mmc: core: enhance card removal judgement for slow removal

Function _mmc_detect_card_removed will be called to know whether
the card is still present when host->bus_ops->detect is called.
In current code, the return value of this function generally only
depend on the result of sending cmd13 to card, which may not safe
for card with detection support like slot gpio detection.
Because the communication status between host and card may out of
sync with the detect status if remove the card slowly or hands shake
during the process. The direct reason is the async between card
detect switch and card/slot pad contaction in hardware, which is
defined by spec.

The spec define card insert/remove sequence as below (both standard size
SD card and MicroSD card have the same sequence):
"Part 1 Standard Size SD Card Mechanical Addendum Ver4.00 Final,
Appendix C: Card Detection Switch" (Take normally open type as example)
a)SD card insertion sequence:
  The card detection switch should be turned on after all SD card
  contact pads are connected to the host connector contact pads.
b)SD removal sequence:
  The card detection switch should be turned off when the SD card
  is just going to be removed and before any SD card contact pad is
  disconnected from the host connector contact pad.

Below is the sequence when this issue occur (Take slot gpio detection
as example and remove the card slowly during the process):
1. gpio level changed and card detect interrupt triggered.
2. mmc_rescan was launched.
3. the card pads were still contacted with the slot pads because of slow
   removal. So _mmc_detect_card_removed and mmc_rescan think card was
   still present (cmd13 succeed).
4. card pads were discontacted from the card slot pads.
So the card was actually removed finally but the card removal event
has been missed by system.
The interval length between step 1 and step 4 depends on the
card removal speed. If it's longer than the detect work schedule
delay which is 200ms, this issue will likely happen.

This patch add the card detect status check in function
_mmc_detect_card_removed if cmd13 check succeed and host->ops->get_cd
provided. If get_cd detect no card present then schedule another detect
work 200ms later.

CRs-fixed: 655754
Change-Id: I167309242c9937b023d14797177deb0e6be8838d
Signed-off-by: Kevin Liu <kliu5@marvell.com>
Git-commit: 1450734ec61cda7bbb77afc8cb412b9d64c62d9a
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc.git
Tested-by: Johan Rudholm <johan.rudholm@stericsson.com>
Reviewed-by: Philip Rakity <prakity@nvidia.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mmc: sdhci: Use max timeout and skip timeout calculation

Several data-timeout issues were seen, most of which were
due to the card taking a longer time to respond. This patch
increases the timeout of the controller to 0xF i.e. max
possible.

Change-Id: I6739de3eb5d9cccf8e39d9dc4730056782334162
CRs-Fixed: 536832
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: print an error on FLUSH timeout

Up until now the FLUSH timeout error was not printed and there
was no way to know if the FLUSH completed successfully or not.
Printing the FLUSH failure will help to identify if FS corruption
happened due to this timeout.

Change-Id: Ibbb51d030d7130d63974a1b4319ad4a24621c595
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: queue: do not clean current request when urgent in progress

As a result of following fix: "mmc: core: do not reinsert prepeared
FUA and FLUSH requests in stop flow" REQ_FUA and REQ_FLUSH requests
are not reinserted back into i/o scheduler, but instead started request
execution.

This change will prevent cleaning current request pointer for such
requests.

Change-Id: I25f8706954fb538be62182c87d5fb20354696b7a
CRs-fixed: 600127
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
mmc: block: Fix an invalid use of req->cmd_flag in DISCARD operation

When handling a DISCARD operation, the MMC request data structure may be
freed in memory. Therefore, it can't be used to retrieve the cmd_flags
for checking if MMC_REQ_NOREINSERT_MASK is set:
(!(mq->mqrq_cur->req->cmd_flags & MMC_REQ_NOREINSERT_MASK)))).

To prevent the issue we should use the local variable of cmd_flags.

Change-Id: I3b25a0e734325355c50d4d5f5b38e9631ae41dd9
CRs-Fixed: 683957
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
mmc: core: invoke low power mode if card is not present

If get_cd is defined and card is not present mmc_rescan
returns without invoking mmc_power_off. This would prevent
low-power modes.
Hence, invoke mmc_power_off if card is not present before
exiting mmc_rescan.

CRs-fixed: 655754
Change-Id: Id148fdf48e7f112da1251f8b60ac5d4c89a89e9f
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
net: wireless: bcmdhd: Set KSO enable sleep to 5ms

Signed-off-by: Ecco park <eccopark@broadcom.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
Reduce min capture period size from 320 to 64

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
lib: cpu_rmap: avoid flushing all workqueues

In some cases, free_irq_cpu_rmap() is called while holding a lock (eg
rtnl).  This can lead to deadlocks, because it invokes
flush_scheduled_work() which ends up waiting for whole system workqueue
to flush, but some pending works might try to acquire the lock we are
already holding.

This commit uses reference-counting to replace
irq_run_affinity_notifiers().  It also removes
irq_run_affinity_notifiers() altogether.

[akpm@linux-foundation.org: eliminate free_cpu_rmap, rename cpu_rmap_reclaim() to cpu_rmap_release(), propagate kref_put() retval from cpu_rmap_put()]
Signed-off-by: David Decotigny <decot@googlers.com>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
ARM: 7569/1: mm: uninitialized warning corrections

The variables here are really not used uninitialized.

arch/arm/mm/alignment.c: In function 'do_alignment':
arch/arm/mm/alignment.c:327:15: warning: 'offset.un' may be used uninitialized in this function [-Wmaybe-uninitialized]
arch/arm/mm/alignment.c:748:21: note: 'offset.un' was declared here

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
[PATCH] Staging: android: binder: More offset validation.

Make sure offsets don't point to overlapping flat_binder_object
structs.

Change-Id: I425ab0c46fbe2b00ed679c5becf9e8140395eb40
Signed-off-by: Arve HjÃ¸nnevÃ¥g <arve@android.com>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
ARM: Don't dump vmalloc addresses with show_data()

Memory-mapped IO address spaces cannot be safely dumped at will.
Some addresses may not be available (clocked, powered) at all times,
and may result in hangs or bus decode errors if accessed. Other
registers that are accessible may have read side-effects, and dumping
them may have adverse affects on stability or the functionality of
the affected peripheral.

Be safe, and skip dumping such addresses altogether.

CRs-Fixed: 625442
Change-Id: I4cfa75f027ededf841a0240715af0db385857cbe
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
Signed-off-by: Vignesh Radhakrishnan <vigneshr@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
ARM: Improve vmalloc address checking in show_data()

There is an unhandled corner case with the current check
which has recently been hit. The nbytes argument may be
large enough for the range being dumped to cross a
boundary between page-table mappings, and dump addresses
which are vmalloc'd in the neighboring mapping.

Check every address being dumped to see if its vmalloc'd,
not just the address passed to show_data().

CRs-Fixed: 625442
Change-Id: I255b093808177321f5202dcacea337ee333bfc63
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>