[RESEND PATCH v9 06/14] iomap: Return -EAGAIN from iomap_write_iter()

From: Stefan Roesch <shr@fb.com>
To: <io-uring@vger.kernel.org>, <kernel-team@fb.com>,
	<linux-mm@kvack.org>, <linux-xfs@vger.kernel.org>,
	<linux-fsdevel@vger.kernel.org>
Cc: <shr@fb.com>, <david@fromorbit.com>, <jack@suse.cz>,
	<hch@infradead.org>, <axboe@kernel.dk>, <willy@infradead.org>
Subject: [RESEND PATCH v9 06/14] iomap: Return -EAGAIN from iomap_write_iter()
Date: Thu, 23 Jun 2022 10:51:49 -0700	[thread overview]
Message-ID: <20220623175157.1715274-7-shr@fb.com> (raw)
In-Reply-To: <20220623175157.1715274-1-shr@fb.com>

If iomap_write_iter() encounters -EAGAIN, return -EAGAIN to the caller.

Signed-off-by: Stefan Roesch <shr@fb.com>
---
 fs/iomap/buffered-io.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 83cf093fcb92..f2e36240079f 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -830,7 +830,13 @@ static loff_t iomap_write_iter(struct iomap_iter *iter, struct iov_iter *i)
 		length -= status;
 	} while (iov_iter_count(i) && length);
 
-	return written ? written : status;
+	if (status == -EAGAIN) {
+		iov_iter_revert(i, written);
+		return -EAGAIN;
+	}
+	if (written)
+		return written;
+	return status;
 }
 
 ssize_t
-- 
2.30.2

