linux-kernel - [PATCH RESEND] PCI: Add function 1 DMA alias quirk for Marvell 88SE9235

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Date:   Wed,  7 Jun 2023 18:18:47 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     bhelgaas@...gle.com
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux.dev, hch@...radead.org, stable@...r.kernel.org,
        Jason Adriaanse <jason_a69@...oo.co.uk>
Subject: [PATCH RESEND] PCI: Add function 1 DMA alias quirk for Marvell 88SE9235

Marvell's own product brief implies the 92xx series are a closely
related family, and sure enough it turns out that 9235 seems to need the
same quirk as the other three, although possibly only when certain ports
are used.

CC: stable@...r.kernel.org
Reported-by: Jason Adriaanse <jason_a69@...oo.co.uk>
Link: https://lore.kernel.org/linux-iommu/2a699a99-545c-1324-e052-7d2f41fed1ae@yahoo.co.uk/
Signed-off-by: Robin Murphy <robin.murphy@....com>
---

Note that the actual regression which started the thread is a different
matter, wherein a particular combination of parameters which used to put
intel-iommu into passthrough mode now enables full translation instead.

Take #2, hopefully not royally screwing up my email alises this time.
Sorry about that...

 drivers/pci/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index f4e2a88729fd..3186f2c84eab 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4174,6 +4174,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9220,
 /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c49 */
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9230,
 			 quirk_dma_func1_alias);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9235,
+			 quirk_dma_func1_alias);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0642,
 			 quirk_dma_func1_alias);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0645,
-- 
2.39.2.101.g768bb238c484.dirty