ASoC: msm-hdmi-codec-rx: sync state with HDMI core

To keep the state of the HDMI core and HDMI audio
sessions congruent, audio checks the state of the
core on startup, then notifies the core of the
active audio session.  On shutdown, notifies the
core of the event.

Change-Id: I8f90a4610ed9345c1affa67a7fee306e7d388d85
CRs-Fixed: 539309
Author: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Devin Kim <dojip.kim@lge.com>
sync: Fix a race condition between release_obj and print_obj

Before this change, a timeline would only be removed from the timeline
list *after* the sync driver had its release_obj() called. However, the
driver's release_obj() may free resources needed by print_obj().

Although the timeline list is locked when print_obj() is called, it is
not locked when release_obj() is called. If one CPU was in print_obj()
when another was in release_obj(), the print_obj() may make unsafe
accesses.

It is not actually necessary to hold the timeline list lock when calling
release_obj() if the call is made after the timeline is unlinked from
the list, since there is no possibility another thread could be in --
or enter -- print_obj() for that timeline.

This change moves the release_obj() call to after the timeline is
unlinked, preventing the above race from occurring.

Signed-off-by: Alistair Strachan <alistair.strachan@imgtec.com>
ARM: 7668/1: fix memset-related crashes caused by recent GCC (4.7.2) optimizations

Recent GCC versions (e.g. GCC-4.7.2) perform optimizations based on
assumptions about the implementation of memset and similar functions.
The current ARM optimized memset code does not return the value of
its first argument, as is usually expected from standard implementations.

For instance in the following function:

void debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
{
	memset(waiter, MUTEX_DEBUG_INIT, sizeof(*waiter));
	waiter->magic = waiter;
	INIT_LIST_HEAD(&waiter->list);
}

compiled as:

800554d0 <debug_mutex_lock_common>:
800554d0:       e92d4008        push    {r3, lr}
800554d4:       e1a00001        mov     r0, r1
800554d8:       e3a02010        mov     r2, #16 ; 0x10
800554dc:       e3a01011        mov     r1, #17 ; 0x11
800554e0:       eb04426e        bl      80165ea0 <memset>
800554e4:       e1a03000        mov     r3, r0
800554e8:       e583000c        str     r0, [r3, #12]
800554ec:       e5830000        str     r0, [r3]
800554f0:       e5830004        str     r0, [r3, #4]
800554f4:       e8bd8008        pop     {r3, pc}

GCC assumes memset returns the value of pointer 'waiter' in register r0; causing
register/memory corruptions.

This patch fixes the return value of the assembly version of memset.
It adds a 'mov' instruction and merges an additional load+store into
existing load/store instructions.
For ease of review, here is a breakdown of the patch into 4 simple steps:

Step 1
======
Perform the following substitutions:
ip -> r8, then
r0 -> ip,
and insert 'mov ip, r0' as the first statement of the function.
At this point, we have a memset() implementation returning the proper result,
but corrupting r8 on some paths (the ones that were using ip).

Step 2
======
Make sure r8 is saved and restored when (! CALGN(1)+0) == 1:

save r8:
-       str     lr, [sp, #-4]!
+       stmfd   sp!, {r8, lr}

and restore r8 on both exit paths:
-       ldmeqfd sp!, {pc}               @ Now <64 bytes to go.
+       ldmeqfd sp!, {r8, pc}           @ Now <64 bytes to go.
(...)
        tst     r2, #16
        stmneia ip!, {r1, r3, r8, lr}
-       ldr     lr, [sp], #4
+       ldmfd   sp!, {r8, lr}

Step 3
======
Make sure r8 is saved and restored when (! CALGN(1)+0) == 0:

save r8:
-       stmfd   sp!, {r4-r7, lr}
+       stmfd   sp!, {r4-r8, lr}

and restore r8 on both exit paths:
        bgt     3b
-       ldmeqfd sp!, {r4-r7, pc}
+       ldmeqfd sp!, {r4-r8, pc}
(...)
        tst     r2, #16
        stmneia ip!, {r4-r7}
-       ldmfd   sp!, {r4-r7, lr}
+       ldmfd   sp!, {r4-r8, lr}

Step 4
======
Rewrite register list "r4-r7, r8" as "r4-r8".

