipv4: ip_check_defrag must not modify skb before unsharing
  inet_diag: validate port comparison byte code to prevent unsafe reads
  inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
  inet_diag: validate byte code to prevent oops in inet_diag_bc_run()
  inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
2012-12-10 16:07:11 -08:00
Kumar, Anil
fed16bba87 mtd: nand: davinci: fix the binding documentation
Since the aemif driver conversion to DT along with
its movement to drivers/ folder is not yet done,
fix NAND binding documentation to have NAND specific
DT details only.

Signed-off-by: Kumar, Anil <anilkumar.v@ti.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-10 23:00:07 +00:00
Gregory CLEMENT
0c955b392a rtc: rtc-mv: Add the device tree binding documentation
The support was already written, but the binding documentation was
lacking.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-10 21:49:14 +00:00
Rafael J. Wysocki
f316fc5655 Merge branch 'acpi-enumeration'
* acpi-enumeration:
  mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6
2012-12-10 21:19:24 +01:00
Adrian Hunter
e557139717 mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6
sdhci-acpi supports ACPI devices which have compatibility ID
PNP0D40, however it is not possible to know if those devices
will all work correctly with runtime-pm, so that must be configured
per hardware ID.

For INT33C6, several related quirks, capabilities and flags are set:

	MMC_CAP_NONREMOVABLE
		The SDIO card will never be removable

	SDHCI_ACPI_RUNTIME_PM
		Enable runtime-pm of the host controller

	MMC_CAP_POWER_OFF_CARD
		Enable runtime-pm of the SDIO card

	MMC_PM_KEEP_POWER
		SDIO card has the capability to remain powered up
		during system suspend

	SDHCI_QUIRK2_HOST_OFF_CARD_ON
		Always do a full reset during system resume
		because the card may be already initialized having
		not been powered off.

Wake-ups from the INT33C6 host controller are not supported, so the
following capability must *not* be set:

	MMC_PM_WAKE_SDIO_IRQ
		Enable wake on card interrupt

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-12-10 21:18:48 +01:00
Linus Torvalds
caf491916b Revert "revert "Revert "mm: remove __GFP_NO_KSWAPD""" and associated damage
This reverts commits a50915394f and
d7c3b937bd.

This is a revert of a revert of a revert.  In addition, it reverts the
even older i915 change to stop using the __GFP_NO_KSWAPD flag due to the
original commits in linux-next.

It turns out that the original patch really was bogus, and that the
original revert was the correct thing to do after all.  We thought we
had fixed the problem, and then reverted the revert, but the problem
really is fundamental: waking up kswapd simply isn't the right thing to
do, and direct reclaim sometimes simply _is_ the right thing to do.

When certain allocations fail, we simply should try some direct reclaim,
and if that fails, fail the allocation.  That's the right thing to do
for THP allocations, which can easily fail, and the GPU allocations want
to do that too.

So starting kswapd is sometimes simply wrong, and removing the flag that
said "don't start kswapd" was a mistake.  Let's hope we never revisit
this mistake again - and certainly not this many times ;)

Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-10 11:03:05 -08:00
Johannes Berg
1bf3751ec9 ipv4: ip_check_defrag must not modify skb before unsharing
ip_check_defrag() might be called from af_packet within the
RX path where shared SKBs are used, so it must not modify
the input SKB before it has unshared it for defragmentation.
Use skb_copy_bits() to get the IP header and only pull in
everything later.

The same is true for the other caller in macvlan as it is
called from dev->rx_handler which can also get a shared SKB.

Reported-by: Eric Leblond <eric@regit.org>
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-10 13:51:44 -05:00
Linus Torvalds
31f8d42d44 Revert "mm: avoid waking kswapd for THP allocations when compaction is deferred or contended"
This reverts commit 782fd30406.

We are going to reinstate the __GFP_NO_KSWAPD flag that has been
removed, the removal reverted, and then removed again.  Making this
commit a pointless fixup for a problem that was caused by the removal of
__GFP_NO_KSWAPD flag.

