c31b50e (mmc: core: Use delayed work in clock gating framework,
2011-11-14) missed a few things during review:

 o A useless pr_info()

 o milliseconds was written as two words

 o The sysfs file had units in its output

Fix all three problems.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Cc: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Enable boot partitions to be read-only locked until next power on via
a sysfs entry. There will be one sysfs entry for each boot partition:

/sys/block/mmcblkXbootY/ro_lock_until_next_power_on

Each boot partition is locked by writing 1 to its file.
Signed-off-by: NJohan Rudholm <johan.rudholm@stericsson.com>
Signed-off-by: NJohn Beckett <john.beckett@stericsson.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add pm_caps into platform_data. This is power management, usually
for SDIO device such as SDIO WLAN.
Signed-off-by: NSangwook Lee <sangwook.lee@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

sdhci-s3c updates pm_caps from platform data for SDIO PM.
Signed-off-by: NSangwook Lee <sangwook.lee@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add a function mmc_detect_card_removed() which upper layers can use to
determine immediately if a card has been removed. This function should
be called after an I/O request fails so that all queued I/O requests
can be errored out immediately instead of waiting for the card device
to be removed.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NSujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NCong Wang <amwang@redhat.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch converts the drivers in drivers/mmc/host/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: N"Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Acked-by: NDavid Brown <davidb@codeaurora.org>
Acked-by: NViresh Kumar <viresh.kumar@st.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NAnton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

In ancient times it was necessary to manually initialize the bus field of an
spi_driver to spi_bus_type. These days this is done in spi_driver_register(),
so we can drop the manual assignment.

The patch was generated using the following coccinelle semantic patch:
// <smpl>
@@
identifier _driver;
@@
struct spi_driver _driver = {
	.driver = {
-		.bus = &spi_bus_type,
	},
};
// </smpl>
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

Replace ilog2(__rounddown_pow_of_two(x)) with the equivalent but much
simpler fls(x) - 1.
Reported-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

If the read or write buffer size associated with the command sent
through the mmc_blk_ioctl is zero, do not prepare data buffer.

This enables a ioctl(2) call to for instance send a MMC_SWITCH to set
a byte in the ext_csd.
Signed-off-by: NJohan Rudholm <johan.rudholm@stericsson.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

1ms is enough for hardware to change the clock to stable.
100ms is too long in the tasklet.
Signed-off-by: NTony Lin <tony.lin@freescale.com>
CC: Xiaobo Xie <X.Xie@freescale.com>
CC: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

If max_seg_size is unaligned, mmc_test_map_sg() may create sg element
sizes that are not aligned with 512 byte. Fix, align max_seg_size at
mmc_test_area_init().
Signed-off-by: NPer Forlin <per.forlin@stericsson.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Signed-off-by: NPer Forlin <per.forlin@stericsson.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch adds support for sdio UHS cards per the version 3.0
spec.

UHS mode is only enabled for version 3.0 cards when both the
host and the controller support UHS modes.

1.8v signaling support is removed if both the card and the
host do not support UHS.  This is done to maintain
compatibility and some system/card combinations break when
1.8v signaling is enabled when the host does not support UHS.
Signed-off-by: NPhilip Rakity <prakity@marvell.com>
Signed-off-by: NAaron Lu <Aaron.lu@amd.com>
Reviewed-by: NArindam Nath <arindam.nath@amd.com>
Tested-by: NBing Zhao <bzhao@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Suspend/Resume is missing from sdhci-spear driver. This patch adds
support for suspend/resume for this driver.
Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

Current clock gating framework disables the MCI clock as soon as the
request is completed and enables it when a request arrives. This aggressive
clock gating framework, when enabled, cause following issues:

When there are back-to-back requests from the Queue layer, we unnecessarily
end up disabling and enabling the clocks between these requests since 8MCLK
clock cycles is a very short duration compared to the time delay between
back to back requests reaching the MMC layer. This overhead can effect the
overall performance depending on how long the clock enable and disable
calls take which is platform dependent. For example on some platforms we
can have clock control not on the local processor, but on a different
subsystem and the time taken to perform the clock enable/disable can add
significant overhead.

Also if the host controller driver decides to disable the host clock too
when mmc_set_ios function is called with ios.clock=0, it adds additional
delay and it is highly possible that the next request had already arrived
and unnecessarily blocked in enabling the clocks. This is seen frequently
when the processor is executing at high speeds and in multi-core platforms
thus reduces the overall throughput compared to if clock gating is
disabled.

Fix this by delaying turning off the clocks by posting request on
delayed workqueue. Also cancel the unscheduled pending work, if any,
when there is access to card.

sysfs entry is provided to tune the delay as needed, default
value set to 200ms.
Signed-off-by: NSujit Reddy Thumma <sthumma@codeaurora.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

No functional change; adds macros for card manufacturer IDs.
Signed-off-by: NChris Ball <cjb@laptop.org>
Cc: Andrei E. Warkentin <andrey.warkentin@gmail.com>
Cc: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>

This patch is to expose the actual SDCLK frequency in
/sys/kernel/debug/mmcX/ios entry.