Signed-off-by: Ivan Djelic <ivan.djelic@parrot.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Conflicts:
	arch/arm/lib/memset.S
ARM: 7670/1: fix the memset fix

Commit 455bd4c430b0 ("ARM: 7668/1: fix memset-related crashes caused by
recent GCC (4.7.2) optimizations") attempted to fix a compliance issue
with the memset return value.  However the memset itself became broken
by that patch for misaligned pointers.

This fixes the above by branching over the entry code from the
misaligned fixup code to avoid reloading the original pointer.

Also, because the function entry alignment is wrong in the Thumb mode
compilation, that fixup code is moved to the end.

While at it, the entry instructions are slightly reworked to help dual
issue pipelines.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
seq_file: always update file->f_pos in seq_lseek()

This issue was first pointed out by Jiaxing Wang several months ago, but no
further comments:
https://lkml.org/lkml/2013/6/29/41

As we know pread() does not change f_pos, so after pread(), file->f_pos
and m->read_pos become different. And seq_lseek() does not update file->f_pos
if offset equals to m->read_pos, so after pread() and seq_lseek()(lseek to
m->read_pos), then a subsequent read may read from a wrong position, the
following program produces the problem:

    char str1[32] = { 0 };
    char str2[32] = { 0 };
    int poffset = 10;
    int count = 20;

    /*open any seq file*/
    int fd = open("/proc/modules", O_RDONLY);

    pread(fd, str1, count, poffset);
    printf("pread:%s\n", str1);

    /*seek to where m->read_pos is*/
    lseek(fd, poffset+count, SEEK_SET);

    /*supposed to read from poffset+count, but this read from position 0*/
    read(fd, str2, count);
    printf("read:%s\n", str2);

out put:
pread:
 ck_netbios_ns 12665
read:
 nf_conntrack_netbios

/proc/modules:
nf_conntrack_netbios_ns 12665 0 - Live 0xffffffffa038b000
nf_conntrack_broadcast 12589 1 nf_conntrack_netbios_ns, Live 0xffffffffa0386000

So we always update file->f_pos to offset in seq_lseek() to fix this issue.

cherry-picked from https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/seq_file.c?id=05e16745c0c471bba313961b605b6da3b21a853d

Signed-off-by: Jiaxing Wang <hello.wjx@gmail.com>
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Conflicts:
	fs/seq_file.c

Change-Id: If419b92498e2c3e08669a4342e9b9ebf99ad3768
Signed-off-by: Devin Kim <dojip.kim@lge.com>
seq_file: always clear m->count when we free m->buf

Once we'd freed m->buf, m->count should become zero - we have no valid
contents reachable via m->buf.

cherry-picked from https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/seq_file.c?id=801a76050bcf8d4e500eb8d048ff6265f37a61c8

Change-Id: I4c1d3e69db4ecf5362e2a5d05bfd7db754dc6dc6
Reported-by: Charley (Hao Chuan) Chu <charley.chu@broadcom.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Devin Kim <dojip.kim@lge.com>
fs/dcache.c: Fix the too small buffer for dname

temp[64] is used for internal temporary buffer in dynamic_dname().
This is for dname. But It's too small. dname's size may be > 64.
In that case, it returns as -ENAMETOOLONG. So Increase the buffer size
to 256 for avoiding this issue.

