NAME
blk_end_request_callback - Special helper function for tricky drivers
SYNOPSIS
int blk_end_request_callback(struct request * rq, int error, unsigned int nr_bytes, int ()(struct request *) drv_callback);
ARGUMENTS
rq
the request being processed
error
0 for success, < 0 for error
nr_bytes
number of bytes to complete
drv_callback
function called between completion of bios in the request and completion of the request. If the callback returns non 0, this helper returns without completion of the request.
DESCRIPTION
Ends I/O on a number of bytes attached to rq. If rq has leftover, sets it up for the next range of segments.
This special helper function is used only for existing tricky drivers. (e.g. cdrom_newpc_intr of ide-cd) This interface will be removed when such drivers are rewritten. Don´t use this interface in other places anymore.
RETURN
0 - we are done with this request 1 - this request is not freed yet. this request still has pending buffers or the driver doesn´t want to finish this request yet.