Ubuntu request_firmware() failed

[Li Wu]

Hi All,

This is my first time to use the Ubuntu kernel email list. If it's not
proper to ask question like this, please instruct me. I will definitely
follow the CODE.

I used the attached sample_driver.c to test kernel call request_firmware(),
it always failed and return error code -2.

My Ubuntu is 12.10

$lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 12.10
Release:    12.10
Codename:    quantal

The test firmware file test.bin is at /lib/firmware,
ls -l /lib/firmware/test.bin
-rw-r--r-- 1 root root 2048 Oct 26 23:55 /lib/firmware/test.bin


dmesg shows the following result:

[ 1971.274811] firmware (null): >_request_firmware_load: device_register
failed
[ 1971.274813] sample_probe_default request_firmware ret = -2


Anyone can instruct me how to make the request_firmware() work?

I googled but none of the solutions provided work for me.

Thanks and looking forward to hear from you.

Regards,

Willy
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