The thing is, we really don't want to wake up kswapd for THP allocations
(because they fail quite commonly under any kind of memory pressure,
including when there is tons of memory free), and these patches were
just trying to fix up the underlying bug: the original removal of
__GFP_NO_KSWAPD in commit c654345924 ("mm: remove __GFP_NO_KSWAPD")
was simply bogus.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-10 10:47:45 -08:00
Lee Jones
fc13d5a5b1 gpio: Provide the STMPE GPIO driver with its own IRQ Domain
The STMPE GPIO driver can be used as an IRQ controller by some
related devices. Here we provide it with its very own IRQ Domain
so that IRQs can be issued dynamically. This will stand the
driver in good stead when it is enabled for Device Tree, as this
it a prerequisite.

Cc: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-12-10 11:23:30 +01:00
Vivien Didelot
759f5f3752 gpio: add TS-5500 DIO blocks support
Technologic Systems TS-5500 provides digital I/O lines exposed through
pin blocks. On this platform, there are three of them, named DIO1, DIO2
and LCD port, that may be used as a DIO block.

The TS-5500 pin blocks are described in the product's wiki:
http://wiki.embeddedarm.com/wiki/TS-5500#Digital_I.2FO

This driver is not limited to the TS-5500 blocks. It can be extended to
support similar boards pin blocks, such as on the TS-5600.

This patch is the V2 of the previous https://lkml.org/lkml/2012/9/25/671
with corrections suggested by Linus Walleij.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-12-10 11:23:25 +01:00
Neal Cardwell
5e1f54201c inet_diag: validate port comparison byte code to prevent unsafe reads
Add logic to verify that a port comparison byte code operation
actually has the second inet_diag_bc_op from which we read the port
for such operations.

Previously the code blindly referenced op[1] without first checking
whether a second inet_diag_bc_op struct could fit there. So a
malicious user could make the kernel read 4 bytes beyond the end of
the bytecode array by claiming to have a whole port comparison byte
code (2 inet_diag_bc_op structs) when in fact the bytecode was not
long enough to hold both.

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-09 19:00:48 -05:00
Neal Cardwell
f67caec906 inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
Add logic to check the address family of the user-supplied conditional
and the address family of the connection entry. We now do not do
prefix matching of addresses from different address families (AF_INET
vs AF_INET6), except for the previously existing support for having an
IPv4 prefix match an IPv4-mapped IPv6 address (which this commit
maintains as-is).

This change is needed for two reasons:

(1) The addresses are different lengths, so comparing a 128-bit IPv6
prefix match condition to a 32-bit IPv4 connection address can cause
us to unwittingly walk off the end of the IPv4 address and read
garbage or oops.

(2) The IPv4 and IPv6 address spaces are semantically distinct, so a
simple bit-wise comparison of the prefixes is not meaningful, and
would lead to bogus results (except for the IPv4-mapped IPv6 case,
which this commit maintains).

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-09 18:59:37 -05:00
Neal Cardwell
405c005949 inet_diag: validate byte code to prevent oops in inet_diag_bc_run()
Add logic to validate INET_DIAG_BC_S_COND and INET_DIAG_BC_D_COND
operations.

Previously we did not validate the inet_diag_hostcond, address family,
address length, and prefix length. So a malicious user could make the
kernel read beyond the end of the bytecode array by claiming to have a
whole inet_diag_hostcond when the bytecode was not long enough to
contain a whole inet_diag_hostcond of the given address family. Or
they could make the kernel read up to about 27 bytes beyond the end of
a connection address by passing a prefix length that exceeded the
length of addresses of the given family.

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-09 18:59:37 -05:00
Neal Cardwell
1c95df85ca inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
Fix inet_diag to be aware of the fact that AF_INET6 TCP connections
instantiated for IPv4 traffic and in the SYN-RECV state were actually
created with inet_reqsk_alloc(), instead of inet6_reqsk_alloc(). This
means that for such connections inet6_rsk(req) returns a pointer to a
random spot in memory up to roughly 64KB beyond the end of the
request_sock.

With this bug, for a server using AF_INET6 TCP sockets and serving
IPv4 traffic, an inet_diag user like `ss state SYN-RECV` would lead to
inet_diag_fill_req() causing an oops or the export to user space of 16
bytes of kernel memory as a garbage IPv6 address, depending on where
the garbage inet6_rsk(req) pointed.

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-09 18:59:37 -05:00
Johannes Weiner
ed23ec4f0a mm: vmscan: fix inappropriate zone congestion clearing
commit c702418f8a ("mm: vmscan: do not keep kswapd looping forever due
to individual uncompactable zones") removed zone watermark checks from
the compaction code in kswapd but left in the zone congestion clearing,
which now happens unconditionally on higher order reclaim.

This messes up the reclaim throttling logic for zones with
dirty/writeback pages, where zones should only lose their congestion
status when their watermarks have been restored.

Remove the clearing from the zone compaction section entirely.  The
preliminary zone check and the reclaim loop in kswapd will clear it if
the zone is considered balanced.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-08 08:41:18 -08:00
Linus Torvalds
684c9aaebb vfs: fix O_DIRECT read past end of block device
The direct-IO write path already had the i_size checks in mm/filemap.c,
but it turns out the read path did not, and removing the block size
checks in fs/block_dev.c (commit bbec0270bd: "blkdev_max_block: make
private to fs/buffer.c") removed the magic "shrink IO to past the end of
the device" code there.

Fix it by truncating the IO to the size of the block device, like the
write path already does.

NOTE! I suspect the write path would be *much* better off doing it this
way in fs/block_dev.c, rather than hidden deep in mm/filemap.c.  The
mm/filemap.c code is extremely hard to follow, and has various
conditionals on the target being a block device (ie the flag passed in
to 'generic_write_checks()', along with a conditional update of the
inode timestamp etc).

It is also quite possible that we should treat this whole block device
size as a "s_maxbytes" issue, and try to make the logic even more
generic.  However, in the meantime this is the fairly minimal targeted
fix.

Noted by Milan Broz thanks to a regression test for the cryptsetup
reencrypt tool.

Reported-and-tested-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-08 08:28:26 -08:00
Ingo Molnar
cc1b39dbf9 Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
Pull ftrace updates from Steve Rostedt.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:54:35 +01:00
Ingo Molnar
7e0dd574cd Merge branch 'uprobes/core' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc into perf/core
Pull uprobes fixes, cleanups and preparation for the ARM port from Oleg Nesterov.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:51:10 +01:00
Ingo Molnar
38130ec087 Some more cputime cleanups:
* Get rid of underscores polluting the vtime namespace
 
 * Consolidate context switch and tick handling
 
 * Improve debuggability by detecting irq unsafe callers
 
 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJQq52nAAoJEIUkVEdQjox3ZRoP/RuDC59hNGu3rR0ERMM3TqW3
 SIaMSHlHQh3h8P8OASpRqBb9s0BoWD0l3xZ68TEACnRdLS50Rre2P0SSxqpkdbnL
 cj0+I7gmbxKa9c9zpm+mn1TvL2bEhg6hkWCMK9jn2SSBl33cOqKUGUfy8Gx0nryc
 q+cOZrXSgMvYKCixGubCqsTl8MKs9CrpyrLSYtFUiHFVWREPfndS9M9BB5yfKHL1
 t9qmdb5WRq2NpU6apoZBMBdPQcmQr5WswLpbhoTocpvCiEmt5RZGkSDOawPa1DHP
 2SPM7fGZIDrXCMW/g9d2mt43j/HxS9LYu9lToZCbbMqehe2Bf5jYqO1Kwi7FhedR
 NSofoXbW/j589+7I+pN66lo0pctNWxd59YDvLw22SqUFcBEUSmypM6eUwbrbVUg7
 /H0a8T/5bPwx2ukNrCW0+Zsd9X3If4K290j4lNOMLki9ikYG6IXfGw1GMwsiyFSo
 LNSnDs0ekovvWOAg1iRq8DW8j/TWoZuZUSRME2LdCde9SbkMEGgWaNYCwNLMenie
 6jZHar7SfpdRDPP6NCY85jMy5MRbyN3mzSFhMfqMKQgmFNd7ay7oRKppIkwT+qkD
 VozCvdPmCxd+orNMbWINDAhNY5RUlcPj/Em8Mue1U152rpjfNt/WZOfmujmLwNW2
 /RPQtHo+F7w7KhbylFpx
 =cL3t
 -----END PGP SIGNATURE-----

Merge tag 'sched-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core

Pull more cputime cleanups from Frederic Weisbecker:

