From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Fri, 25 Nov 2016 18:24:09 +0000 (-0500)
Subject: pNFS/flexfiles: Don't attempt to send layoutstats if there are no entries
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=46c98c6d1bd33f8ae2c3b8f379f1629c472141e3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

pNFS/flexfiles: Don't attempt to send layoutstats if there are no entries

If the list of mirrors is empty, then don't send an RPC call.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 90462a2a9237..a6264d6836dc 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -2250,6 +2250,11 @@ ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
 	args->num_dev = ff_layout_mirror_prepare_stats(args,
 			&ff_layout->generic_hdr, dev_count);
 	spin_unlock(&args->inode->i_lock);
+	if (!args->num_dev) {
+		kfree(args->devinfo);
+		args->devinfo = NULL;
+		return -ENOENT;
+	}
 
 	return 0;
 }