The patch titled
pci: update MCP55 quirk to not affect non HyperTransport variants
has been added to the -mm tree. Its filename is
pci-update-mcp55-quirk-to-not-affect-non-hypertransport-variants.patch
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------------------------------------------------------
Subject: pci: update MCP55 quirk to not affect non HyperTransport variants
From: Neil Horman <nhorman@xxxxxxxxxxxxx>
I wrote this quirk awhile ago to properly setup MCP55 chips on
hypertransport busses so that interrupts reached whatever cpu happend to
boot the kdump kernel. while that works well, it was recently shown to me
that a a non-hypertransport variant of the MCP55 exists, and on those
system the register that this quirk manipulates causes hangs if you write
to it. Since the quirk was only meant to handle errors found on MCP55
chips that have a HT interface, this patch adds a filter to make sure the
chip is an HT capable before making the needed register adjustment. This
lets the broken MCP55s work with kdump while not breaking the non-HT
variants.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=23952
Tested successfully by the reporter and myself.
Reported-by: Mathieu Bérard <mathieu@xxxxxxxxxx>
Tested-by: Mathieu Bérard <mathieu@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pci/quirks.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN drivers/pci/quirks.c~pci-update-mcp55-quirk-to-not-affect-non-hypertransport-variants drivers/pci/quirks.c
--- a/drivers/pci/quirks.c~pci-update-mcp55-quirk-to-not-affect-non-hypertransport-variants
+++ a/drivers/pci/quirks.c
@@ -2329,6 +2329,9 @@ static void __devinit nvbridge_check_leg
{
u32 cfg;
+ if (!pci_find_capability(dev, PCI_CAP_ID_HT))
+ return;
+
pci_read_config_dword(dev, 0x74, &cfg);
if (cfg & ((1 << 2) | (1 << 15))) {
_
Patches currently in -mm which might be from nhorman@xxxxxxxxxxxxx are
linux-next.patch
pci-update-mcp55-quirk-to-not-affect-non-hypertransport-variants.patch
fs-execc-provide-the-correct-process-pid-to-the-pipe-helper.patch
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