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Takashi Sakamoto
aea3493246
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 commit71c3797779("ALSA: firewire-motu: add hwdep interface"), and persisted when POLLOUT was updated to EPOLLOUT by a commita9a08845e9('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>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.