On Tue, Jun 10, 2014 at 8:32 AM, Murali Karicheri [off-list ref] wrote:

On 5/30/2014 11:44 AM, Bjorn Helgaas wrote:

quoted

On Wed, May 28, 2014 at 01:14:53PM -0400, Murali Karicheri wrote:

quoted

Call pcie_bus_configure_settings on ARM, like for other platforms.
pcie_bus_configure_settings makes sure the MPS across the bus is
uniform and provides the ability to tune the MRSS and MPS to higher
performance values. This is particularly important for embedded where
there is no firmware to program these PCI-E settings for the OS.

Signed-off-by: Murali Karicheri <redacted>

I applied this to pci/misc for v3.16.  Russell, let me know if you object
or prefer another route, and I can drop it.  I tweaked the changelog but
didn't touch the actual patch, so I think git will do the right thing if
it
arrives via two trees.

Bjorn,

I checked git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git
pci/misc branch
I don't see it. Is it a different repo?

It's already in Linus' tree and I cleaned out pci/misc for the next cycle.

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b5742ad156d30ee38486652cdbd152e2d6ebbcc

quoted

quoted

CC: Russell King <redacted>
CC: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Jason Gunthorpe <redacted>
CC: Santosh Shilimkar <redacted>
---
  - Fixed comments against initial version
  arch/arm/kernel/bios32.c |   12 ++++++++++++
  1 file changed, 12 insertions(+)

diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 16d43cd..17a26c1 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c

@@ -545,6 +545,18 @@ void pci_common_init_dev(struct device *parent,

struct hw_pci *hw)
                 */
                pci_bus_add_devices(bus);
        }
+
+       list_for_each_entry(sys, &head, node) {
+               struct pci_bus *bus = sys->bus;
+
+               /* Configure PCI Express settings */
+               if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
+                       struct pci_bus *child;
+
+                       list_for_each_entry(child, &bus->children, node)
+                               pcie_bus_configure_settings(child);
+               }
+       }
  }
    #ifndef CONFIG_PCI_HOST_ITE8152
--
1.7.9.5