linux-kernel - [PATCH] parport: Use request_muxed

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Message-ID: <20110504091828.7617.27830.stgit@bob.linux.org.uk>
Date:	Wed, 04 May 2011 10:18:42 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [PATCH] parport: Use request_muxed_region for IT87 probe and lock

From: Alan Cox <alan@...ux.intel.com>

This is needed as part of making the various IT87 drivers actually co-exist
politely with each other, and with other superio devices that may be muxed
on 0x2E/0x2F.

It can be applied before or after the other patches by Nat Gurumoorthy without
problem.

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 drivers/parport/parport_pc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)


diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index bc8ce48..f330338 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -1621,7 +1621,7 @@ static void __devinit detect_and_report_it87(void)
 	u8 origval, r;
 	if (verbose_probing)
 		printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
-	if (!request_region(0x2e, 2, __func__))
+	if (!request_muxed_region(0x2e, 2, __func__))
 		return;
 	origval = inb(0x2e);		/* Save original value */
 	outb(0x87, 0x2e);

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