linux-kernel - RE: [Fwd: [patch] [SCSI] arcmsr: fix misuse of

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Date:	Wed, 20 Jun 2012 09:38:10 +0800
From:	"NickCheng" <nick.cheng@...ca.com.tw>
To:	"'James Bottomley'" <James.Bottomley@...senPartnership.com>
Cc:	<linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: RE: [Fwd: [patch] [SCSI] arcmsr: fix misuse of | instead of &]

Hi James,
Sorry for be late response.
I am OK with it.
-----Original Message-----
From: James Bottomley [mailto:James.Bottomley@...senPartnership.com] 
Sent: Tuesday, June 19, 2012 11:57 PM
To: Nick Cheng
Subject: [Fwd: [patch] [SCSI] arcmsr: fix misuse of | instead of &]

Is this OK with you?

James

-------- Forwarded Message --------
From: Dan Carpenter <dan.carpenter@...cle.com>
To: James E.J. Bottomley <JBottomley@...allels.com>
Cc: David Howells <dhowells@...hat.com>, Nick Cheng
<nick.cheng@...ca.com.tw>, , kernel-janitors@...r.kernel.org
Subject: [patch] [SCSI] arcmsr: fix misuse of | instead of &
Date: Sat, 9 Jun 2012 12:10:19 +0300

ARCMSR_ARC1880_DiagWrite_ENABLE is 0x00000080 so (x | 0x00000080) is
never zero.  The intent here was to test that loop until
ARCMSR_ARC1880_DiagWrite_ENABLE was turned on, but because the test was
wrong, we would do five loops regardless of whether it succeed or not.

Also I simplified the condition a little by removing the unused
assignement.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
Static checker stuff.  I do not own this hardware.

diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c
b/drivers/scsi/arcmsr/arcmsr_hba.c
index cbde1dc..def24a1 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -2821,7 +2821,7 @@ static void arcmsr_hardware_reset(struct
AdapterControlBlock *acb)
 	int i, count = 0;
 	struct MessageUnit_A __iomem *pmuA = acb->pmuA;
 	struct MessageUnit_C __iomem *pmuC = acb->pmuC;
-	u32 temp = 0;
+
 	/* backup pci config data */
 	printk(KERN_NOTICE "arcmsr%d: executing hw bus reset .....\n",
acb->host->host_no);
 	for (i = 0; i < 64; i++) {
@@ -2839,7 +2839,7 @@ static void arcmsr_hardware_reset(struct
AdapterControlBlock *acb)
 			writel(0x2, &pmuC->write_sequence);
 			writel(0x7, &pmuC->write_sequence);
 			writel(0xD, &pmuC->write_sequence);
-		} while ((((temp = readl(&pmuC->host_diagnostic)) |
ARCMSR_ARC1880_DiagWrite_ENABLE) == 0) && (count < 5));
+		} while (((readl(&pmuC->host_diagnostic) &
ARCMSR_ARC1880_DiagWrite_ENABLE) == 0) && (count < 5));
 		writel(ARCMSR_ARC1880_RESET_ADAPTER,
&pmuC->host_diagnostic);
 	} else {
 		pci_write_config_byte(acb->pdev, 0x84, 0x20);
--
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