On 2021/6/4 23:36, Joerg Roedel wrote:
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> .
Thanks .