 * Get rid of underscores polluting the vtime namespace

 * Consolidate context switch and tick handling

 * Improve debuggability by detecting irq unsafe callers

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:44:43 +01:00
Ingo Molnar
08cd2a6960 Merge branch 'tip/perf/urgent-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent
Pull ftrace fixes from Steve Rostedt.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:42:47 +01:00
Ingo Molnar
e783377e93 Cputime cleanups on reader side:
* Improve naming and code location
 
 * Consolidate adjustment code
 
 * Comment the adjustement code
 
 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJQt5oaAAoJEIUkVEdQjox3hNwP/2QP7p9BHCPwGWenIi4aVUWH
 tlDLwWvQE919YPYL4AUgz4b9f4G7U7dbBozIJRxhB0rjqrbXU6PDvVCIwVyDH2xQ
 mTp5qdqyysgzqgZ7q0t27zLfHEANRcH8Tnrqj2XustqvdYcIzZKZeNkFsF3QRiDw
 utIEmE8A9mBnWDP7O4fDmo8onHNUmJc50Y0c/WJW7fbtq5aCh2vn87efV4GYGNjk
 e1qZuLRWdZYXkDnO6zqD5tUe/kB0ioPzXXyBkYAHXCMhCpkMDu7c18N+IrY80kBb
 vBQqeAGlpUuXnJ/MDFazqqbmezBYhnTIbnojyWO4ONzi2z6L3K9F1/zukM4WtvLv
 RNDF4MS7smFjyXXXfliIGOhvI5C5O9bosPOzBtvwHSYrnS5KGL8fv8N8tXixqytW
 nX5NEcjfCZXpNpm4TELcDyAvOrVMFe2CQwKgLBPSY1zRch34nJi9G55uKKSjg1xd
 Z1aDbVZFNt9R3ozV1rVaptNzagEa/023bvmnB8IiuA9oh6rNZOHhsc/lo1T2VaeO
 PhJqD50JPbJyycJ1m0pIW8iVSUxfIvJtICEHgVSCPH5A58PsKFr+8ELs+InTPTDt
 11V7dxHAmspar1CO1mqYMMIS4VKgPfwNI6zuaO+JlmU4nMB42y8WAZn/lzMyafQE
 Uswa6UTBBiU159HNzgDh
 =FRxY
 -----END PGP SIGNATURE-----

Merge tag 'cputime-adjustment-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core

Pull cputime cleanups from Frederic Weisbecker:

 * Improve naming and code location

 * Consolidate adjustment code

 * Comment the adjustement code

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:31:07 +01:00
Ingo Molnar
f0b9abfb04 Merge branch 'linus' into perf/core
Conflicts:
	tools/perf/Makefile
	tools/perf/builtin-test.c
	tools/perf/perf.h
	tools/perf/tests/parse-events.c
	tools/perf/util/evsel.h

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:25:06 +01:00
Ingo Molnar
adc1ef1e37 perf/core improvements and fixes
. UAPI fixes, from David Howels
 
 . Separate perf tests into multiple objects, one per test, from Jiri Olsa.
 
 . Fixes to /proc/pid/maps parsing, preparatory to supporting data maps,
   from Namhyung Kim
 
 . Fix compile error for non-NEWT builds, from Namhyung Kim
 
 . Implement ui_progress for GTK, from Namhyung Kim
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.14 (GNU/Linux)
 
