From: Li Wang <liwang@ubuntukylin.com>
Date: Sat, 9 Nov 2013 02:26:06 +0000 (+0800)
Subject: ceph: allocate non-zero page to fscache in readpage()
X-Git-Tag: firefly_0821_release~176^2~4875^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ff638b7df5a9264024a6448bdfde2b2bf5d1994a;p=firefly-linux-kernel-4.4.55.git

ceph: allocate non-zero page to fscache in readpage()

ceph_osdc_readpages() returns number of bytes read, currently,
the code only allocate full-zero page into fscache, this patch
fixes this.

Signed-off-by: Li Wang <liwang@ubuntukylin.com>
Reviewed-by: Milosz Tanski <milosz@adfin.com>
Reviewed-by: Sage Weil <sage@inktank.com>
---

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 6df8bd481425..1e561c059539 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -216,7 +216,7 @@ static int readpage_nounlock(struct file *filp, struct page *page)
 	}
 	SetPageUptodate(page);
 
-	if (err == 0)
+	if (err >= 0)
 		ceph_readpage_to_fscache(inode, page);
 
 out: