From: Brian Foster <bfoster@redhat.com>
Date: Thu, 30 May 2013 19:35:50 +0000 (-0400)
Subject: fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests
X-Git-Tag: v3.10-rc5~30^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9ecf989cc7626e9edf8abef79f64b909542129b;p=pandora-kernel.git

fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests

If request submission fails for an async request (i.e.,
get_user_pages() returns -ERESTARTSYS), we currently skip the
-EIOCBQUEUED return and drop into wait_for_sync_kiocb() forever.

Avoid this by always returning -EIOCBQUEUED for async requests. If
an error occurs, the error is passed into fuse_aio_complete(),
returned via aio_complete() and thus propagated to userspace via
io_getevents().

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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