From 118365721768f29d74718a59895ed7bd3c10b68e Mon Sep 17 00:00:00 2001
From: vignesh babu <vignesh.babu@wipro.com>
Date: Thu, 13 Dec 2007 12:43:41 -0600
Subject: [SCSI] libiscsi: use is_power_of_2

Replacing n & (n - 1) for power of 2 check by is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
 drivers/scsi/libiscsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers/scsi/libiscsi.c')

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 6573223cb346..553168ae44f1 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -24,6 +24,7 @@
 #include <linux/types.h>
 #include <linux/kfifo.h>
 #include <linux/delay.h>
+#include <linux/log2.h>
 #include <asm/unaligned.h>
 #include <net/tcp.h>
 #include <scsi/scsi_cmnd.h>
@@ -1700,7 +1701,7 @@ iscsi_session_setup(struct iscsi_transport *iscsit,
 		qdepth = ISCSI_DEF_CMD_PER_LUN;
 	}
 
-	if (cmds_max < 2 || (cmds_max & (cmds_max - 1)) ||
+	if (!is_power_of_2(cmds_max) ||
 	    cmds_max >= ISCSI_MGMT_ITT_OFFSET) {
 		if (cmds_max != 0)
 			printk(KERN_ERR "iscsi: invalid can_queue of %d. "
-- 
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