linux-kernel - [PATCH 4.19 025/276] NFSv4.2 fix unnecessary retry in nfs4_copy_file

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Date:   Wed, 29 May 2019 20:03:03 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Olga Kornievskaia <kolga@...app.com>,
        Anna Schumaker <Anna.Schumaker@...app.com>,
        Yu Xu <xuyu@...ux.alibaba.com>
Subject: [PATCH 4.19 025/276] NFSv4.2 fix unnecessary retry in nfs4_copy_file_range

From: Olga Kornievskaia <olga.kornievskaia@...il.com>

commit 45ac486ecf2dc998e25cf32f0cabf2deaad875be upstream.

Currently nfs42_proc_copy_file_range() can not return EAGAIN.

Fixes: e4648aa4f98a ("NFS recover from destination server reboot for copies")
Signed-off-by: Olga Kornievskaia <kolga@...app.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@...app.com>
Cc: Yu Xu <xuyu@...ux.alibaba.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/nfs/nfs4file.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -133,15 +133,9 @@ static ssize_t nfs4_copy_file_range(stru
 				    struct file *file_out, loff_t pos_out,
 				    size_t count, unsigned int flags)
 {
-	ssize_t ret;
-
 	if (file_inode(file_in) == file_inode(file_out))
 		return -EINVAL;
-retry:
-	ret = nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
-	if (ret == -EAGAIN)
-		goto retry;
-	return ret;
+	return nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
 }
 
 static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence)