5.15-stable review patch. If anyone has any objections, please let me know.
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From: Paul Menzel pmenzel@molgen.mpg.de
[ Upstream commit 627c6db20703b5d18d928464f411d0d4ec327508 ]
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@molgen.mpg.de Reported-by: Niels van Aert nvaert1986@hotmail.com Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218560 Signed-off-by: Paul Menzel pmenzel@molgen.mpg.de Signed-off-by: Bjorn Helgaas bhelgaas@google.com Cc: stable@vger.kernel.org Cc: Mika Westerberg mika.westerberg@linux.intel.com Cc: Niels van Aert nvaert1986@hotmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/quirks.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 59b3dd33092bf..43e120b828169 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5985,4 +5985,6 @@ 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