Date: Fri, 7 Nov 2008 15:16:06 -0800
From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
       Zwane Mwaikambo <zwane@arm.linux.org.uk>,
       "Theodore Ts'o" <tytso@mit.edu>, Randy Dunlap <rdunlap@xenotime.net>,
       Dave Jones <davej@redhat.com>, Chuck Wolber <chuckw@quantumlinux.com>,
       Chris Wedgwood <reviews@ml.cw.f00f.org>,
       Michael Krufky <mkrufky@linuxtv.org>, Chuck Ebbert <cebbert@redhat.com>,
       Domenico Andreoli <cavokz@gmail.com>, Willy Tarreau <w@1wt.eu>,
       Rodrigo Rubira Branco <rbranco@la.checkpoint.com>,
       Jake Edge <jake@lwn.net>, Eugene Teo <eteo@redhat.com>,
       torvalds@linux-foundation.org, akpm@linux-foundation.org,
       alan@lxorguk.ukuu.org.uk, linux-acpi@vger.kernel.org,
       Shaohua Li <shaohua.li@intel.com>, Len Brown <len.brown@intel.com>
Subject: [patch 20/23] ACPI: dock: avoid check _STA method
Message-ID: <20081107231606.GU1108@kroah.com>
References: <20081107224818.593212310@mini.kroah.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline; filename="acpi-dock-avoid-check-_sta-method.patch"
In-Reply-To: <20081107231457.GA1108@kroah.com>
User-Agent: Mutt/1.5.16 (2007-06-09)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1637
Lines: 53

2.6.26-stable review patch.  If anyone has any objections, please let us know.

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

From: Shaohua Li <shaohua.li@intel.com>

commit 8b59560a3baf2e7c24e0fb92ea5d09eca92805db upstream.

ACPI: dock: avoid check _STA method

In some BIOSes, every _STA method call will send a notification again,
this cause freeze. And in some BIOSes, it appears _STA should be called
after _DCK. This tries to avoid calls _STA, and still keep the device
present check.

http://bugzilla.kernel.org/show_bug.cgi?id=10431

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/acpi/dock.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -599,14 +599,17 @@ static int handle_eject_request(struct d
 static void dock_notify(acpi_handle handle, u32 event, void *data)
 {
 	struct dock_station *ds = data;
+	struct acpi_device *tmp;
 
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
-		if (!dock_in_progress(ds) && dock_present(ds)) {
+		if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle,
+		   &tmp)) {
 			begin_dock(ds);
 			dock(ds);
 			if (!dock_present(ds)) {
 				printk(KERN_ERR PREFIX "Unable to dock!\n");
+				complete_dock(ds);
 				break;
 			}
 			atomic_notifier_call_chain(&dock_notifier_list,

-- 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/