This is a note to let you know that I've just added the patch titled
x86: Fix boot on Twinhead H12Y
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-fix-boot-on-twinhead-h12y.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 80b3e557371205566a71e569fbfcce5b11f92dbe Mon Sep 17 00:00:00 2001
From: Alan Cox <[email protected]>
Date: Tue, 15 May 2012 18:44:15 +0100
Subject: x86: Fix boot on Twinhead H12Y
From: Alan Cox <[email protected]>
commit 80b3e557371205566a71e569fbfcce5b11f92dbe upstream.
Despite lots of investigation into why this is needed we don't
know or have an elegant cure. The only answer found on this
laptop is to mark a problem region as used so that Linux doesn't
put anything there.
Currently all the users add reserve= command lines and anyone
not knowing this needs to find the magic page that documents it.
Automate it instead.
Signed-off-by: Alan Cox <[email protected]>
Tested-and-bugfixed-by: Arne Fitzenreiter <[email protected]>
Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=10231
Link: http://lkml.kernel.org/r/20120515174347.5109.94551.stgit@bluebook
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/pci/fixup.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -521,3 +521,20 @@ static void sb600_disable_hpet_bar(struc
}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
+
+/*
+ * Twinhead H12Y needs us to block out a region otherwise we map devices
+ * there and any access kills the box.
+ *
+ * See: https://bugzilla.kernel.org/show_bug.cgi?id=10231
+ *
+ * Match off the LPC and svid/sdid (older kernels lose the bridge subvendor)
+ */
+static void __devinit twinhead_reserve_killing_zone(struct pci_dev *dev)
+{
+ if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device ==
0xA003) {
+ pr_info("Reserving memory on Twinhead H12Y\n");
+ request_mem_region(0xFFB00000, 0x100000, "twinhead");
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9,
twinhead_reserve_killing_zone);
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/ahci-add-alternate-identifier-for-the-88se9172.patch
queue-3.0/usb-ftdi_sio-do-not-claim-cdc-acm-function.patch
queue-3.0/x86-fix-boot-on-twinhead-h12y.patch
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