The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
Thanks,
Sasha
------------------ original commit in Linus's tree ------------------
>From 627c6db20703b5d18d928464f411d0d4ec327508 Mon Sep 17 00:00:00 2001
From: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
Date: Tue, 5 Mar 2024 12:30:56 +0100
Subject: [PATCH] PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports
Commit 5459c0b70467 ("PCI/DPC: Quirk PIO log size for certain Intel Root
Ports") and commit 3b8803494a06 ("PCI/DPC: Quirk PIO log size for Intel Ice
Lake Root Ports") add quirks for Ice, Tiger and Alder Lake Root Ports.
System firmware for Raptor Lake still has the bug, so Linux logs the
warning below on several Raptor Lake systems like Dell Precision 3581 with
Intel Raptor Lake processor (0W18NX) system firmware/BIOS version 1.10.1.
pci 0000:00:07.0: [8086:a76e] type 01 class 0x060400
pci 0000:00:07.0: DPC: RP PIO log size 0 is invalid
pci 0000:00:07.1: [8086:a73f] type 01 class 0x060400
pci 0000:00:07.1: DPC: RP PIO log size 0 is invalid
Apply the quirk for Raptor Lake Root Ports as well.
This also enables the DPC driver to dump the RP PIO Log registers when DPC
is triggered.
Link: https://lore.kernel.org/r/20240305113057.56468-1-pmenzel@xxxxxxxxxxxxx
Reported-by: Niels van Aert <nvaert1986@xxxxxxxxxxx>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218560
Signed-off-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Cc: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Cc: Niels van Aert <nvaert1986@xxxxxxxxxxx>
---
drivers/pci/quirks.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d797df6e5f3e9..663d838fa861d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -6225,6 +6225,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2b, dpc_log_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa73f, dpc_log_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa76e, dpc_log_size);
#endif
/*
--
2.43.0
