linux-kernel - Re: Acpi deadlocks with 3.7.0-rc4

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Date:	Wed, 28 Nov 2012 21:31:38 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Zdenek Kabelac <zkabelac@...hat.com>
Cc:	linux-acpi@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Acpi deadlocks with 3.7.0-rc4

On Wednesday, November 28, 2012 06:27:50 PM Zdenek Kabelac wrote:
> Dne 28.11.2012 18:02, Linus Torvalds napsal(a):
> > On Wed, Nov 28, 2012 at 8:21 AM, Zdenek Kabelac <zkabelac@...hat.com> wrote:
> >>
> >> I've opened  https://bugzilla.kernel.org/show_bug.cgi?id=51071
> >> and attached picture there which is all I have.

I wonder if you can try to apply the patch below and see if that makes any
difference?

Rafael


---
 drivers/pnp/pnpacpi/rsparser.c |    8 ++++++++
 1 file changed, 8 insertions(+)

Index: linux/drivers/pnp/pnpacpi/rsparser.c
===================================================================
--- linux.orig/drivers/pnp/pnpacpi/rsparser.c
+++ linux/drivers/pnp/pnpacpi/rsparser.c
@@ -610,6 +610,14 @@ int pnpacpi_build_resource_template(stru
 	struct acpi_resource *resource;
 	int res_cnt = 0;
 	acpi_status status;
+	int ret;
+
+	/* Sanity check. */
+	ret = acpi_bus_get_device(handle, &acpi_dev);
+	if (ret) {
+		dev_err(&dev->dev, "ACPI node is invalid in %s\n", __func__);
+		return ret;
+	}
 
 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 				     pnpacpi_count_resources, &res_cnt);



-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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