Re: can block drivers get non-fs requests?

[Jens Axboe]

On Thu, Aug 14 2008, Pierre Ossman wrote:
> On Thu, 14 Aug 2008 13:42:09 +0200
> Jens Axboe <jens.axboe@xxxxxxxxxx> wrote:
> 
> > 
> > You should check in the driver whether the request type is supported. So
> > if you can only handle fs requests, you should do a check for
> > !blk_fs_request() after elv_next_request() and call
> > end_(de)queued_request() appropriately.
> > 
> 
> So killing off the request with -EOPNOTSUPP is preferred over having a
> prepare function and stopping it there?

Nope, that doesn't matter. If you already have a prep function, using
BLKPREP_KILL is the easiest solution.

-- 
Jens Axboe

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