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

Message ID 20200813082622.6850-1-koba.ko@canonical.com
Headers show
Series Enable PCI ACS for platform opt to get the usb flash drive from WD19TB | expand

Message

Koba Ko Aug. 13, 2020, 8:26 a.m. UTC
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(-)

Comments

Timo Aaltonen Aug. 14, 2020, 12:39 p.m. UTC | #1
On 13.8.2020 11.26, Koba Ko wrote:
> 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(-)
> 

applied to oem-5.6, thanks