linux-kernel - [PATCH 13/20] staging/lustre/ptlrpc: hold rq_lock when modify rq

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Date:	Sun,  1 Feb 2015 21:52:12 -0500
From:	green@...uxhacker.ru
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Niu Yawei <yawei.niu@...el.com>,
	Oleg Drokin <oleg.drokin@...el.com>
Subject: [PATCH 13/20] staging/lustre/ptlrpc: hold rq_lock when modify rq_flags

From: Niu Yawei <yawei.niu@...el.com>

In after_reply(), take the rq_lock for changing the rq_resend.

Signed-off-by: Niu Yawei <yawei.niu@...el.com>
Reviewed-on: http://review.whamcloud.com/11957
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5633
Reviewed-by: Fan Yong <fan.yong@...el.com>
Reviewed-by: Johann Lombardi <johann.lombardi@...el.com>
Signed-off-by: Oleg Drokin <oleg.drokin@...el.com>
---
 drivers/staging/lustre/lustre/ptlrpc/client.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c
index 8c1ec83..4882dd0 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/client.c
@@ -1247,7 +1247,9 @@ static int after_reply(struct ptlrpc_request *req)
 		time_t	now = get_seconds();
 
 		DEBUG_REQ(D_RPCTRACE, req, "Resending request on EINPROGRESS");
+		spin_lock(&req->rq_lock);
 		req->rq_resend = 1;
+		spin_unlock(&req->rq_lock);
 		req->rq_nr_resend++;
 
 		/* allocate new xid to avoid reply reconstruction */
-- 
2.1.0

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