linux-kernel - [077/197] eeepc-laptop: dmi blacklist to disable pci hotplug code

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Date:	Thu, 22 Apr 2010 12:08:48 -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,
	Corentin Chary <corentincj@...aif.net>,
	Len Brown <len.brown@...el.com>,
	Ben Hutchings <ben@...adent.org.uk>
Subject: [077/197] eeepc-laptop: dmi blacklist to disable pci hotplug code

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

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

commit 10ae4b5663ff3092553bfbd867e7bd474ce6c553 upstream.

This is a short term workaround for Eeepc 1005HA.

refs: <http://bugzilla.kernel.org/show_bug.cgi?id=14570>

[bwh: Backported to 2.6.32]

Signed-off-by: Corentin Chary <corentincj@...aif.net>
Signed-off-by: Len Brown <len.brown@...el.com>
Cc: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/platform/x86/eeepc-laptop.c |   25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -137,6 +137,7 @@ struct eeepc_hotk {
 	u32 cm_supported;		/* the control methods supported
 					   by this BIOS */
 	bool cpufv_disabled;
+	bool hotplug_disabled;
 	uint init_flag;			/* Init flags */
 	u16 event_count[128];		/* count for each event */
 	struct input_dev *inputdev;
@@ -614,6 +615,10 @@ static void eeepc_dmi_check(void)
 {
 	const char *model;
 
+	model = dmi_get_system_info(DMI_PRODUCT_NAME);
+	if (!model)
+		return;
+
 	/*
 	 * Blacklist for setting cpufv (cpu speed).
 	 *
@@ -633,17 +638,24 @@ static void eeepc_dmi_check(void)
 	 * substring matching.  We don't want to affect the "701SD"
 	 * and "701SDX" models, because they do support S.H.E.
 	 */
-
-	model = dmi_get_system_info(DMI_PRODUCT_NAME);
-	if (!model)
-		return;
-
 	if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
 		ehotk->cpufv_disabled = true;
 		pr_info("model %s does not officially support setting cpu "
 			"speed\n", model);
 		pr_info("cpufv disabled to avoid instability\n");
 	}
+
+	/*
+	 * Blacklist for wlan hotplug
+	 *
+	 * Eeepc 1005HA doesn't work like others models and don't need the
+	 * hotplug code. In fact, current hotplug code seems to unplug another
+	 * device...
+	 */
+	if (strcmp(model, "1005HA") == 0) {
+		ehotk->hotplug_disabled = true;
+		pr_info("wlan hotplug disabled\n");
+	}
 }
 
 static void cmsg_quirk(int cm, const char *name)
@@ -1177,6 +1189,9 @@ static int eeepc_rfkill_init(struct devi
 	if (result && result != -ENODEV)
 		goto exit;
 
+	if (ehotk->hotplug_disabled)
+		return 0;
+
 	result = eeepc_setup_pci_hotplug();
 	/*
 	 * If we get -EBUSY then something else is handling the PCI hotplug -


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