On Thu, 1 Apr 2021 15:27:37 +0300 Leon Romanovsky <l...@kernel.org> wrote:
> On Thu, Apr 01, 2021 at 05:37:16AM +0000, Raphael Norwitz wrote: > > Slot resets are bus resets with additional logic to prevent a device > > from being removed during the reset. Currently slot and bus resets have > > separate implementations in pci.c, complicating higher level logic. As > > discussed on the mailing list, they should be combined into a generic > > function which performs an SBR. This change adds a function, > > pci_reset_bus_function(), which first attempts a slot reset and then > > attempts a bus reset if -ENOTTY is returned, such that there is now a > > single device agnostic function to perform an SBR. > > > > This new function is also needed to add SBR reset quirks and therefore > > is exposed in pci.h. > > > > Link: https://lkml.org/lkml/2021/3/23/911 > > > > Suggested-by: Alex Williamson <alex.william...@redhat.com> > > Signed-off-by: Amey Narkhede <ameynarkhed...@gmail.com> > > Signed-off-by: Raphael Norwitz <raphael.norw...@nutanix.com> > > --- > > drivers/pci/pci.c | 17 +++++++++-------- > > include/linux/pci.h | 1 + > > 2 files changed, 10 insertions(+), 8 deletions(-) > > > > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c > > index 16a17215f633..12a91af2ade4 100644 > > --- a/drivers/pci/pci.c > > +++ b/drivers/pci/pci.c > > @@ -4982,6 +4982,13 @@ static int pci_dev_reset_slot_function(struct > > pci_dev *dev, int probe) > > return pci_reset_hotplug_slot(dev->slot->hotplug, probe); > > } > > > > +int pci_reset_bus_function(struct pci_dev *dev, int probe) > > +{ > > + int rc = pci_dev_reset_slot_function(dev, probe); > > + > > + return (rc == -ENOTTY) ? pci_parent_bus_reset(dev, probe) : rc; > > The previous coding style is preferable one in the Linux kernel. > int rc = pci_dev_reset_slot_function(dev, probe); > if (rc != -ENOTTY) > return rc; > return pci_parent_bus_reset(dev, probe); That'd be news to me, do you have a reference? I've never seen complaints for ternaries previously. Thanks, Alex
