linux-kernel - [PATCH v4 12/12] virtio: Cleanup alloc

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Message-Id: <20240208184913.484340-13-mathieu.desnoyers@efficios.com>
Date: Thu,  8 Feb 2024 13:49:13 -0500
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: Dan Williams <dan.j.williams@...el.com>,
	Arnd Bergmann <arnd@...db.de>,
	Dave Chinner <david@...morbit.com>
Cc: linux-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Vishal Verma <vishal.l.verma@...el.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Matthew Wilcox <willy@...radead.org>,
	Russell King <linux@...linux.org.uk>,
	linux-arch@...r.kernel.org,
	linux-cxl@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-xfs@...r.kernel.org,
	dm-devel@...ts.linux.dev,
	nvdimm@...ts.linux.dev,
	linux-s390@...r.kernel.org,
	Alasdair Kergon <agk@...hat.com>,
	Mike Snitzer <snitzer@...nel.org>,
	Mikulas Patocka <mpatocka@...hat.com>
Subject: [PATCH v4 12/12] virtio: Cleanup alloc_dax() error handling

Now that alloc_dax() returns ERR_PTR(-EOPNOTSUPP) rather than NULL,
the callers do not have to handle NULL return values anymore.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Alasdair Kergon <agk@...hat.com>
Cc: Mike Snitzer <snitzer@...nel.org>
Cc: Mikulas Patocka <mpatocka@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: Vishal Verma <vishal.l.verma@...el.com>
Cc: Dave Jiang <dave.jiang@...el.com>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Russell King <linux@...linux.org.uk>
Cc: linux-arch@...r.kernel.org
Cc: linux-cxl@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org
Cc: linux-mm@...ck.org
Cc: linux-xfs@...r.kernel.org
Cc: dm-devel@...ts.linux.dev
Cc: nvdimm@...ts.linux.dev
Cc: linux-s390@...r.kernel.org
---
 fs/fuse/virtio_fs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 621b1bca2d55..a28466c2da71 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -809,8 +809,8 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
 		return 0;
 
 	dax_dev = alloc_dax(fs, &virtio_fs_dax_ops);
-	if (IS_ERR_OR_NULL(dax_dev)) {
-		int rc = IS_ERR(dax_dev) ? PTR_ERR(dax_dev) : -EOPNOTSUPP;
+	if (IS_ERR(dax_dev)) {
+		int rc = PTR_ERR(dax_dev);
 		return rc == -EOPNOTSUPP ? 0 : rc;
 	}
 
-- 
2.39.2