[SCSI] mpt2sas: Added support for PCIe Advanced Error Recovery.

Added support in the driver to support EEH and
PCIe Advanced Error Recovery. This involves adding new
pci_error_handler interface for recovering the controller from PCI Bus
errors, such as SERR and PERR. Some tools are available for simulating
PCI errors in order to validate this interface:
http://www.kernel.org/pub/linux/utils/pci/aer-inject

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index f980b8822f92..b04ccad7d972 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -58,6 +58,7 @@
 #include <linux/sort.h>
 #include <linux/io.h>
 #include <linux/time.h>
+#include <linux/aer.h>
 
 #include "mpt2sas_base.h"
 
@@ -1256,6 +1257,9 @@ mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc)
                 goto out_fail;
         }
 
+        /* AER (Advanced Error Reporting) hooks */
+        pci_enable_pcie_error_reporting(pdev);
+
         pci_set_master(pdev);
 
         if (_base_config_dma_addressing(ioc, pdev) != 0) {
@@ -1311,6 +1315,7 @@ mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc)
         ioc->chip_phys = 0;
         ioc->pci_irq = -1;
         pci_release_selected_regions(ioc->pdev, ioc->bars);
+        pci_disable_pcie_error_reporting(pdev);
         pci_disable_device(pdev);
         return r;
 }
@@ -3547,6 +3552,7 @@ mpt2sas_base_free_resources(struct MPT2SAS_ADAPTER *ioc)
         ioc->pci_irq = -1;
         ioc->chip_phys = 0;
         pci_release_selected_regions(ioc->pdev, ioc->bars);
+        pci_disable_pcie_error_reporting(pdev);
         pci_disable_device(pdev);
         return;
 }