Eric Lee / smarc-fsl-linux-kernel

19 Nov, 2011

1 commit

01 Nov, 2011

1 commit

16 Mar, 2011

1 commit

10 Mar, 2011

6 commits

26 Feb, 2011

5 commits

20 Oct, 2010

1 commit

14 Oct, 2010

1 commit

  • b3d625538   Phonet: 'connect' socket implementation for Pipe controller ... Browse Code »

    Based on suggestion by Rémi Denis-Courmont to implement 'connect'
    for Pipe controller logic, this patch implements 'connect' socket
    call for the Pipe controller logic.
    The patch does following:-
    - Removes setsockopts for PNPIPE_CREATE and PNPIPE_DESTROY
    - Adds setsockopt for setting the Pipe handle value
    - Implements connect socket call
    - Updates the Pipe controller logic

    User-space should now follow below sequence with Pipe controller:-
    -socket
    -bind
    -setsockopt for PNPIPE_PIPE_HANDLE
    -connect
    -setsockopt for PNPIPE_ENCAP_IP
    -setsockopt for PNPIPE_ENABLE

    GPRS/3G data has been tested working fine with this.

    Signed-off-by: Kumar Sanghvi
    Acked-by: Rémi Denis-Courmont
    Signed-off-by: David S. Miller

    Kumar Sanghvi
     

09 Oct, 2010

1 commit

  • 03789f267   Phonet: cleanup pipe enable socket option ... Browse Code »

    The current code works like this:

    int garbage, status;
    socklen_t len = sizeof(status);

    /* enable pipe */
    setsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &garbage, sizeof(garbage));
    /* disable pipe */
    setsockopt(fd, SOL_PNPIPE, PNPIPE_DISABLE, &garbage, sizeof(garbage));
    /* get status */
    getsockopt(fd, SOL_PNPIPE, PNPIPE_INQ, &status, &len);

    ...which does not follow the usual socket option pattern. This patch
    merges all three "options" into a single gettable&settable option,
    before Linux 2.6.37 gets out:

    int status;
    socklen_t len = sizeof(status);

    /* enable pipe */
    status = 1;
    setsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &status, sizeof(status));
    /* disable pipe */
    status = 0;
    setsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &status, sizeof(status));
    /* get status */
    getsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &status, &len);

    This also fixes the error code from EFAULT to ENOTCONN.

    Signed-off-by: Rémi Denis-Courmont
    Cc: Kumar Sanghvi
    Signed-off-by: David S. Miller

    Rémi Denis-Courmont
     

05 Oct, 2010

1 commit

01 Oct, 2010

1 commit

  • e1a5964f0   Phonet: restore flow control credits when sending fails ... Browse Code »

    This patch restores the below flow control patch submitted by Rémi
    Denis-Courmont, which accidentaly got lost due to Pipe controller patch
    on Phonet.

    commit 1a98214feef2221cd7c24b17cd688a5a9d85b2ea
    Author: Rémi Denis-Courmont
    Date: Mon Aug 30 12:57:03 2010 +0000

    Phonet: restore flow control credits when sending fails

    Signed-off-by: Rémi Denis-Courmont
    Signed-off-by: David S. Miller

    Signed-off-by: Kumar Sanghvi
    Acked-by: Linus Walleij
    Signed-off-by: David S. Miller

    Rémi Denis-Courmont
     

30 Sep, 2010

1 commit

  • a91e7d471   Phonet: Correct header retrieval after pskb_may_pull ... Browse Code »

    Retrieve the header after doing pskb_may_pull since, pskb_may_pull
    could change the buffer structure.

    This is based on the comment given by Eric Dumazet on Phonet
    Pipe controller patch for a similar problem.

    Signed-off-by: Kumar Sanghvi
    Acked-by: Linus Walleij
    Acked-by: Eric Dumazet
    Acked-by: Rémi Denis-Courmont
    Signed-off-by: David S. Miller

    Kumar Sanghvi
     

28 Sep, 2010

1 commit

  • 8d98efa84   Phonet: Implement Pipe Controller to support Nokia Slim Modems ... Browse Code »

    Phonet stack assumes the presence of Pipe Controller, either in Modem or
    on Application Processing Engine user-space for the Pipe data.
    Nokia Slim Modems like WG2.5 used in ST-Ericsson U8500 platform do not
    implement Pipe controller in them.
    This patch adds Pipe Controller implemenation to Phonet stack to support
    Pipe data over Phonet stack for Nokia Slim Modems.

