PCI: fix AER driver error information

Below patch fixes aer driver error information and enables aer driver
although CONFIG_ACPI=n.

As a matter of fact, the new patch is created from below 2 patches plus
a minor patch apply fuzz fixing. Because the second patch fixed a compilation
error introduced by the first patch, I merge them to facilitate bisect.


1) http://marc.info/?l=linux-kernel&m=117783233918191&w=2;
2) http://marc.info/?l=linux-mm-commits&m=118046936720790&w=2


Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/pci-acpi.c

@@ -55,8 +55,6 @@ acpi_query_osc (
 
 	status = acpi_evaluate_object(handle, "_OSC", &input, &output);
 	if (ACPI_FAILURE (status)) {
-		printk(KERN_DEBUG  
-			"Evaluate _OSC Set fails. Status = 0x%04x\n", status);
 		*ret_status = status;
 		return status;
 	}
@@ -124,11 +122,9 @@ acpi_run_osc (
 	in_params[3].buffer.pointer 	= (u8 *)context;
 
 	status = acpi_evaluate_object(handle, "_OSC", &input, &output);
-	if (ACPI_FAILURE (status)) {
+	if (ACPI_FAILURE (status))
-		printk(KERN_DEBUG  
-			"Evaluate _OSC Set fails. Status = 0x%04x\n", status);
 		return status;
-	}
+
 	out_obj = output.pointer;
 	if (out_obj->type != ACPI_TYPE_BUFFER) {
 		printk(KERN_DEBUG  

drivers/pci/pcie/aer/Kconfig

@@ -4,7 +4,7 @@
 
 config PCIEAER
 	boolean "Root Port Advanced Error Reporting support"
-	depends on PCIEPORTBUS && ACPI
+	depends on PCIEPORTBUS
 	default y
 	help
 	  This enables PCI Express Root Port Advanced Error Reporting

drivers/pci/pcie/aer/Makefile

@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_PCIEAER) += aerdriver.o
 
-aerdriver-objs := aerdrv_errprint.o aerdrv_core.o aerdrv.o aerdrv_acpi.o
+aerdriver-objs := aerdrv_errprint.o aerdrv_core.o aerdrv.o
+aerdriver-$(CONFIG_ACPI) += aerdrv_acpi.o
 

drivers/pci/pcie/aer/aerdrv.h

@@ -19,10 +19,6 @@
 #define AER_ERROR_MASK			0x001fffff
 #define AER_ERROR(d)			(d & AER_ERROR_MASK)
 
-#define OSC_METHOD_RUN_SUCCESS		0
-#define OSC_METHOD_NOT_SUPPORTED	1
-#define OSC_METHOD_RUN_FAILURE		2
-
 /* Root Error Status Register Bits */
 #define ROOT_ERR_STATUS_MASKS			0x0f
 
@@ -121,6 +117,14 @@ extern void aer_delete_rootport(struct aer_rpc *rpc);
 extern int aer_init(struct pcie_device *dev);
 extern void aer_isr(struct work_struct *work);
 extern void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
-extern int aer_osc_setup(struct pci_dev *dev);
+
+#ifdef CONFIG_ACPI
+extern int aer_osc_setup(struct pcie_device *pciedev);
+#else
+static inline int aer_osc_setup(struct pcie_device *pciedev)
+{
+	return 0;
+}
+#endif
 
 #endif //_AERDRV_H_

drivers/pci/pcie/aer/aerdrv_acpi.c

@@ -20,19 +20,18 @@
 
 /**
  * aer_osc_setup - run ACPI _OSC method
+ * @pciedev: pcie_device which AER is being enabled on
  *
- * Return:
+ * @return: Zero on success. Nonzero otherwise.
- *	Zero if success. Nonzero for otherwise.
  *
  * Invoked when PCIE bus loads AER service driver. To avoid conflict with
  * BIOS AER support requires BIOS to yield AER control to OS native driver.
  **/
-int aer_osc_setup(struct pci_dev *dev)
+int aer_osc_setup(struct pcie_device *pciedev)
 {
-	int retval = OSC_METHOD_RUN_SUCCESS;
+	acpi_status status = AE_NOT_FOUND;
-	acpi_status status;
+	struct pci_dev *pdev = pciedev->port;
-	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+	acpi_handle handle = DEVICE_ACPI_HANDLE(&pdev->dev);
-	struct pci_dev *pdev = dev;
 	struct pci_bus *parent;
 
 	while (!handle) {
@@ -50,19 +49,20 @@ int aer_osc_setup(struct pci_dev *dev)
 		pdev = parent->self;
 	}
 
-	if (!handle)
+	if (handle) {
-		return OSC_METHOD_NOT_SUPPORTED;
+		pci_osc_support_set(OSC_EXT_PCI_CONFIG_SUPPORT);
-
+		status = pci_osc_control_set(handle,
-	pci_osc_support_set(OSC_EXT_PCI_CONFIG_SUPPORT);
+					OSC_PCI_EXPRESS_AER_CONTROL |
-	status = pci_osc_control_set(handle, OSC_PCI_EXPRESS_AER_CONTROL |
+					OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
-		OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
-	if (ACPI_FAILURE(status)) {
-		if (status == AE_SUPPORT)
-			retval = OSC_METHOD_NOT_SUPPORTED;
-	 	else
-			retval = OSC_METHOD_RUN_FAILURE;
 	}
 
-	return retval;
+	if (ACPI_FAILURE(status)) {
-}
+		printk(KERN_DEBUG "AER service couldn't init device %s - %s\n",
+		    pciedev->device.bus_id,
+		    (status == AE_SUPPORT || status == AE_NOT_FOUND) ?
+		    "no _OSC support" : "Run ACPI _OSC fails");
+		return -1;
+	}
 
+	return 0;
+}

drivers/pci/pcie/aer/aerdrv_core.c

@@ -22,8 +22,6 @@
 #include <linux/errno.h>
 #include <linux/pm.h>
 #include <linux/suspend.h>
-#include <linux/acpi.h>
-#include <linux/pci-acpi.h>
 #include <linux/delay.h>
 #include "aerdrv.h"
 
@@ -733,20 +731,8 @@ void aer_delete_rootport(struct aer_rpc *rpc)
  **/
 int aer_init(struct pcie_device *dev)
 {
-	int status;
+	if (aer_osc_setup(dev) && !forceload)
-
+		return -ENXIO;
-	/* Run _OSC Method */
-	status = aer_osc_setup(dev->port);
-
-	if(status != OSC_METHOD_RUN_SUCCESS) {
-		printk(KERN_DEBUG "%s: AER service init fails - %s\n",
-		__FUNCTION__,
-		(status == OSC_METHOD_NOT_SUPPORTED) ?
-			"No ACPI _OSC support" : "Run ACPI _OSC fails");
-
-		if (!forceload)
-			return status;
-	}
 
 	return AER_SUCCESS;
 }