The following was caused by the small buffer.
WARNING: at /kernel/mm/page_alloc.c:2470 __alloc_pages_nodemask+0x24c/0x938()
CPU: 2 PID: 505 Comm: android.bg Not tainted 3.10.0-g2f73780-00003-g2ff41d9-dirty #13
[<c010ba3c>] (unwind_backtrace+0x0/0x11c) from [<c0109cac>] (show_stack+0x10/0x14)
[<c0109cac>] (show_stack+0x10/0x14) from [<c01939a0>] (warn_slowpath_common+0x48/0x68)
[<c01939a0>] (warn_slowpath_common+0x48/0x68) from [<c0193a7c>] (warn_slowpath_null+0x18/0x20)
[<c0193a7c>] (warn_slowpath_null+0x18/0x20) from [<c0222454>] (__alloc_pages_nodemask+0x24c/0x938)
[<c0222454>] (__alloc_pages_nodemask+0x24c/0x938) from [<c0222b50>] (__get_free_pages+0x10/0x24)
[<c0222b50>] (__get_free_pages+0x10/0x24) from [<c024faf8>] (kmalloc_order_trace+0x24/0xf0)
[<c024faf8>] (kmalloc_order_trace+0x24/0xf0) from [<c024fe20>] (__kmalloc+0x30/0x244)
[<c024fe20>] (__kmalloc+0x30/0x244) from [<c02723c8>] (seq_read+0x270/0x464)
[<c02723c8>] (seq_read+0x270/0x464) from [<c0256a18>] (vfs_read+0xa4/0x134)
[<c0256a18>] (vfs_read+0xa4/0x134) from [<c0256de8>] (SyS_read+0x38/0x68)
[<c0256de8>] (SyS_read+0x38/0x68) from [<c0106140>] (ret_fast_syscall+0x0/0x30)

Change-Id: I74f5217ba3c4be73e91f33f900f1f0c26810cc05
Signed-off-by: Devin Kim <dojip.kim@lge.com>
SELinux: include definition of new capabilities

The kernel has added CAP_WAKE_ALARM and CAP_EPOLLWAKEUP.  We need to
define these in SELinux so they can be mediated by policy.

Change-Id: I8a3e0db15ec5f4eb05d455a57e8446a8c2b484c2
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
[sds: rename epollwakeup to block_suspend to match upstream merge]
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
SELinux: Fix possible NULL pointer dereference in selinux_inode_permission()

While running stress tests on adding and deleting ftrace instances I hit
this bug:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
  IP: selinux_inode_permission+0x85/0x160
  PGD 63681067 PUD 7ddbe067 PMD 0
  Oops: 0000 [#1] PREEMPT
  CPU: 0 PID: 5634 Comm: ftrace-test-mki Not tainted 3.13.0-rc4-test-00033-gd2a6dde-dirty #20
  Hardware name:                  /DG965MQ, BIOS MQ96510J.86A.0372.2006.0605.1717 06/05/2006
  task: ffff880078375800 ti: ffff88007ddb0000 task.ti: ffff88007ddb0000
  RIP: 0010:[<ffffffff812d8bc5>]  [<ffffffff812d8bc5>] selinux_inode_permission+0x85/0x160
  RSP: 0018:ffff88007ddb1c48  EFLAGS: 00010246
  RAX: 0000000000000000 RBX: 0000000000800000 RCX: ffff88006dd43840
  RDX: 0000000000000001 RSI: 0000000000000081 RDI: ffff88006ee46000
  RBP: ffff88007ddb1c88 R08: 0000000000000000 R09: ffff88007ddb1c54
  R10: 6e6576652f6f6f66 R11: 0000000000000003 R12: 0000000000000000
  R13: 0000000000000081 R14: ffff88006ee46000 R15: 0000000000000000
  FS:  00007f217b5b6700(0000) GS:ffffffff81e21000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033^M
  CR2: 0000000000000020 CR3: 000000006a0fe000 CR4: 00000000000007f0
  Call Trace:
    security_inode_permission+0x1c/0x30
    __inode_permission+0x41/0xa0
    inode_permission+0x18/0x50
    link_path_walk+0x66/0x920
    path_openat+0xa6/0x6c0
    do_filp_open+0x43/0xa0
    do_sys_open+0x146/0x240
    SyS_open+0x1e/0x20
    system_call_fastpath+0x16/0x1b
  Code: 84 a1 00 00 00 81 e3 00 20 00 00 89 d8 83 c8 02 40 f6 c6 04 0f 45 d8 40 f6 c6 08 74 71 80 cf 02 49 8b 46 38 4c 8d 4d cc 45 31 c0 <0f> b7 50 20 8b 70 1c 48 8b 41 70 89 d9 8b 78 04 e8 36 cf ff ff
  RIP  selinux_inode_permission+0x85/0x160
  CR2: 0000000000000020

