[PATCH 4/10] fuse: add O_NONBLOCK support to FUSE device

[Miklos Szeredi <miklos@szeredi.hu>]

From: Jeff Dike <jdike@addtoit.com>

I don't like duplicating the connected and list_empty tests in
fuse_dev_readv, but this seemed cleaner than adding the f_flags test
to request_wait.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>

Index: linux/fs/fuse/dev.c
===================================================================
--- linux.orig/fs/fuse/dev.c	2006-03-31 18:55:31.000000000 +0200
+++ linux/fs/fuse/dev.c	2006-03-31 18:55:31.000000000 +0200
@@ -619,6 +619,12 @@ static ssize_t fuse_dev_readv(struct fil
 	err = -EPERM;
 	if (!fc)
 		goto err_unlock;
+
+	err = -EAGAIN;
+	if((file->f_flags & O_NONBLOCK) && fc->connected &&
+	   list_empty(&fc->pending))
+		goto err_unlock;
+
 	request_wait(fc);
 	err = -ENODEV;
 	if (!fc->connected)
-
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