Hi Bjorn, Just confirming that when switched from dev->bus->self to pci_upstream_bridge() we’re okay with the NULL case:
> On Nov 20, 2020, at 4:10 PM, Sean V Kelley <[email protected]> wrote: > > Use pci_upstream_bridge() in place of dev->bus->self. No functional change > intended. > > [bhelgaas: split to separate patch] > Link: > https://lore.kernel.org/r/[email protected] > Signed-off-by: Sean V Kelley <[email protected]> > Signed-off-by: Bjorn Helgaas <[email protected]> > Acked-by: Jonathan Cameron <[email protected]> > Reviewed-by: Kuppuswamy Sathyanarayanan > <[email protected]> > --- > drivers/pci/pcie/err.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c > index db149c6ce4fb..05f61da5ed9d 100644 > --- a/drivers/pci/pcie/err.c > +++ b/drivers/pci/pcie/err.c > @@ -159,7 +159,7 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, > */ > if (!(pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT || > pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM)) > - dev = dev->bus->self; > + dev = pci_upstream_bridge(dev); The only case where pci_upstream_bridge(dev) could be NULL is if dev->bus is the root bus and we are being selective based on the type. Even later in this series when we actually add in RC_EC/RC_END we maintain the conditional checks: https://lore.kernel.org/linux-pci/[email protected]/ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, @@ -174,10 +180,13 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, /* * Error recovery runs on all subordinates of the bridge. If the - * bridge detected the error, it is cleared at the end. + * bridge detected the error, it is cleared at the end. For RCiEPs + * we should reset just the RCiEP itself. */ if (type == PCI_EXP_TYPE_ROOT_PORT || - type == PCI_EXP_TYPE_DOWNSTREAM) + type == PCI_EXP_TYPE_DOWNSTREAM || + type == PCI_EXP_TYPE_RC_EC || + type == PCI_EXP_TYPE_RC_END) bridge = dev; else bridge = pci_upstream_bridge(dev); I believe we are okay here. Sean > bus = dev->subordinate; > > pci_dbg(dev, "broadcast error_detected message\n"); > -- > 2.29.2 > >
