linux-kernel - [PATCH] rio: typo in bitwise AND expression.

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Message-ID: <20061122225856.GB10758@1wt.eu>
Date:	Wed, 22 Nov 2006 23:58:56 +0100
From:	Willy Tarreau <w@....eu>
To:	R.E.Wolff@...Wizard.nl
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] rio: typo in bitwise AND expression.

Hi Rogier,

here's a patch to fix a typo in rio_linux which affects both
kernel 2.4 and 2.6. It's not big deal it seems as it only
affects the irq-less path.

I found this one like that :

 $ grep -r '[^&]&[^&]*![^=]' drivers/char/

I'm sure others will find more efficient rules to catch such
errors.

Regards,
Willy

>From 4fb85842b76ad28893ea2aeaeb6dbc4e3f5a2dee Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@....eu>
Date: Wed, 22 Nov 2006 23:54:48 +0100
Subject: [PATCH] rio: typo in bitwise AND expression.

The line :

    hp->Mode &= !RIO_PCI_INT_ENABLE;

is obviously wrong as RIO_PCI_INT_ENABLE=0x04 and is used as a bitmask
2 lines before. Getting no IRQ would not disable RIO_PCI_INT_ENABLE
but rather RIO_PCI_BOOT_FROM_RAM which equals 0x01.

Obvious fix is to change ! for ~.

Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/char/rio/rio_linux.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index 7ac68cb..3228fad 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -1143,7 +1143,7 @@ #endif				/* PCI */
 				rio_dprintk(RIO_DEBUG_INIT, "Enabling interrupts on rio card.\n");
 				hp->Mode |= RIO_PCI_INT_ENABLE;
 			} else
-				hp->Mode &= !RIO_PCI_INT_ENABLE;
+				hp->Mode &= ~RIO_PCI_INT_ENABLE;
 			rio_dprintk(RIO_DEBUG_INIT, "New Mode: %x\n", hp->Mode);
 			rio_start_card_running(hp);
 		}
-- 
1.4.2.4

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