hello,

my name is ilya, i am a kernel newbie, and  i just
joined the list in hopes of getting some insight on
linux device driver development.

i am writing a kernel-mode driver for a pci card and
i need a mechanism to control the device via user-space
application. at first i had an additional character driver
initialized along with my driver and using fread/fwrite
i would transfer info back and forth. then i found out
about sysfs, so now i am using files in sysfs to
send "commands" to the driver and receive data back.

i have a feeling, however, that i am abusing this method.
what is the appropriate way of setting this up? is there
a way for the module to notify an application of some
event happening? because right now i do this by
constantly reading from one of the files in sysfs until
the value it holds changes. i also know that reading
files from kernel-mode is not a good thing, but i want
to implement something of a config file that can be
modified from user-space but would be read in by
the module. what is the best way of doing this?

any info is much appreciated.

-- ilya

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