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Commit 50bfd2b8 authored by Takashi Iwai's avatar Takashi Iwai Committed by Frieder Schrempf
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PCI/DPC: Quirk PIO log size for Intel Raptor Lake-P

[ Upstream commit b198499c7d2508a76243b98e7cca992f6fd2b7f7 ]

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 627c6db2 ("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: default avatarTakashi Iwai <tiwai@suse.de>
[bhelgaas: commit log]
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: default avatarKrzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 6981a8f9
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1 merge request!191🤖 Sync Bot: Update v6.1-ktn to Latest Stable Kernel (v6.1.129)
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