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linux/sound/firewire
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Takashi Sakamoto aea3493246 ALSA: firewire-motu: drop EPOLLOUT from poll return values as write is not supported 
The ALSA HwDep character device of the firewire-motu driver incorrectly
returns EPOLLOUT in poll(2), even though the driver implements no operation
for write(2). This misleads userspace applications to believe write() is
allowed, potentially resulting in unnecessarily wakeups.

This issue dates back to the driver's initial code added by a commit
71c3797779 ("ALSA: firewire-motu: add hwdep interface"), and persisted
when POLLOUT was updated to EPOLLOUT by a commit a9a08845e9 ('vfs: do
bulk POLL* -> EPOLL* replacement("").').

This commit fixes the bug.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://patch.msgid.link/20250829233749.366222-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2025-08-30 09:32:45 +02:00
..
bebob ALSA: firewire: bebob: Use safer strscpy() instead of strcpy() 2025-07-11 09:52:13 +02:00
dice ALSA: firewire: dice: Use safer strscpy() instead of strcpy() 2025-07-11 09:52:27 +02:00
digi00x ALSA: firewire: digi00x: Use safer strscpy() instead of strcpy() 2025-07-11 09:52:34 +02:00
fireface ALSA: firewire: fireface: Use safer strscpy() instead of strcpy() 2025-07-11 09:52:40 +02:00
fireworks ALSA: firewire: fireworks: Use safer strscpy() instead of strcpy() 2025-07-11 09:52:45 +02:00
motu ALSA: firewire-motu: drop EPOLLOUT from poll return values as write is not supported 2025-08-30 09:32:45 +02:00
oxfw ALSA: firewire: oxfw: Use safer strscpy() instead of strcpy() 2025-07-11 09:53:03 +02:00
tascam ALSA: firewire: tascam: Use safer strscpy() instead of strcpy() 2025-07-11 09:53:08 +02:00
amdtp-am824.c
amdtp-am824.h
amdtp-stream-trace.h
amdtp-stream.c ALSA: firewire-lib: Avoid division by zero in apply_constraint_to_size() 2024-10-21 09:09:21 +02:00
amdtp-stream.h
cmp.c ALSA: firewire: Remove unused cmp_connection_update 2024-10-10 14:22:01 +02:00
cmp.h ALSA: firewire: Remove unused cmp_connection_update 2024-10-10 14:22:01 +02:00
fcp.c
fcp.h
isight.c ALSA: firewire: isight: Use safer strscpy() instead of strcpy() 2025-07-11 09:52:51 +02:00
iso-resources.c
iso-resources.h
Kconfig
lib.c
lib.h
Makefile
packets-buffer.c
packets-buffer.h