Messages in this thread | | | From | Xingang Wang <> | Subject | Re: [PATCH v4] iommu/of: Fix pci_request_acs() before enumerating PCI devices | Date | Mon, 7 Jun 2021 20:43:53 +0800 |
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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@huawei.com> >> >> 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@huawei.com> >> --- >> 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@suse.de> > > . >
Thanks
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