f09467e06b
As an end user, it can be confusing to request an arbitrary IO port be
used only to find out that it doesn't work without an obvious reason,
especially since /sys/module/snd_ymfpci/parameters/{fm,joystick,mpu}_port
indicate 0 after the module has been loaded.
In my case, I was unaware that the YMF724 did not support such usage, and
thus ended up spending time attempting to debug the issue.
Now, when a user attempts to request an IO port that isn't supported by
the hardware, the following message is printed:
[ 25.549530] snd_ymfpci 0000:06:05.0: The Yamaha DS-1 (YMF724F) does not support arbitrary IO ports for FM (requested 0x1234)
Signed-off-by: Tasos Sahanidis <tasos@tasossah.com>
Link: https://lore.kernel.org/r/20230329034204.171901-1-tasos@tasossah.com
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 Restructured Text 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.