kernel.git/sound/core/rawmidi.c, branch linux-3.7.y

ALSA: Avoid endless sleep after disconnect

2012-10-30T10:07:15Z

When disconnect callback is called, each component should wake up sleepers and check card->shutdown flag for avoiding the endless sleep blocking the proper resource release. Cc: Signed-off-by: Takashi Iwai

ALSA: Add a reference counter to card instance

2012-10-30T10:07:10Z

For more strict protection for wild disconnections, a refcount is introduced to the card instance, and let it up/down when an object is referred via snd_lookup_*() in the open ops. The free-after-last-close check is also changed to check this refcount instead of the empty list, too. Reported-by: Matthieu CASTET Cc: Signed-off-by: Takashi Iwai

sound: fix drivers needing module.h not moduleparam.h

2011-10-31T23:31:19Z

The implicit presence of module.h lured several users into incorrectly thinking that they only needed/used modparam.h but once we clean up the module.h presence, these will show up as build failures, so fix 'em now. Signed-off-by: Paul Gortmaker

ALSA: Use krealloc() in possible places

2011-07-12T06:05:16Z

Signed-off-by: Takashi Iwai

ALSA: rawmidi - Use workq for event handling

2011-06-14T12:37:06Z

Kill tasklet usage in rawmidi core code. Use workq for the event callback instead of tasklet (which is used only in core/seq/seq_midi.c). Signed-off-by: Takashi Iwai

ALSA: rawmidi: fix oops (use after free) when unloading a driver module

2010-10-17T08:11:40Z

When a driver module is unloaded and the last still open file is a raw MIDI device, the card and its devices will be actually freed in the snd_card_file_remove() call when that file is closed. Afterwards, rmidi and rmidi->card point into freed memory, so the module pointer is likely to be garbage. (This was introduced by commit 9a1b64caac82aa02cb74587ffc798e6f42c6170a.) Signed-off-by: Clemens Ladisch Reported-by: Krzysztof Foltman Cc: 2.6.30-2.6.35 Signed-off-by: Takashi Iwai

ALSA: rawmidi: fix the get next midi device ioctl

2010-09-09T07:05:21Z

If we pass in a device which is higher than SNDRV_RAWMIDI_DEVICES then the "next device" should be -1. This function just returns device + 1. But the main thing is that "device + 1" can lead to a (harmless) integer overflow and that annoys static analysis tools. [fix the case for device == SNDRV_RAWMIDI_DEVICE by tiwai] Signed-off-by: Dan Carpenter Signed-off-by: Takashi Iwai

ALSA: core - Define llseek fops

2010-04-13T10:01:21Z

Set no_llseek to llseek file ops of each sound component (but for hwdep). This avoids the implicit BKL invocation via generic_file_llseek() used as default when fops.llseek is NULL. Also call nonseekable_open() at each open ops to ensure the file flags have no seek bit. Signed-off-by: Takashi Iwai

vfs: Implement proper O_SYNC semantics

2009-12-10T14:02:50Z

While Linux provided an O_SYNC flag basically since day 1, it took until Linux 2.4.0-test12pre2 to actually get it implemented for filesystems, since that day we had generic_osync_around with only minor changes and the great "For now, when the user asks for O_SYNC, we'll actually give O_DSYNC" comment. This patch intends to actually give us real O_SYNC semantics in addition to the O_DSYNC semantics. After Jan's O_SYNC patches which are required before this patch it's actually surprisingly simple, we just need to figure out when to set the datasync flag to vfs_fsync_range and when not. This patch renames the existing O_SYNC flag to O_DSYNC while keeping it's numerical value to keep binary compatibility, and adds a new real O_SYNC flag. To guarantee backwards compatiblity it is defined as expanding to both the O_DSYNC and the new additional binary flag (__O_SYNC) to make sure we are backwards-compatible when compiled against the new headers. This also means that all places that don't care about the differences can just check O_DSYNC and get the right behaviour for O_SYNC, too - only places that actuall care need to check __O_SYNC in addition. Drivers and network filesystems have been updated in a fail safe way to always do the full sync magic if O_DSYNC is set. The few places setting O_SYNC for lower layers are kept that way for now to stay failsafe. We enforce that O_DSYNC is set when __O_SYNC is set early in the open path to make sure we always get these sane options. Note that parisc really screwed up their headers as they already define a O_DSYNC that has always been a no-op. We try to repair it by using it for the new O_DSYNC and redefinining O_SYNC to send both the traditional O_SYNC numerical value _and_ the O_DSYNC one. Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Grant Grundler Cc: "David S. Miller" Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Thomas Gleixner Cc: Al Viro Cc: Andreas Dilger Acked-by: Trond Myklebust Acked-by: Kyle McMartin Acked-by: Ulrich Drepper Signed-off-by: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Jan Kara

sound: rawmidi: record a substream's owner process

2009-11-10T15:32:38Z

Record the pid of the task that opened a RawMIDI substream. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai