linux-kernel - [PATCH 3.4 29/31] sc1200

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Message-Id: <20131218210523.611486738@linuxfoundation.org>
Date:	Wed, 18 Dec 2013 13:08:37 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alan Cox <alan@...ux.intel.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Wim Van Sebroeck <wim@...ana.be>
Subject: [PATCH 3.4 29/31] sc1200_wdt: Fix oops

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

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

From: Alan <gnomes@...rguk.ukuu.org.uk>

commit dace8bbfccfd9e4fcccfffcfbd82881fda3e756f upstream.

If loaded with isapnp = 0 the driver explodes. This is catching
people out now and then. What should happen in the working case is
a complete mystery and the code appears terminally confused, but we
can at least make the error path work properly.

Signed-off-by: Alan Cox <alan@...ux.intel.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
Partially-Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=53991
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/watchdog/sc1200wdt.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/watchdog/sc1200wdt.c
+++ b/drivers/watchdog/sc1200wdt.c
@@ -409,8 +409,9 @@ static int __init sc1200wdt_init(void)
 #if defined CONFIG_PNP
 	/* now that the user has specified an IO port and we haven't detected
 	 * any devices, disable pnp support */
+	if (isapnp)
+		pnp_unregister_driver(&scl200wdt_pnp_driver);
 	isapnp = 0;
-	pnp_unregister_driver(&scl200wdt_pnp_driver);
 #endif
 
 	if (!request_region(io, io_len, SC1200_MODULE_NAME)) {


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