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Subject[PATCH v8 05/14] PCI/ERR: Use "bridge" for clarity in pcie_do_recovery()
Date
From: Sean V Kelley <sean.v.kelley@intel.com>

A generic term such as "bridge" may be used for something with
a subordinate bus. The mix of ports would benefit from a use of
the term. Further clarity can be had in pcie_do_recovery()
with use of pci_upstream_bridge() in place of dev->bus->self.
Reverse the pcie_do_recovery() conditional logic and replace
use of "dev" with "bridge".

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
drivers/pci/pcie/err.c | 28 +++++++++++++++++-----------
1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index 950612342f1c..e68ea5243ff2 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -152,20 +152,26 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
{
pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER;
struct pci_bus *bus;
+ struct pci_dev *bridge;
+ int type;

/*
- * Error recovery runs on all subordinates of the first downstream port.
- * If the downstream port detected the error, it is cleared at the end.
+ * Error recovery runs on all subordinates of the first downstream
+ * bridge. If the downstream bridge detected the error, it is
+ * cleared at the end.
*/
- if (!(pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
- pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM))
- dev = dev->bus->self;
- bus = dev->subordinate;
-
+ type = pci_pcie_type(dev);
+ if (type == PCI_EXP_TYPE_ROOT_PORT ||
+ type == PCI_EXP_TYPE_DOWNSTREAM)
+ bridge = dev;
+ else
+ bridge = pci_upstream_bridge(dev);
+
+ bus = bridge->subordinate;
pci_dbg(dev, "broadcast error_detected message\n");
if (state == pci_channel_io_frozen) {
pci_walk_bus(bus, report_frozen_detected, &status);
- status = reset_subordinate_device(dev);
+ status = reset_subordinate_device(bridge);
if (status != PCI_ERS_RESULT_RECOVERED) {
pci_warn(dev, "subordinate device reset failed\n");
goto failed;
@@ -197,9 +203,9 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
pci_dbg(dev, "broadcast resume message\n");
pci_walk_bus(bus, report_resume, &status);

- if (pcie_aer_is_native(dev))
- pcie_clear_device_status(dev);
- pci_aer_clear_nonfatal_status(dev);
+ if (pcie_aer_is_native(bridge))
+ pcie_clear_device_status(bridge);
+ pci_aer_clear_nonfatal_status(bridge);
pci_info(dev, "device recovery successful\n");
return status;

--
2.28.0
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