Merge branch 'pci/err'

- Recognize disconnected devices so we don't bother trying to set them to
  "frozen" or "normal" state (Christoph Hellwig)

- Clear PCI Status register during enumeration in case firmware left errors
  logged (Kai-Heng Feng)

- Configure ECRC for every device, including hot-added ones (Stefan Roese)

- Keep AER error reporting enabled for switches (Stefan Roese)

- Enable error reporting for all devices that support AER (Stefan Roese)

- Iterate over error counters instead of error strings to avoid printing
  junk in AER sysfs counters (Mohamed Khalfella)

* pci/err:
  PCI/AER: Iterate over error counters instead of error strings
  PCI/AER: Enable error reporting when AER is native
  PCI/portdrv: Don't disable AER reporting in get_port_device_capability()
  PCI/AER: Configure ECRC for every device
  PCI: Clear PCI_STATUS when setting up device
  PCI/ERR: Recognize disconnected devices in report_error_detected()

4 files changed, 23 insertions, 16 deletions

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 7952e5efd6cf..e2d8a74f83c3 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -392,6 +392,11 @@ void pci_aer_init(struct pci_dev *dev)
 	pci_add_ext_cap_save_buffer(dev, PCI_EXT_CAP_ID_ERR, sizeof(u32) * n);
 
 	pci_aer_clear_status(dev);
+
+	if (pci_aer_available())
+		pci_enable_pcie_error_reporting(dev);
+
+	pcie_set_ecrc_checking(dev);
 }
 
 void pci_aer_exit(struct pci_dev *dev)
@@ -538,7 +543,7 @@ static const char *aer_agent_string[] = {
 	u64 *stats = pdev->aer_stats->stats_array;			\
 	size_t len = 0;							\
 									\
-	for (i = 0; i < ARRAY_SIZE(strings_array); i++) {		\
+	for (i = 0; i < ARRAY_SIZE(pdev->aer_stats->stats_array); i++) {\
 		if (strings_array[i])					\
 			len += sysfs_emit_at(buf, len, "%s %llu\n",	\
 					     strings_array[i],		\
@@ -1228,9 +1233,6 @@ static int set_device_error_reporting(struct pci_dev *dev, void *data)
 			pci_disable_pcie_error_reporting(dev);
 	}
 
-	if (enable)
-		pcie_set_ecrc_checking(dev);
-
 	return 0;
 }
 
@@ -1347,6 +1349,11 @@ static int aer_probe(struct pcie_device *dev)
 	struct device *device = &dev->device;
 	struct pci_dev *port = dev->port;
 
+	BUILD_BUG_ON(ARRAY_SIZE(aer_correctable_error_string) <
+		     AER_MAX_TYPEOF_COR_ERRS);
+	BUILD_BUG_ON(ARRAY_SIZE(aer_uncorrectable_error_string) <
+		     AER_MAX_TYPEOF_UNCOR_ERRS);
+
 	/* Limit to Root Ports or Root Complex Event Collectors */
 	if ((pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC) &&
 	    (pci_pcie_type(port) != PCI_EXP_TYPE_ROOT_PORT))
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index 0c5a143025af..59c90d04a609 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -55,10 +55,14 @@ static int report_error_detected(struct pci_dev *dev,
 
 	device_lock(&dev->dev);
 	pdrv = dev->driver;
-	if (!pci_dev_set_io_state(dev, state) ||
-		!pdrv ||
-		!pdrv->err_handler ||
-		!pdrv->err_handler->error_detected) {
+	if (pci_dev_is_disconnected(dev)) {
+		vote = PCI_ERS_RESULT_DISCONNECT;
+	} else if (!pci_dev_set_io_state(dev, state)) {
+		pci_info(dev, "can't recover (state transition %u -> %u invalid)\n",
+			dev->error_state, state);
+		vote = PCI_ERS_RESULT_NONE;
+	} else if (!pdrv || !pdrv->err_handler ||
+		   !pdrv->err_handler->error_detected) {
 		/*
 		 * If any device in the subtree does not have an error_detected
 		 * callback, PCI_ERS_RESULT_NO_AER_DRIVER prevents subsequent
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 604feeb84ee4..1ac7fec47d6f 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -222,15 +222,8 @@ static int get_port_device_capability(struct pci_dev *dev)
 
 #ifdef CONFIG_PCIEAER
 	if (dev->aer_cap && pci_aer_available() &&
-	    (pcie_ports_native || host->native_aer)) {
+	    (pcie_ports_native || host->native_aer))
 		services |= PCIE_PORT_SERVICE_AER;
-
-		/*
-		 * Disable AER on this port in case it's been enabled by the
-		 * BIOS (the AER service driver will enable it when necessary).
-		 */
-		pci_disable_pcie_error_reporting(dev);
-	}
 #endif
 
 	/* Root Ports and Root Complex Event Collectors may generate PMEs */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 4948531481d1..9884d8b29d3b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1890,6 +1890,9 @@ int pci_setup_device(struct pci_dev *dev)
 
 	dev->broken_intx_masking = pci_intx_mask_broken(dev);
 
+	/* Clear errors left from system firmware */
+	pci_write_config_word(dev, PCI_STATUS, 0xffff);
+
 	switch (dev->hdr_type) {		    /* header type */
 	case PCI_HEADER_TYPE_NORMAL:		    /* standard header */
 		if (class == PCI_CLASS_BRIDGE_PCI)