1 files changed, 46 insertions, 0 deletions

diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c
index 48326f75a81e..108c3e0471fd 100644
--- a/drivers/serial/jsm/jsm_driver.c
+++ b/drivers/serial/jsm/jsm_driver.c
@@ -48,6 +48,17 @@ struct uart_driver jsm_uart_driver = {
         .nr             = NR_PORTS,
 };
 
+static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
+                                       pci_channel_state_t state);
+static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);
+static void jsm_io_resume(struct pci_dev *pdev);
+
+static struct pci_error_handlers jsm_err_handler = {
+        .error_detected = jsm_io_error_detected,
+        .slot_reset = jsm_io_slot_reset,
+        .resume = jsm_io_resume,
+};
+
 int jsm_debug;
 module_param(jsm_debug, int, 0);
 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
@@ -164,6 +175,7 @@ static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device
         }
 
         pci_set_drvdata(pdev, brd);
+        pci_save_state(pdev);
 
         return 0;
  out_free_irq:
@@ -222,8 +234,42 @@ static struct pci_driver jsm_driver = {
         .id_table       = jsm_pci_tbl,
         .probe          = jsm_probe_one,
         .remove         = __devexit_p(jsm_remove_one),
+        .err_handler    = &jsm_err_handler,
 };
 
+static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
+                                        pci_channel_state_t state)
+{
+        struct jsm_board *brd = pci_get_drvdata(pdev);
+
+        jsm_remove_uart_port(brd);
+
+        return PCI_ERS_RESULT_NEED_RESET;
+}
+
+static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
+{
+        int rc;
+
+        rc = pci_enable_device(pdev);
+
+        if (rc)
+                return PCI_ERS_RESULT_DISCONNECT;
+
+        pci_set_master(pdev);
+
+        return PCI_ERS_RESULT_RECOVERED;
+}
+
+static void jsm_io_resume(struct pci_dev *pdev)
+{
+        struct jsm_board *brd = pci_get_drvdata(pdev);
+
+        pci_restore_state(pdev);
+
+        jsm_uart_port_init(brd);
+}
+
 static int __init jsm_init_module(void)
 {
         int rc;