PCI aer: add pci_cleanup_aer_correct_aer_status

Function to clear bogus correctable errors. Analog to pci_aer_uncorrect_are_status.
The Marvell chips seem to start out with a bogus value that needs to be
cleared.

Yanmin ported it to 2.6.22-rc4 by fixing a fuzz patch applying info.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Acked-by: Zhang Yanmin <yanmin.zhang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 18 insertions, 0 deletions

diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index fef159a68081..92a8469b21ba 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -117,6 +117,21 @@ int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
         return 0;
 }
 
+int pci_cleanup_aer_correct_error_status(struct pci_dev *dev)
+{
+        int pos;
+        u32 status;
+
+        pos = pci_find_aer_capability(dev);
+        if (!pos)
+                return -EIO;
+
+        pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
+        pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, status);
+
+        return 0;
+}
+
 static int find_device_iter(struct device *device, void *data)
 {
         struct pci_dev *dev;
@@ -741,4 +756,5 @@ EXPORT_SYMBOL_GPL(pci_find_aer_capability);
 EXPORT_SYMBOL_GPL(pci_enable_pcie_error_reporting);
 EXPORT_SYMBOL_GPL(pci_disable_pcie_error_reporting);
 EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
+EXPORT_SYMBOL_GPL(pci_cleanup_aer_correct_error_status);
 
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 64aacaed8d6c..509656286e53 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -13,11 +13,13 @@ extern int pci_enable_pcie_error_reporting(struct pci_dev *dev);
 extern int pci_find_aer_capability(struct pci_dev *dev);
 extern int pci_disable_pcie_error_reporting(struct pci_dev *dev);
 extern int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
+extern int pci_cleanup_aer_correct_error_status(struct pci_dev *dev);
 #else
 #define pci_enable_pcie_error_reporting(dev)            (-EINVAL)
 #define pci_find_aer_capability(dev)                    (0)
 #define pci_disable_pcie_error_reporting(dev)           (-EINVAL)
 #define pci_cleanup_aer_uncorrect_error_status(dev)     (-EINVAL)
+#define pci_cleanup_aer_correct_error_status(dev)       (-EINVAL)
 #endif
 
 #endif //_AER_H_