On Fri, 25 Oct 2024 15:27:54 -0700 Keith Busch <kbusch@xxxxxxxx> wrote: > From: Keith Busch <kbusch@xxxxxxxxxx> > > Resetting a bus from an end device only works if it's the only function > on or below that bus. > > Provide an attribute on the pci_dev bridge device that can perform the > secondary bus reset. This makes it possible for a user to safely reset > multiple devices in a single command using the secondary bus reset > action. > > Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx> > --- > v1->v2: > > Moved the attribute from the pci_bus to the bridge's pci_dev > > And renamed it to "reset_subordinate" to distinguish from other > existing device "reset" attributes. > > Added documentation. > > Follow up patch to warn if the action was potentially harmful. > > Documentation/ABI/testing/sysfs-bus-pci | 11 +++++++++++ > drivers/pci/pci-sysfs.c | 23 +++++++++++++++++++++++ > drivers/pci/pci.c | 2 +- > drivers/pci/pci.h | 1 + > 4 files changed, 36 insertions(+), 1 deletion(-) Reviewed-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
