Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fixed the race among multiple threads accessing the OSS PCM
instance concurrently by simply introducing a mutex for protecting
a setup of the PCM.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

Fix hang-up at disconnection of usb-audio devices while accessing PCM.
Don't handle PCM operations any more after shutdown flag is set.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

Orignally proposed by Sam Revitch <sam.revitch@gmail.com>.
Unregister device files at disconnection to avoid the futher accesses.
Also, the dev_unregister callback is removed and replaced with the
combination of disconnect + free.
A new function snd_card_free_when_closed() is introduced, which is
used in USB disconnect callback.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

- Add the linked list to each proc entry to enable a single-shot
  disconnection (unregister)
- Deprecate snd_info_unregister(), use snd_info_free_entry()
- Removed NULL checks of snd_info_free_entry()
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

Accept O_RDWR at opening a PCM OSS device that is read- or write-only,
just for the compatibility with the behavior of older versions.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

Removed zero-initializations of static variables.
A tiny optimization.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Move mmap_count to snd_pcm_substream instead of runtime struct
so that multiplly opened substreams via O_APPEND can be handled
correctly.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added O_APPEND flag support to PCM to enable shared substreams
among multiple processes.  This mechanism is used by dmix and
dsnoop plugins.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Remove unneeded read/write_size fields in proc text ops.
snd_info_set_text_ops() is fixed, too.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Move EXPORT_SYMBOL()s to places adjacent to functions/variables.
Also move OSS-specific hw_params helper functions to pcm_oss.c.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Fixed Oops at rmmod with CONFIG_SND_VERBOSE_PROCFS=n.
Add ifdef to struct fields for optimization and better compile
checks.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Handle the error returned from snd_pcm_oss_get_formats() correctly
in SNDCTL_DSP_SETFMT ioctl handler of PCM OSS emulation.
Signed-off-by: NSteven Finney <sfinney@healthhero.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Modules: PCM Midlevel,ALSA<-OSS emulation

Fix Oops of PCM OSS emulation occuring when multiple playback is used.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Modules: ALSA<-OSS emulation

Fix Oops due to a typo in snd_pcm_oss.c.
Signed-off-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

- Fix possible race of referring the setup hook from the running PCM
- Fix memory leak in an error path of proc write
- Clean up the setup hook parser
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

- Clean up initialization and destruction of substream instance
  Now snd_pcm_open_substream() alone does most initialization jobs.
  Add pcm_release callback for cleaning up at snd_pcm_release_substream()
- Tidy up PCM oss code
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

- Make snd_pcm_prepare() static
- Clean up snd_pcm_kernel_*_ioctl() functions, reduce exports
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Modules: ALSA Core,PCM Midlevel,ALSA<-OSS emulation,USB generic driver

1) The verbose procfs code for the PCM midlevel and usb audio
   can be removed now (more patches will follow).
   CONFIG_SND_VERBOSE_PROCFS
2) The PCM OSS plugin system can be also compiled optionaly.
   CONFIG_SND_PCM_OSS_PLUGINS
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.
Modified-by: NIngo Molnar <mingo@elte.hu>

(finished the conversion)
Signed-off-by: NJes Sorensen <jes@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Modules: ALSA<-OSS emulation,ALSA sequencer,ALSA<-OSS sequencer

Optimize the code when compiled without CONFIG_PROC_FS (in seq and oss
emulation parts).
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Instead of storing the pointers to the device-specific structures in an
array, put them into the struct snd_minor, and look them up dynamically.

This makes the device type modules independent of the minor number
encoding.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

Instead of a comment string, store the device type in the snd_minor
structure.  This makes snd_minor more flexible, and has the nice side
effect that we don't need anymore to create a separate snd_minor
template for registering a device but can pass the file_operations
directly to snd_register_device().
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

Modules: ALSA<-OSS emulation

Remove xxx_t typedefs from the core PCM OSS-emulation codes.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Modules: ALSA<-OSS emulation,USB generic driver,USB USX2Y

Added missing KERN_* prefix to printk.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Modules: ALSA Core,ALSA<-OSS emulation

Remove a global function snd_task_name(), and move it local
to snd-pcm-oss module.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Control Midlevel,ALSA Core,HWDEP Midlevel,PCM Midlevel,RawMidi Midlevel
Timer Midlevel,ALSA<-OSS emulation
Replace kcalloc(1,..) with kzalloc().
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Documentation,ALSA<-OSS emulation
Added 'buggy-ptr' proc option to switch the behavior of GETOPTR ioctl.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

ALSA Core,RawMidi Midlevel,ALSA<-OSS emulation,ALSA sequencer
RME32 driver,RME96 driver,EMU10K1/EMU10K2 driver,NM256 driver
Add sparse annotations where we do strange this with __iomem/__user
pointers.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

PCM Midlevel,ALSA<-OSS emulation,USB USX2Y
This patch removes open_flag from struct _snd_pcm_substream.
All of its uses are substituted by querying struct _snd_pcm_substream's
member ffile instead.
Signed-off-by: NKarsten Wiese <annabellesgarden@yahoo.de>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This patch creates a new kstrdup library function and changes the "local"
implementations in several places to use this function.

Most of the changes come from the sound and net subsystems.  The sound part
had already been acknowledged by Takashi Iwai and the net part by David S.
Miller.

I left UML alone for now because I would need more time to read the code
carefully before making changes there.
Signed-off-by: NPaulo Marques <pmarques@grupopie.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

ALSA<-OSS emulation
The problem was negative/wrong result (info.bytes) in a specific condition at
playback startup.
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

ALSA<-OSS emulation
The problem was negative result (info.bytes) in a specific condition at
playback startup.
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

ALSA<-OSS emulation
Fix the division with int64 for 32bit architectures.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

ALSA<-OSS emulation
Use 'long' for byte counters in snd_pcm_oss_bytes() snd_pcm_alsa_bytes().
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

ALSA<-OSS emulation
Added bytes variable and do not use the frames argument as a temporaly
storage for the byte counter.
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

ALSA<-OSS emulation
This reverts the last patch which wrongly mixes bytes and frames.
The real culprit might be the 32-bit overflow, so the return expression uses
64-bit values now in snd_pcm_oss_bytes().
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

ALSA<-OSS emulation
This patch changes snd_pcm_oss_bytes() by adding a local variable
for the frames -> bytes conversion, which means that the frame count
is no longer corrupted by this conversion.
Signed-off-by: NRoger Mach <bigmach@us.ibm.com>
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

ALSA<-OSS emulation
Fix the noisy capture on some hardwares over OSS emulation.
Change back to avail_min = period_size for capture direction.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>