 iQIcBAABAgAGBQJQqO+jAAoJENZQFvNTUqpATGIP/juZF47Al1+4So5KfdOTNPKD
 X9H23T31HrcK4z0Yk4upbi0qWW1do7RkoJOdwVbvMndYK8Mh0QEmZcmcJg7hzhJq
 v86/qGAbnWUi8H5g8VVhGCFRBbkdN2U6tKzBe3KzmgQnjq48/2EYsi4AlnfoyWoX
 u1VuBd1K3dQAvl4TqypxXeB84HJQ/nMtDtT6YMuMGfAPP4aCvCjEX365rgux8bGW
 nCA/ERppfvfj7QG/Z3Da/nI/qlHYPYjyZBuaj/X5qvF3GzPAcVQ5Qs5JlkQ9daiO
 RS3rR7eDfx7DTidTobIagfxgj0gYoY3/1gZVrLLAB1ByUJcpehbBgKxN6PvEvJFh
 FXfrXrZ8AtnxMBBN0Wnkqwm0z40RGe65bu0JqU8YroTVUUH+ZvO6U0WvDH4KVcpL
 iMJTWIpcpsgPWFEieW6rArSdYuuvAivrNxm2Sl1RNguOlxftHT4ZCTvxVPEwrOl9
 PWnoJhc5YxTfdaoJ8xHQaD7TyYj6RtycZw9hhBYD5mdDwpzBZdccJ2vgMlkBgeuL
 VOHCG0NxJVH6myexhfjrFqbJljAo024/nkqwTm3JHJr3WJv0qqOIFbmb8SA2kCpP
 QXnLCrfUk/MXdU69paWGMpFyG6+iuSDhyecy0iX/+xqV3EGOdVxVM1x/mxfBSC2p
 xU/aCDZvX0+YYv5797UK
 =9k43
 -----END PGP SIGNATURE-----

Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

 - UAPI fixes, from David Howels

 - Separate perf tests into multiple objects, one per test, from Jiri Olsa.

 - Fixes to /proc/pid/maps parsing, preparatory to supporting data maps,
   from Namhyung Kim

 - Fix compile error for non-NEWT builds, from Namhyung Kim

 - Implement ui_progress for GTK, from Namhyung Kim

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-08 15:18:41 +01:00
Linus Torvalds
1b3c393cd4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
 "Two stragglers:

   1) The new code that adds new flushing semantics to GRO can cause SKB
      pointer list corruption, manage the lists differently to avoid the
      OOPS.  Fix from Eric Dumazet.

   2) When TCP fast open does a retransmit of data in a SYN-ACK or
      similar, we update retransmit state that we shouldn't triggering a
      WARN_ON later.  Fix from Yuchung Cheng."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net: gro: fix possible panic in skb_gro_receive()
  tcp: bug fix Fast Open client retransmission
2012-12-07 17:00:57 -08:00
Rafael J. Wysocki
1a14f30b36 Merge branch 'acpi-general'
* acpi-general:
  pnpacpi: fix incorrect TEST_ALPHA() test
  ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000
  ACPI : do not use Lid and Sleep button for S5 wakeup
2012-12-07 23:14:35 +01:00
Rafael J. Wysocki
583bdc5982 Merge branch 'acpi-enumeration'
* acpi-enumeration:
  ACPI: add Haswell LPSS devices to acpi_platform_device_ids list
  ACPI: add documentation about ACPI 5 enumeration
2012-12-07 23:14:25 +01:00
Rafael J. Wysocki
8ab788f002 Merge branch 'acpi-dev-pm'
* acpi-dev-pm:
  ACPI / PM: Fix header of acpi_dev_pm_detach() in acpi.h
2012-12-07 23:14:11 +01:00
Rafael J. Wysocki
bf58cdffac Merge branch 'pm-devfreq'
* pm-devfreq: (23 commits)
  PM / devfreq: remove compiler error with module governors (2)
  PM / devfreq: Fix return value in devfreq_remove_governor()
  PM / devfreq: Fix incorrect argument in error message
  PM / devfreq: missing rcu_read_lock() added for find_device_opp()
  PM / devfreq: remove compiler error when a governor is module
  PM / devfreq: exynos4_bus.c: Fixed an alignment of the func call args.
  PM / devfreq: Add sysfs node to expose available governors
  PM / devfreq: allow sysfs governor node to switch governor
  PM / devfreq: governors: add GPL module license and allow module build
  PM / devfreq: map devfreq drivers to governor using name
  PM / devfreq: register governors with devfreq framework
  PM / devfreq: provide hooks for governors to be registered
  PM / devfreq: export update_devfreq
  PM / devfreq: Add sysfs node for representing frequency transition information.
  PM / devfreq: Add sysfs node to expose available frequencies
  PM / devfreq: documentation cleanups for devfreq header
  PM / devfreq: Use devm_* functions in exynos4_bus.c
  PM / devfreq: make devfreq_class static
  PM / devfreq: fix sscanf handling for writable sysfs entries
  PM / devfreq: kernel-doc typo corrections
  ...
2012-12-07 23:13:36 +01:00
Mika Westerberg
5e7779f039 ACPI: add Haswell LPSS devices to acpi_platform_device_ids list
All devices behind Haswell LPSS (Low Power Subsystem) should be represented
as platform devices so add them to the acpi_platform_device_ids list.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-12-07 23:12:01 +01:00
Mika Westerberg
59c3987805 ACPI: add documentation about ACPI 5 enumeration
Add a document that describes how to take advantage of ACPI enumeration for
buses like platform, I2C and SPI. In addition to that we document how to
translate ACPI GpioIo and GpioInt resources to be useful in Linux device
drivers.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-12-07 23:11:51 +01:00
Alan Cox
cdc87c5a30 pnpacpi: fix incorrect TEST_ALPHA() test
TEST_ALPHA() is broken and always returns 0.

