centos man page for request_firmware

REQUEST_FIRMWARE(9)					   Device drivers infrastructure				       REQUEST_FIRMWARE(9)

NAME
       request_firmware - send firmware request and wait for it

SYNOPSIS
       int request_firmware(const struct firmware ** firmware_p, const char * name, struct device * device);

ARGUMENTS
       firmware_p
	   pointer to firmware image

       name
	   name of firmware file

       device
	   device for which firmware is being loaded

DESCRIPTION
       firmware_p will be used to return a firmware image by the name of name for device device.

       Should be called from user context where sleeping is allowed.

       name will be used as $FIRMWARE in the uevent environment and should be distinctive enough not to be confused with any other firmware image
       for this or any other device.

       Caller must hold the reference count of device.

       The function can be called safely inside device's suspend and resume callback.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       REQUEST_FIRMWARE(9)