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PCI/DPC: Quirk PIO log size for Intel Raptor Lake-P
authorTakashi Iwai <tiwai@suse.de>
Thu, 2 Jan 2025 16:43:13 +0000 (17:43 +0100)
committerKrzysztof Wilczyński <kwilczynski@kernel.org>
Wed, 15 Jan 2025 17:59:55 +0000 (17:59 +0000)
commitb198499c7d2508a76243b98e7cca992f6fd2b7f7
treec2329fa3219a784d59d72c0ee6d5c39c2576ac9a
parent40384c840ea1944d7c5a392e8975ed088ecf0b37
PCI/DPC: Quirk PIO log size for Intel Raptor Lake-P

Apparently the Raptor Lake-P reference firmware configures the PIO log size
correctly, but some vendor BIOSes, including at least ASUSTeK COMPUTER INC.
Zenbook UX3402VA_UX3402VA, do not.

Apply the quirk for Raptor Lake-P.  This prevents kernel complaints like:

  DPC: RP PIO log size 0 is invalid

and also enables the DPC driver to dump the RP PIO Log registers when DPC
is triggered.

Note that the bug report also mentions 8086:a76e, which has been already
added by 627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake
Root Ports").

Link: https://lore.kernel.org/r/20250102164315.7562-1-tiwai@suse.de
Link: https://bugzilla.suse.com/show_bug.cgi?id=1234623
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
drivers/pci/quirks.c