[akpm@linux-foundation.org: return false for '@' as well, per Bjorn]
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-12-07 23:11:14 +01:00
Eric Dumazet
c3c7c254b2 net: gro: fix possible panic in skb_gro_receive()
commit 2e71a6f808 (net: gro: selective flush of packets) added
a bug for skbs using frag_list. This part of the GRO stack is rarely
used, as it needs skb not using a page fragment for their skb->head.

Most drivers do use a page fragment, but some of them use GFP_KERNEL
allocations for the initial fill of their RX ring buffer.

napi_gro_flush() overwrite skb->prev that was used for these skb to
point to the last skb in frag_list.

Fix this using a separate field in struct napi_gro_cb to point to the
last fragment.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-07 14:39:29 -05:00
Yuchung Cheng
93b174ad71 tcp: bug fix Fast Open client retransmission
If SYN-ACK partially acks SYN-data, the client retransmits the
remaining data by tcp_retransmit_skb(). This increments lost recovery
state variables like tp->retrans_out in Open state. If loss recovery
happens before the retransmission is acked, it triggers the WARN_ON
check in tcp_fastretrans_alert(). For example: the client sends
SYN-data, gets SYN-ACK acking only ISN, retransmits data, sends
another 4 data packets and get 3 dupacks.

Since the retransmission is not caused by network drop it should not
update the recovery state variables. Further the server may return a
smaller MSS than the cached MSS used for SYN-data, so the retranmission
needs a loop. Otherwise some data will not be retransmitted until timeout
or other loss recovery events.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-07 14:39:28 -05:00
Guennadi Liakhovetski
71e69211ea mmc: sdhci: implement the .card_event() method
Extracting a part of the SDHCI card tasklet into a .card_event()
implementation allows SDHCI hosts to use generic card-detection
services, e.g. the GPIO slot function.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-07 13:56:03 -05:00
Guennadi Liakhovetski
451c89578e mmc: extend the slot-gpio card-detection to use host's .card_event() method
The slot-gpio API provides a generic card-detection handler. To support a
wider range of hosts it has to call the host's card-event callback, if
implemented. Also increase the debounce interval to 200ms to match the
SDHCI driver.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-07 13:55:50 -05:00
Guennadi Liakhovetski
9f1fb60a23 mmc: add a card-event host operation
Some hosts need to perform additional actions upon card insertion or
ejection. Add a host operation to be called from card detection handlers.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-07 13:55:31 -05:00
Sachin Kamat
4577f77ba7 mmc: sdhci-s3c: Fix compilation warning
'sc' is used only when CONFIG_PM_RUNTIME is defined. Hence define it
conditionally.

Silences the following warning:
drivers/mmc/host/sdhci-s3c.c: In function ‘sdhci_s3c_notify_change’:
drivers/mmc/host/sdhci-s3c.c:378:20: warning: unused variable ‘sc’ [-Wunused-variable]

