[SRU][OEM-5.6][PATCH 0/1] Enable PCI ACS for platform opt to get the usb flash drive from WD19TB

[Koba Ko]

BugLink: https://bugs.launchpad.net/bugs/1891449

[Impact]
Connect with the WD19TB on the right TB port and plug the USB flash
drive on it, the machine can't recognize the USB flash drive.

[Fix]
Enable the PCI ACS when Intel IOMMU is detected with platform opt in hint.

[test]
With the fix, the machine can get the USB flash drive.

[Regression Potential]
Low. the patch has landed on the mainline kernel.

Lu Baolu (1):
  iommu/vt-d: Enable PCI ACS for platform opt in hint

 drivers/iommu/dmar.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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2.25.1