Previously we checked for invalid MPS settings, i.e., a device with MPS
different than its upstream bridge, in pcie_bus_detect_mps(). We only did
this if the arch or hotplug driver called pcie_bus_configure_settings(),
and then only if PCIe bus tuning was disabled (PCIE_BUS_TUNE_OFF).
Move the MPS checking code to pci_configure_device(), so we do it in the
pci_device_add() path for every device.
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
---
drivers/pci/probe.c | 43 ++++++++++++++++++++++++-------------------
1 file changed, 24 insertions(+), 19 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 9ff4df0..eb32395 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1275,6 +1275,27 @@ int pci_setup_device(struct pci_dev *dev)
return 0;
}
+static void pci_configure_mps(struct pci_dev *dev)
+{
+ struct pci_dev *bridge = pci_upstream_bridge(dev);
+ int mps, p_mps;
+
+ if (!pci_is_pcie(dev) || !bridge || !pci_is_pcie(bridge))
+ return;
+
+ mps = pcie_get_mps(dev);
+ p_mps = pcie_get_mps(bridge);
+
+ if (mps == p_mps)
+ return;
+
+ if (pcie_bus_config == PCIE_BUS_TUNE_OFF) {
+ dev_warn(&dev->dev, "Max Payload Size %d, but upstream %s set to %d; if necessary, use \"pci=pcie_bus_safe\" and report a bug\n",
+ mps, pci_name(bridge), p_mps);
+ return;
+ }
+}
+
static struct hpp_type0 pci_default_type0 = {
.revision = 1,
.cache_line_size = 8,
@@ -1396,6 +1417,8 @@ static void pci_configure_device(struct pci_dev *dev)
struct hotplug_params hpp;
int ret;
+ pci_configure_mps(dev);
+
memset(&hpp, 0, sizeof(hpp));
ret = pci_get_hp_params(dev, &hpp);
if (ret)
@@ -1791,22 +1814,6 @@ static void pcie_write_mrrs(struct pci_dev *dev)
dev_err(&dev->dev, "MRRS was unable to be configured with a safe value. If problems are experienced, try running with pci=pcie_bus_safe\n");
}
-static void pcie_bus_detect_mps(struct pci_dev *dev)
-{
- struct pci_dev *bridge = dev->bus->self;
- int mps, p_mps;
-
- if (!bridge)
- return;
-
- mps = pcie_get_mps(dev);
- p_mps = pcie_get_mps(bridge);
-
- if (mps != p_mps)
- dev_warn(&dev->dev, "Max Payload Size %d, but upstream %s set to %d; if necessary, use \"pci=pcie_bus_safe\" and report a bug\n",
- mps, pci_name(bridge), p_mps);
-}
-
static int pcie_bus_configure_set(struct pci_dev *dev, void *data)
{
int mps, orig_mps;
@@ -1814,10 +1821,8 @@ static int pcie_bus_configure_set(struct pci_dev *dev, void *data)
if (!pci_is_pcie(dev))
return 0;
- if (pcie_bus_config == PCIE_BUS_TUNE_OFF) {
- pcie_bus_detect_mps(dev);
+ if (pcie_bus_config == PCIE_BUS_TUNE_OFF)
return 0;
- }
mps = 128 << *(u8 *)data;
orig_mps = pcie_get_mps(dev);
--
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