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authorHuacai Chen <chenhc@lemote.com>2018-09-15 09:01:12 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-11-21 11:24:04 +0300
commitf9cb913a7959321bf491b824e5f207a2520cd412 (patch)
tree386fb30a6e70152300f4269cf506d416493f815c /arch/mips/pci
parent983721397fe0a6b2a5937da74b43d4bc0bbb13fe (diff)
downloadlinux-f9cb913a7959321bf491b824e5f207a2520cd412.tar.xz
MIPS/PCI: Call pcie_bus_configure_settings() to set MPS/MRRS
[ Upstream commit 2794f688b2c336e0da85e9f91fed33febbd9f54a ] Call pcie_bus_configure_settings() on MIPS, like for other platforms. The function pcie_bus_configure_settings() makes sure the MPS (Max Payload Size) across the bus is uniform and provides the ability to tune the MRSS (Max Read Request Size) and MPS (Max Payload Size) to higher performance values. Some devices will not operate properly if these aren't set correctly because the firmware doesn't always do it. Signed-off-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Paul Burton <paul.burton@mips.com> Patchwork: https://patchwork.linux-mips.org/patch/20649/ Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Cc: Huacai Chen <chenhuacai@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/mips/pci')
-rw-r--r--arch/mips/pci/pci-legacy.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c
index 0c65c38e05d6..1ae6bc414e2b 100644
--- a/arch/mips/pci/pci-legacy.c
+++ b/arch/mips/pci/pci-legacy.c
@@ -127,8 +127,12 @@ static void pcibios_scanbus(struct pci_controller *hose)
if (pci_has_flag(PCI_PROBE_ONLY)) {
pci_bus_claim_resources(bus);
} else {
+ struct pci_bus *child;
+
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
}
pci_bus_add_devices(bus);
}