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-07 13:54:57 -05:00
Linus Torvalds
1afa471706 MMC fixes for 3.7:
- sdhci-s3c: Fix runtime PM regression against 3.7-rc1
  - sh-mmcif: Fix oops against 3.6
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJQwOsQAAoJEHNBYZ7TNxYMkiAQAKfrOAFIe2eH+Z651iowbZxs
 WUV5eocfZPDnahxpkOQmK7Oa+BA7Kqqa8bql0+8CXkrXNh5zDZ6uuK4M8fWWYIAp
 uRgLetjC3/jB9dBXP9oxNBJ6oXcq/fuwx33Zvxln1FVDGy15glCeJ9O2lHhcwiB2
 I5ezzOTyU1CogqofuSAh27/9Y6CagDuTBceoeW7ADYD+4nGNX/HET68T9WTaaR2p
 CM22ogAyMUyCBfACCT50m1LkzmhXq1cn6AptdZzHOhGuQ7QP0L2Ej1LBgTAIIoV+
 fJ4Nd7Ht8Xk5arnLBrQYtP8YOg5J0P6bt/Y8Dbqv4gM+vtsBIQ5mHRIFebMpz0to
 3zoH8m+Qq1/Ko+zT063FQNC3gRHQLyKurEIPTJO/IxhzIiw8MBT3bwR7rEGO1uCt
 8CW633dzu0SjG9Le4A5dLRjQ8s93HKhfCiqXm4/xkdPNgBLRQYDf09Z+G6RTIoaQ
 O7D6JjbgnGVdzy6HwuWK35LN74kyc8+rACDfbE9KMmtfYt94x6TMBfhQ/rTP5grv
 pBfLWHyRqScBLpE6RTXFm2FEAR5y1iCWRrZUtJwjJ4rqfgc4li3odvn08+5O2m7v
 PPEk+OKJSrsSu3f5kJSk4KKYPWFB9MqK+V6dKDjPvJ6u3afmPvx7USgt/zTxtp9c
 7Met6CmklOgokwhnFlrN
 =+gTB
 -----END PGP SIGNATURE-----

Merge tag 'mmc-fixes-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

Pull MMC fixes from Chris Ball:
 "Two small regression fixes:

   - sdhci-s3c: Fix runtime PM regression against 3.7-rc1
   - sh-mmcif: Fix oops against 3.6"

* tag 'mmc-fixes-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
  mmc: sh-mmcif: avoid oops on spurious interrupts (second try)
  Revert misapplied "mmc: sh-mmcif: avoid oops on spurious interrupts"
  mmc: sdhci-s3c: fix missing clock for gpio card-detect
2012-12-07 09:15:20 -08:00
Ingo Molnar
222e82bef4 Merge branch 'linus' into sched/core
Pick up the autogroups fix and other fixes.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-07 12:15:33 +01:00
Kuninori Morimoto
805f864ebe gpio: pcf857x: use client->irq for gpio_to_irq()
6e20a0a429
(gpio: pcf857x: enable gpio_to_irq() support)
added gpio_to_irq() support on pcf857x driver,
but it used pdata->irq.
This patch modifies driver to use client->irq instead of it.
It modifies kzm9g board platform settings,
and device probe information too.
This patch is tested on kzm9g board

Reported-by: Christian Engelmayer <christian.engelmayer@frequentis.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-12-07 09:16:12 +01:00
Mel Gorman
18a2f371f5 tmpfs: fix shared mempolicy leak
This fixes a regression in 3.7-rc, which has since gone into stable.

Commit 00442ad04a ("mempolicy: fix a memory corruption by refcount
imbalance in alloc_pages_vma()") changed get_vma_policy() to raise the
refcount on a shmem shared mempolicy; whereas shmem_alloc_page() went
on expecting alloc_page_vma() to drop the refcount it had acquired.
This deserves a rework: but for now fix the leak in shmem_alloc_page().

Hugh: shmem_swapin() did not need a fix, but surely it's clearer to use
the same refcounting there as in shmem_alloc_page(), delete its onstack
mempolicy, and the strange mpol_cond_copy() and __mpol_cond_copy() -
those were invented to let swapin_readahead() make an unknown number of
calls to alloc_pages_vma() with one mempolicy; but since 00442ad04a,
alloc_pages_vma() has kept refcount in balance, so now no problem.

Reported-and-tested-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-06 11:56:43 -08:00
Johannes Weiner
c702418f8a mm: vmscan: do not keep kswapd looping forever due to individual uncompactable zones
When a zone meets its high watermark and is compactable in case of
higher order allocations, it contributes to the percentage of the node's
memory that is considered balanced.

