linux-kernel - [PATCH 1/8] ceph: fix error handling in ceph_get

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Date:   Thu, 23 May 2019 16:06:39 +0800
From:   "Yan, Zheng" <zyan@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     idryomov@...hat.com, jlayton@...hat.com
Subject: [PATCH 1/8] ceph: fix error handling in ceph_get_caps()

The function return 0 even when interrupted or try_get_cap_refs()
return error.

Introduce by commit 1199d7da2d "ceph: simplify arguments and return
semantics of try_get_cap_refs"

Signed-off-by: "Yan, Zheng" <zyan@...hat.com>
---
 fs/ceph/caps.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 72f8e1311392..079d0df9650c 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2738,15 +2738,13 @@ int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
 		_got = 0;
 		ret = try_get_cap_refs(ci, need, want, endoff,
 				       false, &_got);
-		if (ret == -EAGAIN) {
+		if (ret == -EAGAIN)
 			continue;
-		} else if (!ret) {
-			int err;
-
+		if (!ret) {
 			DEFINE_WAIT_FUNC(wait, woken_wake_function);
 			add_wait_queue(&ci->i_cap_wq, &wait);
 
-			while (!(err = try_get_cap_refs(ci, need, want, endoff,
+			while (!(ret = try_get_cap_refs(ci, need, want, endoff,
 							true, &_got))) {
 				if (signal_pending(current)) {
 					ret = -ERESTARTSYS;
@@ -2756,14 +2754,16 @@ int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
 			}
 
 			remove_wait_queue(&ci->i_cap_wq, &wait);
-			if (err == -EAGAIN)
+			if (ret == -EAGAIN)
 				continue;
 		}
-		if (ret == -ESTALE) {
-			/* session was killed, try renew caps */
-			ret = ceph_renew_caps(&ci->vfs_inode);
-			if (ret == 0)
-				continue;
+		if (ret < 0) {
+			if (ret == -ESTALE) {
+				/* session was killed, try renew caps */
+				ret = ceph_renew_caps(&ci->vfs_inode);
+				if (ret == 0)
+					continue;
+			}
 			return ret;
 		}
 
-- 
2.17.2