From: Dan Carpenter <dan.carpenter@oracle.com>
To: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Xiangliang Yu <yuxiangl@marvell.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch] [SCSI] mvsas: fix a && vs & bug
Date: Thu, 16 Aug 2012 11:04:02 +0000 [thread overview]
Message-ID: <20120816110401.GA12318@elgon.mountain> (raw)
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@oracle.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));
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Xiangliang Yu <yuxiangl@marvell.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch] [SCSI] mvsas: fix a && vs & bug
Date: Thu, 16 Aug 2012 14:04:02 +0300 [thread overview]
Message-ID: <20120816110401.GA12318@elgon.mountain> (raw)
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@oracle.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));
next reply other threads:[~2012-08-16 11:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-16 11:04 Dan Carpenter [this message]
2012-08-16 11:04 ` [patch] [SCSI] mvsas: fix a && vs & bug Dan Carpenter
2012-08-16 15:23 ` Jeff Garzik
2012-08-16 15:23 ` Jeff Garzik
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