The endpoint observing AER_FATAL error might be connected to a PCI hotplug
slot. Performing secondary bus reset on a hotplug slot causes PCI link
up/down interrupts.
Hotplug driver removes the device from system when a link down interrupt
is observed and performs re-enumeration when link up interrupt is observed.
This conflicts with what this code is trying to do. Try secondary bus
reset only if pci_reset_slot() fails/unsupported.
Signed-off-by: Sinan Kaya <ok...@codeaurora.org>
---
drivers/pci/pcie/aer/aerdrv.c | 3 ++-
drivers/pci/pcie/aer/aerdrv_core.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pcie/aer/aerdrv.c b/drivers/pci/pcie/aer/aerdrv.c
index 779b387..4eaa524 100644
--- a/drivers/pci/pcie/aer/aerdrv.c
+++ b/drivers/pci/pcie/aer/aerdrv.c
@@ -318,7 +318,8 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK;
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32);
- pci_reset_bridge_secondary_bus(dev);
+ if (pci_reset_slot(dev->slot))
+ pci_reset_bridge_secondary_bus(dev);
pci_printk(KERN_DEBUG, dev, "Root Port link has been reset\n");
/* Clear Root Error Status */
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c
b/drivers/pci/pcie/aer/aerdrv_core.c
index 0ea5acc..a915b0e6 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -407,7 +407,8 @@ static pci_ers_result_t broadcast_error_message(struct
pci_dev *dev,
*/
static pci_ers_result_t default_reset_link(struct pci_dev *dev)
{
- pci_reset_bridge_secondary_bus(dev);
+ if (pci_reset_slot(dev->slot))
+ pci_reset_bridge_secondary_bus(dev);
pci_printk(KERN_DEBUG, dev, "downstream link has been reset\n");
return PCI_ERS_RESULT_RECOVERED;
}
--
2.7.4
