Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

sound: oss: midibuf: fix sleep_on races

Browse source 
sleep_on is known to be racy and going away because of this. All instances
of interruptible_sleep_on and interruptible_sleep_on_timeout in the midibuf
driver can trivially be replaced with wait_event_interruptible and
wait_event_interruptible_timeout.

[fixed coding style warnings by tiwai]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Arnd Bergmann 2014-01-02 13:07:48 +01:00 committed by Takashi Iwai
parent 7bd6972a92
commit 76439c2ac6
1 changed files with 9 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
sound/oss/midibuf.c
View file

@ -86,9 +86,8 @@ static void drain_midi_queue(int dev)
*/ */
if (midi_devs[dev]->buffer_status != NULL) if (midi_devs[dev]->buffer_status != NULL)
while (!signal_pending(current) && midi_devs[dev]->buffer_status(dev)) wait_event_interruptible_timeout(midi_sleeper[dev],
interruptible_sleep_on_timeout(&midi_sleeper[dev], !midi_devs[dev]->buffer_status(dev), HZ/10);
HZ/10);
} }
static void midi_input_intr(int dev, unsigned char data) static void midi_input_intr(int dev, unsigned char data)
@ -233,8 +232,8 @@ void MIDIbuf_release(int dev, struct file *file)
* devices * devices
*/ */
while (!signal_pending(current) && DATA_AVAIL(midi_out_buf[dev])) wait_event_interruptible(midi_sleeper[dev],
interruptible_sleep_on(&midi_sleeper[dev]); !DATA_AVAIL(midi_out_buf[dev]));
/* /*
* Sync * Sync
*/ */
@ -282,8 +281,8 @@ int MIDIbuf_write(int dev, struct file *file, const char __user *buf, int count)
goto out; goto out;
} }
interruptible_sleep_on(&midi_sleeper[dev]); if (wait_event_interruptible(midi_sleeper[dev],
if (signal_pending(current)) SPACE_AVAIL(midi_out_buf[dev])))
{ {
c = -EINTR; c = -EINTR;
goto out; goto out;
@ -325,7 +324,8 @@ int MIDIbuf_read(int dev, struct file *file, char __user *buf, int count)
c = -EAGAIN; c = -EAGAIN;
goto out; goto out;
} }
interruptible_sleep_on_timeout(&input_sleeper[dev], wait_event_interruptible_timeout(input_sleeper[dev],
DATA_AVAIL(midi_in_buf[dev]),
parms[dev].prech_timeout); parms[dev].prech_timeout);
if (signal_pending(current)) if (signal_pending(current))