Investigating, I found that the inode->i_security was NULL, and the
dereference of it caused the oops.

in selinux_inode_permission():

	isec = inode->i_security;

	rc = avc_has_perm_noaudit(sid, isec->sid, isec->sclass, perms, 0, &avd);

Note, the crash came from stressing the deletion and reading of debugfs
files.  I was not able to recreate this via normal files.  But I'm not
sure they are safe.  It may just be that the race window is much harder
to hit.

What seems to have happened (and what I have traced), is the file is
being opened at the same time the file or directory is being deleted.
As the dentry and inode locks are not held during the path walk, nor is
the inodes ref counts being incremented, there is nothing saving these
structures from being discarded except for an rcu_read_lock().

The rcu_read_lock() protects against freeing of the inode, but it does
not protect freeing of the inode_security_struct.  Now if the freeing of
the i_security happens with a call_rcu(), and the i_security field of
the inode is not changed (it gets freed as the inode gets freed) then
there will be no issue here.  (Linus Torvalds suggested not setting the
field to NULL such that we do not need to check if it is NULL in the
permission check).

Note, this is a hack, but it fixes the problem at hand.  A real fix is
to restructure the destroy_inode() to call all the destructor handlers
from the RCU callback.  But that is a major job to do, and requires a
lot of work.  For now, we just band-aid this bug with this fix (it
works), and work on a more maintainable solution in the future.

Link: http://lkml.kernel.org/r/20140109101932.0508dec7@gandalf.local.home
Link: http://lkml.kernel.org/r/20140109182756.17abaaa8@gandalf.local.home

Cc: stable@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
msm: msm_watchdog_v2: Increase watchdog bark timeout during panic

We now wait for 10 seconds during panic handling before triggerring a
watchdog bark. This is done because the earlier timeout of 4 seconds
was not sufficient for all targets which resulted in the device resetting
in the middle of the panic handler.

Bug: 11293746

Change-Id: I1a45ac2ccf626d93848763fe56bb6ad164c2471d
Signed-off-by: Ameya Thakur <ameyat@codeaurora.org>
(cherry picked from commit c2acf59dc892653e1a67852c5bdb298ed1a09689)
fix false disconnect due to a signal sent to the reading process

- In the current implementation, when a signal is sent to the reading process,
  read is cancelled by calling usb_ep_dequeue, which lead into calling
  acc_complete_out with ECONNRESET, but the current logic treats it as
  disconnection, which makes the device inaccessible until cable is actually
  disconnected.
- The fix calls disconnect only when ESHUTDOWN error is passed.
- If data has already arrived while trying cancelling, the data is marked
  as available, and it will be read out on the next read. This is necessary
  as USB bulk is assumed to guarantee no data loss.

Signed-off-by: keunyoung <keunyoung@google.com>
tcp: add a sysctl to config the tcp_default_init_rwnd

The default initial rwnd is hardcoded to 10.

Now we allow it to be controlled via
  /proc/sys/net/ipv4/tcp_default_init_rwnd
which limits the values from 3 to 100

This is somewhat needed because ipv6 routes are
autoconfigured by the kernel.

