diff options
| -rw-r--r-- | drivers/pci/pcie/aer/aerdrv.h | 5 | ||||
| -rw-r--r-- | drivers/pci/pcie/aer/aerdrv_core.c | 22 | ||||
| -rw-r--r-- | include/linux/pci.h | 3 |
3 files changed, 25 insertions, 5 deletions
diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h index 94a7598eb262..22f840f4dda1 100644 --- a/drivers/pci/pcie/aer/aerdrv.h +++ b/drivers/pci/pcie/aer/aerdrv.h @@ -87,6 +87,9 @@ struct aer_broadcast_data { static inline pci_ers_result_t merge_result(enum pci_ers_result orig, enum pci_ers_result new) { + if (new == PCI_ERS_RESULT_NO_AER_DRIVER) + return PCI_ERS_RESULT_NO_AER_DRIVER; + if (new == PCI_ERS_RESULT_NONE) return orig; @@ -97,7 +100,7 @@ static inline pci_ers_result_t merge_result(enum pci_ers_result orig, break; case PCI_ERS_RESULT_DISCONNECT: if (new == PCI_ERS_RESULT_NEED_RESET) - orig = new; + orig = PCI_ERS_RESULT_NEED_RESET; break; default: break; diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c index af4e31cd3a3b..421bbc5fee32 100644 --- a/drivers/pci/pcie/aer/aerdrv_core.c +++ b/drivers/pci/pcie/aer/aerdrv_core.c @@ -232,13 +232,27 @@ static int report_error_detected(struct pci_dev *dev, void *data) dev->driver ? "no AER-aware driver" : "no driver"); } - goto out; + + /* + * If there's any device in the subtree that does not + * have an error_detected callback, returning + * PCI_ERS_RESULT_NO_AER_DRIVER prevents calling of + * the subsequent mmio_enabled/slot_reset/resume + * callbacks of "any" device in the subtree. All the + * devices in the subtree are left in the error state + * without recovery. + */ + + if (!(dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)) + vote = PCI_ERS_RESULT_NO_AER_DRIVER; + else + vote = PCI_ERS_RESULT_NONE; + } else { + err_handler = dev->driver->err_handler; + vote = err_handler->error_detected(dev, result_data->state); } - err_handler = dev->driver->err_handler; - vote = err_handler->error_detected(dev, result_data->state); result_data->result = merge_result(result_data->result, vote); -out: device_unlock(&dev->dev); return 0; } diff --git a/include/linux/pci.h b/include/linux/pci.h index 5b37d643b6b3..a98a5f9ac1d5 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -538,6 +538,9 @@ enum pci_ers_result { /* Device driver is fully recovered and operational */ PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5, + + /* No AER capabilities registered for the driver */ + PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6, }; /* PCI bus error event callbacks */ |