pds_core: add simple AER handler

Set up the pci_error_handlers error_detected and resume to be
useful in handling AER events.

Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index 0050c5894563b8a54c21a6b8933b844d63804098..e10451a5a89bb364b0c91b5e736a621bea0c9d01 100644 (file)
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -45,6 +45,7 @@ static void pdsc_unmap_bars(struct pdsc *pdsc)
        for (i = 0; i < PDS_CORE_BARS_MAX; i++) {
                if (bars[i].vaddr)
                        pci_iounmap(pdsc->pdev, bars[i].vaddr);
+               bars[i].vaddr = NULL;
        }
 }
 
@@ -512,10 +513,33 @@ void pdsc_reset_done(struct pci_dev *pdev)
        pdsc_restart_health_thread(pdsc);
 }
 
+static pci_ers_result_t pdsc_pci_error_detected(struct pci_dev *pdev,
+                                               pci_channel_state_t error)
+{
+       if (error == pci_channel_io_frozen) {
+               pdsc_reset_prepare(pdev);
+               return PCI_ERS_RESULT_NEED_RESET;
+       }
+
+       return PCI_ERS_RESULT_NONE;
+}
+
+static void pdsc_pci_error_resume(struct pci_dev *pdev)
+{
+       struct pdsc *pdsc = pci_get_drvdata(pdev);
+
+       if (test_bit(PDSC_S_FW_DEAD, &pdsc->state))
+               pci_reset_function_locked(pdev);
+}
+
 static const struct pci_error_handlers pdsc_err_handler = {
        /* FLR handling */
        .reset_prepare      = pdsc_reset_prepare,
        .reset_done         = pdsc_reset_done,
+
+       /* AER handling */
+       .error_detected     = pdsc_pci_error_detected,
+       .resume             = pdsc_pci_error_resume,
 };
 
 static struct pci_driver pdsc_driver = {