For example, if the max clk for a normal speed card is 20MHz this
is reported in /sys/kernel/debug/mmcX/ios.  Unfortunately the actual
SDCLK frequency (i.e. Baseclock / divisor) is not reported at all:
for example, in that case, on Arasan HC, it should be 48/4=12 (MHz).
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

This patch allows any block size to be set on the SDIO link,
and still have an arbitrary sized packet (adjusted in size by
using sdio_align_size) transferred in an optimal way
(preferably one transfer).

Previously if the block size was larger than the default of
512 bytes and the transfer size was exactly one block size
(possibly thanks to using sdio_align_size to get an optimal
transfer size), it was sent as a number of byte transfers instead
of one block transfer. Also if the number of blocks was
(max_blocks * N) + 1, the tranfer would be conducted with a number
of blocks and finished off with a number of byte transfers.

When doing this change it was also possible to break out the quirk
for broken byte mode in a much cleaner way, and collect the logic of
when to do byte or block transfer in one function instead of two.
Signed-off-by: NStefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: NUlf Hansson <ulf.hansson@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

Add new macros for the high speed 50MHz case, rather than having
a confusing reuse of the value for UHS SDR50, which is 100MHz.
Reported-by: NAaron Lu <aaron.lu@amd.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

We have a duplicate name and definition for the offset of the thread.info
struct within the task struct in our asm-offsets.c code. Remove one of them,
and consolidate to use a single define, TASK_INFO.
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>

The init_task code can be the same for both mmu and non-mmu targets.
None of the alignment carried out in the the current init_task code
is necessary. The linker script takes care of aligning the init_thread
structure to a THREAD SIZE boundary, and that is all we need.

So use the init_task.c code for all target types, that makes m68k
code consistent with what most other architectures do.
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>

The fasthandler code was removed long ago. Remove the now unused
declaration of it.
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>

gpiolib provides __gpio_to_irq() to map gpiolib gpios to interrupts - hook
that up on m68k.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>

Updated to merge the valid bits of the two m68k patches.

This converts the m86k clocksources to use clocksource_register_hz/khz

This is untested, so any assistance in testing would be appreciated!

CC: Geert Uytterhoeven <geert@linux-m68k.org>
CC: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: NJohn Stultz <johnstul@us.ibm.com>
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  VFS: Fix race between CPU hotplug and lglocks

for linus: writeback reason binary tracing format fix

* tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  writeback: show writeback reason with __print_symbolic

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig: adapt update-po-config to new UML layout

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] omap3isp: Fix crash caused by subdevs now having a pointer to devnodes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: call d_instantiate after all ops are setup
  Btrfs: fix worker lock misuse in find_worker

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix MSIQ HV call ordering in pci_sun4v_msiq_build_irq().

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netfilter: xt_connbytes: handle negation correctly
  net: relax rcvbuf limits
  rps: fix insufficient bounds checking in store_rps_dev_flow_table_cnt()
  net: introduce DST_NOPEER dst flag
  mqprio: Avoid panic if no options are provided
  bridge: provide a mtu() method for fake_dst_ops

"! --connbytes 23:42" should match if the packet/byte count is not in range.

As there is no explict "invert match" toggle in the match structure,
userspace swaps the from and to arguments
(i.e., as if "--connbytes 42:23" were given).

However, "what <= 23 && what >= 42" will always be false.

Change things so we use "||" in case "from" is larger than "to".

This change may look like it breaks backwards compatibility when "to" is 0.
However, older iptables binaries will refuse "connbytes 42:0",
and current releases treat it to mean "! --connbytes 0:42",
so we should be fine.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

This closes races where btrfs is calling d_instantiate too soon during
inode creation.  All of the callers of btrfs_add_nondir are updated to
instantiate after the inode is fully setup in memory.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

Dan Carpenter noticed that we were doing a double unlock on the worker
lock, and sometimes picking a worker thread without the lock held.

This fixes both errors.
Signed-off-by: NChris Mason <chris.mason@oracle.com>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>

skb->truesize might be big even for a small packet.

Its even bigger after commit 87fb4b7b (net: more accurate skb
truesize) and big MTU.

We should allow queueing at least one packet per receiver, even with a
low RCVBUF setting.
Reported-by: NMichal Simek <monstr@monstr.eu>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Setting a large rps_flow_cnt like (1 << 30) on 32-bit platform will
cause a kernel oops due to insufficient bounds checking.

	if (count > 1<<30) {
		/* Enforce a limit to prevent overflow */
		return -EINVAL;
	}
	count = roundup_pow_of_two(count);
	table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));

Note that the macro RPS_DEV_FLOW_TABLE_SIZE(count) is defined as:

	... + (count * sizeof(struct rps_dev_flow))

where sizeof(struct rps_dev_flow) is 8.  (1 << 30) * 8 will overflow
32 bits.

This patch replaces the magic number (1 << 30) with a symbolic bound.
Suggested-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NXi Wang <xi.wang@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>