linux-kernel - [patch] [SCSI] mvsas: fix a && vs & bug

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Message-ID: <20120816110401.GA12318@elgon.mountain>
Date:	Thu, 16 Aug 2012 14:04:02 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	"James E.J. Bottomley" <JBottomley@...allels.com>
Cc:	Xiangliang Yu <yuxiangl@...vell.com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] [SCSI] mvsas: fix a && vs & bug

The "1 << (slot_idx % 32)" condition is always true.  The intent was to
test a bit field here using bitwise AND.  We do the test correctly a few
lines later in the do while loop.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
Static checker fix.  Untested.  Would apply to the -stable kernel.

diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index 7e423e5..16349aa 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -622,7 +622,7 @@ static void mvs_94xx_command_active(struct mvs_info *mvi, u32 slot_idx)
 {
 	u32 tmp;
 	tmp = mvs_cr32(mvi, MVS_COMMAND_ACTIVE+(slot_idx >> 3));
-	if (tmp && 1 << (slot_idx % 32)) {
+	if (tmp & 1 << (slot_idx % 32)) {
 		mv_printk("command active %08X,  slot [%x].\n", tmp, slot_idx);
 		mvs_cw32(mvi, MVS_COMMAND_ACTIVE + (slot_idx >> 3),
 			1 << (slot_idx % 32));
--
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