On Fri, 18 Jun 2010 11:48:29 -0700 Yinghai Lu <yinghai@xxxxxxxxxx> wrote: > On 06/18/2010 10:23 AM, Jesse Barnes wrote: > > On Tue, 15 Jun 2010 22:33:53 -0700 > > "Justin P. Mattock" <justinmattock@xxxxxxxxx> wrote: > > > >> The below patch fixes a warning message when using gcc 4.6.0 > >> CC drivers/pci/setup-bus.o > >> drivers/pci/setup-bus.c: In function 'pci_assign_unassigned_bridge_resources': > >> drivers/pci/setup-bus.c:868:6: warning: variable 'retval' set but not used > >> > >> Signed-off-by: Justin P. Mattock <justinmattock@xxxxxxxxx> > >> > >> --- > >> drivers/pci/setup-bus.c | 2 -- > >> 1 files changed, 0 insertions(+), 2 deletions(-) > >> > >> diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c > >> index 19b1113..215590b 100644 > >> --- a/drivers/pci/setup-bus.c > >> +++ b/drivers/pci/setup-bus.c > >> @@ -865,7 +865,6 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) > >> struct pci_bus *parent = bridge->subordinate; > >> int tried_times = 0; > >> struct resource_list_x head, *list; > >> - int retval; > >> unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | > >> IORESOURCE_PREFETCH; > >> > >> @@ -874,7 +873,6 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) > >> again: > >> pci_bus_size_bridges(parent); > >> __pci_bridge_assign_resources(bridge, &head); > >> - retval = pci_reenable_device(bridge); > >> pci_set_master(bridge); > >> pci_enable_bridges(parent); > >> > > I sent following patch several weeks ago, can you put that in pci-next? > > Subject: [PATCH] pciehp: Enable bridges at last for multiple try assigning > > Found one PCIe Module with several bridges "cold" hotadd doesn't work. > > the root cause: > 1. BIOS assign small range the parent bridges. > 2. First try for hotadd only can make some bridges get resource assigned. > 3. Second will update parent bridge res, get right sizes for all child bridges > and devices, but resource for child bridges are not set to HW register. > Because first try already enable those bridges, so __pci_bridge_assign_resource > skip the setting step. > > So try to move enabling of child bridges to last and only do that one time > > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> Yeah I had a hard time following the changelog, but just looked it over. Looks safe, but Justin will still need to check the return value on pci_reenable_device. Justin, we don't want a message on every reenable, just on ones that fail. So can you protect your printk with if (retval) instead? You'll need to refresh it based on my linux-next branch in a few minutes, as I'm pushing Yinghai's patch now. -- Jesse Barnes, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
