netdev - [PATCH RFC 2/4] aio: prefer aio_op op over iter

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Message-ID: <20150311224618.23777.38330.stgit@tstruk-mobl1>
Date:	Wed, 11 Mar 2015 15:46:18 -0700
From:	Tadeusz Struk <tadeusz.struk@...el.com>
To:	davem@...emloft.net
Cc:	linux-aio@...ck.org, herbert@...dor.apana.org.au,
	netdev@...r.kernel.org, ying.xue@...driver.com, bcrl@...ck.org,
	viro@...IV.linux.org.uk, linux-fsdevel@...r.kernel.org, hch@....de,
	linux-crypto@...r.kernel.org
Subject: [PATCH RFC 2/4] aio: prefer aio_op op over iter_op

AIO interface should prefer AIO operations over iter_op

Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>
---
 fs/aio.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index f8e52a1..389f4dd 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1449,11 +1449,15 @@ rw_common:
 		if (rw == WRITE)
 			file_start_write(file);
 
-		if (iter_op) {
+		if (rw_op) {
+			ret = rw_op(req, iovec, nr_segs, req->ki_pos);
+		} else if (iter_op) {
 			iov_iter_init(&iter, rw, iovec, nr_segs, req->ki_nbytes);
 			ret = iter_op(req, &iter);
 		} else {
-			ret = rw_op(req, iovec, nr_segs, req->ki_pos);
+			if (iovec != inline_vecs)
+				kfree(iovec);
+			return -EINVAL;
 		}
 
 		if (rw == WRITE)

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