This requirement, that a node be only partially balanced, came about
when kswapd was desparately trying to balance tiny zones when all bigger
zones in the node had plenty of free memory.  Arguably, the same should
apply to compaction: if a significant part of the node is balanced
enough to run compaction, do not get hung up on that tiny zone that
might never get in shape.

When the compaction logic in kswapd is reached, we know that at least
25% of the node's memory is balanced properly for compaction (see
zone_balanced and pgdat_balanced).  Remove the individual zone checks
that restart the kswapd cycle.

Otherwise, we may observe more endless looping in kswapd where the
compaction code loops back to reclaim because of a single zone and
reclaim does nothing because the node is considered balanced overall.

See for example

  https://bugzilla.redhat.com/show_bug.cgi?id=866988

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-and-tested-by: Thorsten Leemhuis <fedora@leemhuis.info>
Reported-by: Jiri Slaby <jslaby@suse.cz>
Tested-by: John Ellson <john.ellson@comcast.net>
Tested-by: Zdenek Kabelac <zkabelac@redhat.com>
Tested-by: Bruno Wolff III <bruno@wolff.to>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-06 11:29:57 -08:00
Mel Gorman
60177d31d2 mm: compaction: validate pfn range passed to isolate_freepages_block
Commit 0bf380bc70 ("mm: compaction: check pfn_valid when entering a
new MAX_ORDER_NR_PAGES block during isolation for migration") added a
check for pfn_valid() when isolating pages for migration as the scanner
does not necessarily start pageblock-aligned.

Since commit c89511ab2f ("mm: compaction: Restart compaction from near
where it left off"), the free scanner has the same problem.  This patch
makes sure that the pfn range passed to isolate_freepages_block() is
within the same block so that pfn_valid() checks are unnecessary.

In answer to Henrik's wondering why others have not reported this:
reproducing this requires a large enough hole with the right aligment to
have compaction walk into a PFN range with no memmap.  Size and
alignment depends in the memory model - 4M for FLATMEM and 128M for
SPARSEMEM on x86.  It needs a "lucky" machine.

Reported-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-06 11:17:33 -08:00
Madhvapathi Sriram
1a1f1f0495 mmc: sdhci-pci: Enable SDHCI_CAN_DO_HISPD for Ricoh SDHCI controller
The Ricoh SDHCI controllers support Highspeed clocks as evident from
the ricoh_mmc_probe_slot() settings. Hence, SDHCI_CAN_DO_HISPD needs
to be set to enable SDIO client drivers to set/enable high speed clock
settings

Signed-off-by: Madhvapathi Sriram <Madhvapathi.Sriram@csr.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:15 -05:00
Russell King
f8ec589b86 mmc: sdhci-dove: allow GPIOs to be used for card detection on Dove
This commit taken from Rabeeh's Cubox kernel and re-worked for DT;
Sebastian Hasselbrath is believed to be the original author.

Some Cuboxes require a GPIO for card detection; this implements the
optional GPIO support for card detection.  This GPIO is logic 0 for
card inserted.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:14 -05:00
Russell King
c430689f3f mmc: sdhci-dove: use two-stage initialization for sdhci-pltfm
We need to use the two-stage initialization for sdhci-pltfm if we're
going to do anything extra at initialization time.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:14 -05:00
Russell King
7430e77e64 mmc: sdhci-dove: use devm_clk_get()
Use devm_clk_get() rather than clk_get() to make cleanup paths more simple.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:13 -05:00
Haijun Zhang
a4071fbbb9 mmc: eSDHC: Recover from ADMA errors
A-003500: False ADMA Error might be reported when ADMA is used for
multiple block read command with Stop at Block Gap. If PROCTL[SABGREQ]
is set when the particular block's data is received by the System side
logic before entire block (with CRC) data is received by the SD side
logic, and also if ADMA descriptor line is fetched at the same time,
then DMA engine might report false ADMA error. eSDHC might not be able
to Continue (PROCTL[CREQ]=1) after Stop at Block Gap.
This issue will impact the eSDHC IP VVN2.3.

Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com>
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:13 -05:00
Jaehoon Chung
b2f7cb45c0 mmc: dw_mmc: remove duplicated buswidth code
ctype is using 1-bit buswidth mode by default.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:12 -05:00