end_request — end I/O on the current segment of the request
void end_request ( | struct request * | req, |
| int | uptodate); |
Ends I/O on the current segment of a request. If that is the only remaining segment, the request is also completed and freed.
This is a remnant of how older block drivers handled IO completions.
Modern drivers typically end IO on the full request in one go, unless
they have a residual value to account for. For that case this function
isn't really useful, unless the residual just happens to be the
full current segment. In other words, don't use this function in new
code. Either use end_request_completely, or the
end_that_request_chunk (along with end_that_request_last) for
partial completions.