This is a note to let you know that I've just added the patch titled
PCI: Limit config space size for Netronome NFP6000 family
to the 4.4-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:
pci-limit-config-space-size-for-netronome-nfp6000-family.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9f33a2ae59f24452c1076749deb615bccd435ca9 Mon Sep 17 00:00:00 2001
From: "Jason S. McMullan" <jason.mcmullan@xxxxxxxxxxxxx>
Date: Wed, 30 Sep 2015 15:35:07 +0900
Subject: PCI: Limit config space size for Netronome NFP6000 family
From: Jason S. McMullan <jason.mcmullan@xxxxxxxxxxxxx>
commit 9f33a2ae59f24452c1076749deb615bccd435ca9 upstream.
The NFP6000 has an erratum where reading/writing to PCI config space
addresses above 0x600 can cause the NFP to generate PCIe completion
timeouts.
Limit the NFP6000's config space size to 0x600 bytes.
Signed-off-by: Jason S. McMullan <jason.mcmullan@xxxxxxxxxxxxx>
[simon: edited changelog]
Signed-off-by: Simon Horman <simon.horman@xxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/quirks.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -287,6 +287,17 @@ static void quirk_citrine(struct pci_dev
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, quirk_citrine);
+/*
+ * This chip can cause bus lockups if config addresses above 0x600
+ * are read or written.
+ */
+static void quirk_nfp6000(struct pci_dev *dev)
+{
+ dev->cfg_size = 0x600;
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000, quirk_nfp6000);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000_VF, quirk_nfp6000);
+
/* On IBM Crocodile ipr SAS adapters, expand BAR to system page size */
static void quirk_extend_bar_to_page(struct pci_dev *dev)
{
Patches currently in stable-queue which might be from jason.mcmullan@xxxxxxxxxxxxx are
queue-4.4/pci-limit-config-space-size-for-netronome-nfp6000-family.patch
queue-4.4/pci-support-pcie-devices-with-short-cfg_size.patch
queue-4.4/pci-add-netronome-vendor-and-device-ids.patch
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