linux-kernel - [140/200] pcmcia: only keep saved I365

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Message-Id: <20100701174258.233494395@clark.site>
Date:	Thu, 01 Jul 2010 10:43:50 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Dominik Brodowski <linux@...inikbrodowski.net>
Subject: [140/200] pcmcia: only keep saved I365_CSCINT flag if there is no PCI irq

2.6.34-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski <linux@...inikbrodowski.net>

commit 02caa56e4b789b80ae7e0f0f0789f94b44ad32ef upstream.

Keeping the saved I365_CSCINT flag around breaks PCMCIA on some system,
and is only needed on a few systems to get PCMCIA to work. This patch
allows PCMCIA to work on both types, and it fixes
https://bugzilla.kernel.org/show_bug.cgi?id=16015

Reported-by: Justin P. Mattock <justinmattock@...il.com>
Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/pcmcia/yenta_socket.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -975,7 +975,7 @@ static irqreturn_t yenta_probe_handler(i
 /* probes the PCI interrupt, use only on override functions */
 static int yenta_probe_cb_irq(struct yenta_socket *socket)
 {
-	u8 reg;
+	u8 reg = 0;
 
 	if (!socket->cb_irq)
 		return -1;
@@ -989,7 +989,8 @@ static int yenta_probe_cb_irq(struct yen
 	}
 
 	/* generate interrupt, wait */
-	reg = exca_readb(socket, I365_CSCINT);
+	if (!socket->dev->irq)
+		reg = exca_readb(socket, I365_CSCINT);
 	exca_writeb(socket, I365_CSCINT, reg | I365_CSC_STSCHG);
 	cb_writel(socket, CB_SOCKET_EVENT, -1);
 	cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);


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