    Signed-off-by: Kumar Sanghvi
    Acked-by: Linus Walleij
    Signed-off-by: David S. Miller

    Kumar Sanghvi
     

16 Sep, 2010

1 commit

  • 6482f554e   Phonet: remove dangling pipe if an endpoint is closed early ... Browse Code »

    Closing a pipe endpoint is not normally allowed by the Phonet pipe,
    other than as a side after-effect of removing the pipe between two
    endpoints. But there is no way to prevent Linux userspace processes
    from being killed or suffering from bugs, so this can still happen.
    We might as well forcefully close Phonet pipe endpoints then.

    The cellular modem supports only a few existing pipes at a time. So we
    really should not leak them. This change instructs the modem to destroy
    the pipe if either of the pipe's endpoint (Linux socket) is closed too
    early.

    Signed-off-by: Rémi Denis-Courmont
    Signed-off-by: David S. Miller

    Rémi Denis-Courmont
     

01 Sep, 2010

2 commits

09 Jul, 2010

1 commit

29 May, 2010

1 commit

26 May, 2010

1 commit

02 May, 2010

1 commit

  • 438154823   net: sock_def_readable() and friends RCU conversion ... Browse Code »

    sk_callback_lock rwlock actually protects sk->sk_sleep pointer, so we
    need two atomic operations (and associated dirtying) per incoming
    packet.

    RCU conversion is pretty much needed :

    1) Add a new structure, called "struct socket_wq" to hold all fields
    that will need rcu_read_lock() protection (currently: a
    wait_queue_head_t and a struct fasync_struct pointer).

    [Future patch will add a list anchor for wakeup coalescing]

    2) Attach one of such structure to each "struct socket" created in
    sock_alloc_inode().

    3) Respect RCU grace period when freeing a "struct socket_wq"

    4) Change sk_sleep pointer in "struct sock" by sk_wq, pointer to "struct
    socket_wq"

    5) Change sk_sleep() function to use new sk->sk_wq instead of
    sk->sk_sleep

    6) Change sk_has_sleeper() to wq_has_sleeper() that must be used inside
    a rcu_read_lock() section.

    7) Change all sk_has_sleeper() callers to :
    - Use rcu_read_lock() instead of read_lock(&sk->sk_callback_lock)
    - Use wq_has_sleeper() to eventually wakeup tasks.
    - Use rcu_read_unlock() instead of read_unlock(&sk->sk_callback_lock)

    8) sock_wake_async() is modified to use rcu protection as well.

    9) Exceptions :
    macvtap, drivers/net/tun.c, af_unix use integrated "struct socket_wq"
    instead of dynamically allocated ones. They dont need rcu freeing.

    Some cleanups or followups are probably needed, (possible
    sk_callback_lock conversion to a spinlock for example...).

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

07 Jan, 2010

3 commits

30 Nov, 2009

1 commit

11 Nov, 2009

1 commit

15 Oct, 2009

1 commit

  • 766e9037c   net: sk_drops consolidation ... Browse Code »

    sock_queue_rcv_skb() can update sk_drops itself, removing need for
    callers to take care of it. This is more consistent since
    sock_queue_rcv_skb() also reads sk_drops when queueing a skb.

    This adds sk_drops managment to many protocols that not cared yet.

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

01 Oct, 2009

1 commit

  • b7058842c   net: Make setsockopt() optlen be unsigned. ... Browse Code »

    This provides safety against negative optlen at the type
    level instead of depending upon (sometimes non-trivial)
    checks against this sprinkled all over the the place, in
    each and every implementation.

    Based upon work done by Arjan van de Ven and feedback
    from Linus Torvalds.

    Signed-off-by: David S. Miller

    David S. Miller
     

24 Jul, 2009

1 commit

09 Jun, 2009

1 commit

11 Feb, 2009

1 commit

18 Dec, 2008

1 commit