19 Dec, 2011

1 commit

  • module_param(bool) used to counter-intuitively take an int. In
    fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
    trick.

    It's time to remove the int/unsigned int option. For this version
    it'll simply give a warning, but it'll break next kernel version.

    Signed-off-by: Rusty Russell
    Signed-off-by: Takashi Iwai

    Rusty Russell
     

06 Dec, 2011

1 commit

  • The advantage of kcalloc is, that will prevent integer overflows which could
    result from the multiplication of number of elements and size and it is also
    a bit nicer to read.

    The semantic patch that makes this change is available
    in https://lkml.org/lkml/2011/11/25/107

    Signed-off-by: Thomas Meyer
    Signed-off-by: Takashi Iwai

    Thomas Meyer
     

01 Nov, 2011

1 commit


24 Aug, 2011

1 commit

  • There are references in the code to 256 sources, so I tested it with 256 aplays,
    of which the first and last with real data and the rest playing /dev/zero .

    Also increase amount of page tables, so the default aplay size works.

    Signed-off-by: Maarten Lankhorst
    Signed-off-by: Takashi Iwai

    Maarten Lankhorst
     

16 Jun, 2011

1 commit


14 Jun, 2011

3 commits


10 Jun, 2011

2 commits

  • The name argument of request_irq() appears in /proc/interrupts, and
    it's quite ugly when the name entry contains a space or special letters.
    In general, it's simpler and more readable when the module name appears
    there, so let's replace all entries with KBUILD_MODNAME.

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     
  • The convention for pci_driver.name entry in kernel drivers seem to be
    the module name or equivalent ones. But, so far, almost all PCI sound
    drivers use more verbose name like "ABC Xyz (12)", and these are fairly
    confusing when appearing as a file name.

    This patch converts the all pci_driver.name entries in sound/pci/* to
    use KBUILD_MODNAME for more unified appearance.

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

31 Mar, 2011

1 commit


16 Mar, 2011

1 commit


14 Mar, 2011

4 commits


11 Nov, 2010

1 commit

  • In each function, the value apcm is stored in the private_data field of
    runtime. At the same time the function ct_atc_pcm_free_substream is stored
    in the private_free field of the same structure. ct_atc_pcm_free_substream
    dereferences and ultimately frees the value in the private_data field. But
    each function can exit in an error case with apcm having been freed, in
    which case a subsequent call to the private_free function would perform a
    dereference after free. On the other hand, if the private_free field is
    not initialized, it is NULL, and not invoked (see snd_pcm_detach_substream
    in sound/core/pcm.c). To avoid the introduction of a dangling pointer, the
    initializations of the private_data and private_free fields are moved to
    the end of the function, past any possible free of apcm. This is safe
    because the previous calls to snd_pcm_hw_constraint_integer and
    snd_pcm_hw_constraint_minmax, which take runtime as an argument, do not
    refer to either of these fields.

    In each function, there is one error case where apcm needs to be freed, and
    a call to kfree is added.

    The sematic match that finds this problem is as follows:
    (http://coccinelle.lip6.fr/)

    //
    @@
    expression e,e1,e2,e3;
    identifier f,free1,free2;
    expression a;
    @@

    *e->f = a
    ... when != e->f = e1
    when any
    if (...) {
    ... when != free1(...,e,...)
    when != e->f = e2
    * kfree(a)
    ... when != free2(...,e,...)
    when != e->f = e3
    }
    //

    Signed-off-by: Julia Lawall
    Signed-off-by: Takashi Iwai

    Julia Lawall
     

30 Mar, 2010

1 commit

  • …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
     

16 Feb, 2010

1 commit


09 Feb, 2010

1 commit


05 Feb, 2010

1 commit

  • After hours of debugging, I finally found the reason why some source
    and runtime combination does not work. The PTP (page table pages)
    address must be aligned. I am not sure how much, but alignment to
    PAGE_SIZE is sufficient. Also, use ALSA's page allocation routines
    to ensure proper virtual -> physical address translation.

    Cc:
    Signed-off-by: Jaroslav Kysela

    Jaroslav Kysela
     

14 Jan, 2010

1 commit


01 Nov, 2009

1 commit


30 Oct, 2009

1 commit

  • The variables are unsigned so the test `>= 0' is always true,
    the `< 0' test always fails. In these cases the other part of
    the test catches wrapped values.

    In dac_audio_write() there does not occur a test for wrapped
    values, but the test appears redundant.

    Signed-off-by: Roel Kluin
    Signed-off-by: Takashi Iwai

    Roel Kluin
     

02 Oct, 2009

1 commit

  • On Soundblaster X-FI Titenium with emu20k2 the SIDE and SURROUND mute
    functions are swapped.
    It was checked with 'speaker-test -c 8 -s 3' and (un)mute surround or
    'speaker-test -c 8 -s 7' and (un)mute side. The volume seems not
    to be affected and works as expected.

    Signed-off-by: Sven Eckelmann
    Signed-off-by: Takashi Iwai

    Sven Eckelmann
     

22 Jul, 2009

3 commits


20 Jul, 2009

3 commits


22 Jun, 2009

2 commits

  • Added the suspend/resume support to ctxfi driver.

    The team tested on the following seems ok:
    AMD Athlon 64 3500+ / ASUS A8N-E / 512MB DDR ATI / Radeon X1300
    20k1 & 20k2 cards

    Signed-off-by: Wai Yew CHAY
    Singed-off-by: Ryan RICHARDS
    Signed-off-by: Takashi Iwai

    Wai Yew CHAY
     
  • Allow unknown PCI SSIDs for emu20k1 and emu20k2 as "unknown" model.
    Also, add a black-list check in case any device has to be listed
    as "unsupported". It has a negative value in the pci quirk entry.

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

15 Jun, 2009

1 commit

  • The PCM x-fi native update routine can cause deadlocks when the
    trigger(START) is called while the stream is running.

    This patch fixes the deadlock by just postponing the pcm period update
    to the next possible wake-up. Also it adds the flip of ti->running
    flag (just to be sure as now).

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

13 Jun, 2009

1 commit

  • The spinlock in atc can cause a sleep in lock:

    Kernel failure message 1:
    BUG: sleeping function called from invalid context at mm/slub.c:1599
    in_atomic(): 0, irqs_disabled(): 1, pid: 2537, name: gstreamer-prope
    Pid: 2537, comm: gstreamer-prope Tainted: P
    2.6.29.4-167.fc11.x86_64 #1
    Call Trace:
    [] __might_sleep+0x10b/0x110
    [] __kmalloc+0x73/0x130
    [] ? daio_rsc_init+0xaa/0x125 [snd_ctxfi]
    [] dao_rsc_init+0x55/0x1c0 [snd_ctxfi]
    [] dao_rsc_reinit+0x55/0x5d [snd_ctxfi]
    [] ? _spin_lock_irqsave+0x32/0x3b
    [] atc_spdif_out_passthru+0x92/0x136 [snd_ctxfi]
    ...

    Since the lock path is no critical path, it can be gracefully
    replaced with a mutex.

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

09 Jun, 2009

5 commits