On Fri, May 21, 2021 at 03:03:24AM +0000, Wang Xingang wrote:
> From: Xingang Wang <wangxingang5@xxxxxxxxxx>
>
> When booting with devicetree, the pci_request_acs() is called after the
> enumeration and initialization of PCI devices, thus the ACS is not
> enabled. And ACS should be enabled when IOMMU is detected for the
> PCI host bridge, so add check for IOMMU before probe of PCI host and call
> pci_request_acs() to make sure ACS will be enabled when enumerating PCI
> devices.
>
> Fixes: 6bf6c24720d33 ("iommu/of: Request ACS from the PCI core when
> configuring IOMMU linkage")
> Signed-off-by: Xingang Wang <wangxingang5@xxxxxxxxxx>
> ---
> drivers/iommu/of_iommu.c | 1 -
> drivers/pci/of.c | 8 +++++++-
> 2 files changed, 7 insertions(+), 2 deletions(-)
Should probably go through the PCI tree, so
Acked-by: Joerg Roedel <jroedel@xxxxxxx>
