[SERIAL] sunzilog: Fix bugs in device deregristration.
1) Need to unregister 2 ports per of_device.
2) Need to of_iounmap() 1 mapping per of_device.
3) Need to free up the IRQ only after all devices
have been unregistered.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index cbdf9d6..98342ee 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -1335,9 +1335,10 @@
return ret;
}
+static int zilog_irq = -1;
+
static int __devinit zs_probe(struct of_device *dev, const struct of_device_id *match)
{
- static int zilog_irq = -1;
struct of_device *op = to_of_device(&dev->dev);
struct uart_sunzilog_port *up;
struct zilog_layout __iomem *rp;
@@ -1413,24 +1414,33 @@
}
}
+ dev_set_drvdata(&dev->dev, &up[0]);
+
return 0;
}
-static int __devexit zs_remove(struct of_device *dev)
+static void __devexit zs_remove_one(struct uart_sunzilog_port *up)
{
- struct uart_sunzilog_port *up = dev_get_drvdata(&dev->dev);
- struct zilog_channel __iomem *channel;
-
if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) {
#ifdef CONFIG_SERIO
serio_unregister_port(&up->serio);
#endif
} else
uart_remove_one_port(&sunzilog_reg, &up->port);
+}
- channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
+static int __devexit zs_remove(struct of_device *dev)
+{
+ struct uart_sunzilog_port *up = dev_get_drvdata(&dev->dev);
+ struct zilog_layout __iomem *regs;
- of_iounmap(channel, sizeof(struct zilog_channel));
+ zs_remove_one(&up[0]);
+ zs_remove_one(&up[1]);
+
+ regs = sunzilog_chip_regs[up[0].port.line / 2];
+ of_iounmap(regs, sizeof(struct zilog_layout));
+
+ dev_set_drvdata(&dev->dev, NULL);
return 0;
}
@@ -1489,6 +1499,11 @@
{
of_unregister_driver(&zs_driver);
+ if (zilog_irq != -1) {
+ free_irq(zilog_irq, sunzilog_irq_chain);
+ zilog_irq = -1;
+ }
+
if (NUM_SUNZILOG) {
uart_unregister_driver(&sunzilog_reg);
sunzilog_free_tables();