See "An Argument for Increasing TCP's Initial Congestion Window"
in https://developers.google.com/speed/articles/tcp_initcwnd_paper.pdf

Change-Id: I386b2a9d62de0ebe05c1ebe1b4bd91b314af5c54
Signed-off-by: JP Abgrall <jpa@google.com>

Conflicts:
	include/net/tcp.h
cpufreq: Fix policy getting stuck when user & kernel min/max don't overlap

Every __cpufreq_set_policy starts with checking the new policy min/max has
some overlap with the current policy min/max. This works out fine until we
end up with the policy min/max being set to a range that doesn't overlap
with the user policy min/max. Once we get into this situation, the check at
the start of __cpufreq_set_policy fails and prevents us from getting out of
this state.

This only happens when one of the CPUFREQ_ADJUST/CPUFREQ_INCOMPATIBLE
notifiers called inside __cpufreq_set_policy pick a min/max outside the
range of user policy min/max.

The real intent of the check at the start of __cpufreq_set_policy is to
make sure userspace can't set user policy min > user policy max. Since
__cpufreq_set_policy always gets called only with current user policy
min/max except when the actual user space policy min/max is changed, we can
fix the issue by simply checking the new policy min/max against current
user policy min/max.

Change-Id: Iaac805825e64d7985c41fb9052bd96baacdf3d6f
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
(cherry picked from commit 9decaa70a478ef26bfca840febe6296493a249d9)
mdss: Add newline to VSYNC timestamp

This makes sure that the userspace correctly interprets the end
of the vsync timestamp.

Change-Id: I66f9939658b6fb7531468429c1ca3e551a4a285c
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
mdss: Notify userspace of changes to blank status

Allow userspace to poll on the blank event to avoid triggering
unnecessary updates, such as when shutting down the device.

CRs-Fixed: 627814
Change-Id: I36bb7845edba14ba0b0ddbe43eaf3d386af2d5f1
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
msm: camera: Exit gracefully while camera daemon crashes

Add camera daemon shutdown handling in all camera
sub devices to exit camera gracefully and it helps
to restart camera.

Change-Id: I39643a16f100b873275efe3a0c6184fe54e52830
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>
msm: camera_v2: Don't touch CCI if camera daemon crashed.

If daemon crashes, refrain from writing to the CCI. This is needed
because these writes will not wait in a process crash scenario and can
potentially leave the CCI in a bad state.

Change-Id: I785cb4af8dc3893b8a7f11e1d1c2a2e1ad775665
Signed-off-by: Satyavaraprasad Yerramsetti <satyav@codeaurora.org>
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>
msm: camera2: cpp: Set exact size for firmware loading.

The poll reads after during and after firmware loading fails.
This is because the exact size of firmware changes with the
version of the firmware. This change uses the firmware size
based on actual firmware file being loaded.

Bug: 10577806
Change-Id: I949954347a48d0b388b11b3c81fd5d1a4627cbf7
Signed-off-by: Rajakumar Govindaram <rajakuma@codeaurora.org>
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>
(cherry picked from commit 48219c02786bae8216833022fceee3079f5c2755)
msm: camera: return -EIO if daemon hasn't fully launched

Media server depends on camera daemon to be fully launched
to be able to get camera info. Return -EIO if daemon hasn't
subscribed to v4l2 device node. This gives HAL opportunity
to try again.

Bug: 10577806
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>
(cherry picked from commit d562b2f9774d9251068dbded5ad15a1c7407824f)

Change-Id: Iebc51c8e56352e02ef5f0554c9eb5ac2bf629595
msm: camera: Do not ignore ERESTARTSYS return from wait function

By ignoring ERESTARTSYS return from wait function, the thread
could potentially hold up the freezing of the task for a long
time, causing battery drain.

Bug: 10577806
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>
Change-Id: I653c06c6bf41b07c811d6bab33e3c839460f45b6
(cherry picked from commit db69933cd572bb7f6fc6ede66175dc4adfdd8217)