Patch "PCI: Mark 3ware-9650SE Root Port Extended Tags as broken" has been added to the 6.1-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    PCI: Mark 3ware-9650SE Root Port Extended Tags as broken

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pci-mark-3ware-9650se-root-port-extended-tags-as-bro.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9b81241c0f86f27e0ff05304a62545155b6ed26a
Author: Jörg Wedekind <joerg@xxxxxxxxxxx>
Date:   Mon Feb 19 14:28:11 2024 +0100

    PCI: Mark 3ware-9650SE Root Port Extended Tags as broken
    
    [ Upstream commit baf67aefbe7d7deafa59ca49612d163f8889934c ]
    
    Per PCIe r6.1, sec 2.2.6.2 and 7.5.3.4, a Requester may not use 8-bit Tags
    unless its Extended Tag Field Enable is set, but all Receivers/Completers
    must handle 8-bit Tags correctly regardless of their Extended Tag Field
    Enable.
    
    Some devices do not handle 8-bit Tags as Completers, so add a quirk for
    them.  If we find such a device, we disable Extended Tags for the entire
    hierarchy to make peer-to-peer DMA possible.
    
    The 3ware 9650SE seems to have issues with handling 8-bit tags. Mark it as
    broken.
    
    This fixes PCI Parity Errors like :
    
      3w-9xxx: scsi0: ERROR: (0x06:0x000C): PCI Parity Error: clearing.
      3w-9xxx: scsi0: ERROR: (0x06:0x000D): PCI Abort: clearing.
      3w-9xxx: scsi0: ERROR: (0x06:0x000E): Controller Queue Error: clearing.
      3w-9xxx: scsi0: ERROR: (0x06:0x0010): Microcontroller Error: clearing.
    
    Link: https://lore.kernel.org/r/20240219132811.8351-1-joerg@xxxxxxxxxxx
    Fixes: 60db3a4d8cc9 ("PCI: Enable PCIe Extended Tags if supported")
    Closes: https://bugzilla.kernel.org/show_bug.cgi?id=202425
    Signed-off-by: Jörg Wedekind <joerg@xxxxxxxxxxx>
    Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 51d634fbdfb8e..c175b70a984c6 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5415,6 +5415,7 @@ static void quirk_no_ext_tags(struct pci_dev *pdev)
 
 	pci_walk_bus(bridge->bus, pci_configure_extended_tags, NULL);
 }
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_3WARE, 0x1004, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0132, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0140, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0141, quirk_no_ext_tags);