linux-kernel - [PATCH 11/20] staging/lustre/lnet: portal spreading rotor should be unsigned

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Date:	Sun,  1 Feb 2015 21:52:10 -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>,
	Liang Zhen <liang.zhen@...el.com>,
	Oleg Drokin <oleg.drokin@...el.com>
Subject: [PATCH 11/20] staging/lustre/lnet: portal spreading rotor should be unsigned

From: Liang Zhen <liang.zhen@...el.com>

Portal spreading rotor should be unsigned, otherwise lnet may get
negative CPT number and access invalid addresses.

Signed-off-by: Liang Zhen <liang.zhen@...el.com>
Reviewed-on: http://review.whamcloud.com/11936
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5639
Reviewed-by: Amir Shehata <amir.shehata@...el.com>
Reviewed-by: Isaac Huang <he.huang@...el.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@...el.com>
Signed-off-by: Oleg Drokin <oleg.drokin@...el.com>
---
 drivers/staging/lustre/include/linux/lnet/lib-types.h | 2 +-
 drivers/staging/lustre/lnet/lnet/lib-ptl.c            | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/include/linux/lnet/lib-types.h b/drivers/staging/lustre/include/linux/lnet/lib-types.h
index ba1876f..50537668 100644
--- a/drivers/staging/lustre/include/linux/lnet/lib-types.h
+++ b/drivers/staging/lustre/include/linux/lnet/lib-types.h
@@ -622,7 +622,7 @@ typedef struct lnet_portal {
 	/* Match table for each CPT */
 	struct lnet_match_table	**ptl_mtables;
 	/* spread rotor of incoming "PUT" */
-	int			ptl_rotor;
+	unsigned int		ptl_rotor;
 	/* # active entries for this portal */
 	int		     ptl_mt_nmaps;
 	/* array of active entries' cpu-partition-id */
diff --git a/drivers/staging/lustre/lnet/lnet/lib-ptl.c b/drivers/staging/lustre/lnet/lnet/lib-ptl.c
index 19ed696..3ba0da9 100644
--- a/drivers/staging/lustre/lnet/lnet/lib-ptl.c
+++ b/drivers/staging/lustre/lnet/lnet/lib-ptl.c
@@ -262,10 +262,10 @@ lnet_mt_of_match(struct lnet_match_info *info, struct lnet_msg *msg)
 {
 	struct lnet_match_table	*mtable;
 	struct lnet_portal	*ptl;
-	int			nmaps;
-	int			rotor;
-	int			routed;
-	int			cpt;
+	unsigned int		nmaps;
+	unsigned int		rotor;
+	unsigned int		cpt;
+	bool			routed;
 
 	/* NB: called w/o lock */
 	LASSERT(info->mi_portal < the_lnet.ln_nportals);
-- 
2.1.0

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