linux-stable/sound/core/seq
Adam Goode 27423257b7 ALSA: seq: Continue broadcasting events to ports if one of them fails
Sometimes PORT_EXIT messages are lost when a process is exiting.
This happens if you subscribe to the announce port with client A,
then subscribe to the announce port with client B, then kill client A.
Client B will not see the PORT_EXIT message because client A's port is
closing and is earlier in the announce port subscription list. The
for each loop will try to send the announcement to client A and fail,
then will stop trying to broadcast to other ports. Killing B works fine
since the announcement will already have gone to A. The CLIENT_EXIT
message does not get lost.

How to reproduce problem:

*** termA
$ aseqdump -p 0:1
  0:1   Port subscribed            0:1 -> 128:0

*** termB
$ aseqdump -p 0:1

*** termA
  0:1   Client start               client 129
  0:1   Port start                 129:0
  0:1   Port subscribed            0:1 -> 129:0

*** termB
  0:1   Port subscribed            0:1 -> 129:0

*** termA
^C

*** termB
  0:1   Client exit                client 128
   <--- expected Port exit as well (before client exit)

Signed-off-by: Adam Goode <agoode@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-06-04 17:30:58 +02:00
..
oss ALSA: seq_oss: Use standard printk helpers 2014-02-14 08:14:18 +01:00
Kconfig ALSA: clean up the logic for building sequencer modules 2009-05-29 11:49:42 +02:00
Makefile ALSA: OSS sequencer should be initialized after snd_seq_system_client_init 2009-07-19 19:10:01 +02:00
seq.c device.h: cleanup users outside of linux/include (C files) 2012-03-11 14:27:37 -04:00
seq_clientmgr.c ALSA: seq: Continue broadcasting events to ports if one of them fails 2014-06-04 17:30:58 +02:00
seq_clientmgr.h [ALSA] sound/core/seq: move declarations of globally visible variables to proper headers 2008-01-31 17:29:35 +01:00
seq_compat.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
seq_device.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_dummy.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_fifo.c ALSA: seq: correctly detect input buffer overflow 2014-06-04 07:12:12 +02:00
seq_fifo.h
seq_info.c sound: Add export.h for THIS_MODULE/EXPORT_SYMBOL where needed 2011-10-31 19:31:22 -04:00
seq_info.h
seq_lock.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_lock.h
seq_memory.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_memory.h ALSA: core: sparse cleanups 2011-02-14 17:10:11 +01:00
seq_midi.c ALSA: core: Fix format string mismatch in seq_midi.c 2014-04-28 12:18:47 +02:00
seq_midi_emul.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_midi_event.c sound: Add module.h to the previously silent sound users 2011-10-31 19:31:21 -04:00
seq_ports.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_ports.h
seq_prioq.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_prioq.h
seq_queue.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_queue.h [ALSA] semaphore -> mutex (core part) 2006-03-22 10:24:50 +01:00
seq_system.c sound: Add export.h for THIS_MODULE/EXPORT_SYMBOL where needed 2011-10-31 19:31:22 -04:00
seq_system.h
seq_timer.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00
seq_timer.h [ALSA] sound/core/seq: move declarations of globally visible variables to proper headers 2008-01-31 17:29:35 +01:00
seq_virmidi.c ALSA: seq: Use standard printk helpers 2014-02-14 08:14:18 +01:00