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ASoC: amd: yc: disable MSI on resume

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BIOS/firmware may re-enable MSI in PCI config space during system
resume even though this driver only uses legacy INTx interrupts. If MSI
is left enabled with stale address and data registers, the device can
write interrupts to a bogus address and cause an IOMMU IO_PAGE_FAULT.

Clear the MSI Enable bit before reinitializing ACP hardware on system
resume. Keep runtime resume separate because firmware does not restore
PCI configuration on that path.

Fixes: c8212df7bc ("ASoC: amd: add acp6x pci driver pm ops")
Reported-by: Marek Borůvka <boruvka.marek@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=222119
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/20261013125425.3541206-1-mario.limonciello@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Mario Limonciello 2026-10-13 07:54:23 -05:00 • committed by Mark Brown
commit 2a31b5378c
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