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Subject[PATCH 08/58] jsm: adding EEH handlers
Date
From: Breno Leitao <leitao@linux.vnet.ibm.com>

Adding EEH handlers for the serial jsm driver. This patch adds
the PCI error handlers and also register them to be called when
a error is detected.

Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Acked-by: Scott Kilau <scottk@digi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/serial/jsm/jsm_driver.c | 46 +++++++++++++++++++++++++++++++++++++++
drivers/serial/jsm/jsm_tty.c | 2 +-
2 files changed, 47 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c
index 48326f7..108c3e0 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;
diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
index 1bcad59..cd95e21 100644
--- a/drivers/serial/jsm/jsm_tty.c
+++ b/drivers/serial/jsm/jsm_tty.c
@@ -430,7 +430,7 @@ int __devinit jsm_tty_init(struct jsm_board *brd)
return 0;
}

-int __devinit jsm_uart_port_init(struct jsm_board *brd)
+int jsm_uart_port_init(struct jsm_board *brd)
{
int i;
unsigned int line;
--
1.6.5.5


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