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Commit 67e23a1e authored by David S. Miller's avatar David S. Miller
Browse files

[SERIAL] sunzilog: Register IRQ after all devices have been probed. 



Otherwise we will deref half-initialized channel pointers
and crash in the interrupt handler.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 39329329

drivers/serial/sunzilog.c

+35 −11
Original line number Diff line number Diff line
@@ -1336,12 +1336,11 @@ static int __devinit zs_get_instance(struct device_node *dp) 


static int zilog_irq = -1;



static int __devinit zs_probe(struct of_device *dev, const struct of_device_id *match)

static int __devinit zs_probe(struct of_device *op, const struct of_device_id *match)

{

	struct of_device *op = to_of_device(&dev->dev);

	struct uart_sunzilog_port *up;

	struct zilog_layout __iomem *rp;

	int inst = zs_get_instance(dev->node);

	int inst = zs_get_instance(op->node);

	int err;



	sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0,
@@ -1413,7 +1412,7 @@ static int __devinit zs_probe(struct of_device *dev, const struct of_device_id * 
		}

	}



	dev_set_drvdata(&dev->dev, &up[0]);

	dev_set_drvdata(&op->dev, &up[0]);



	return 0;

}
@@ -1462,18 +1461,19 @@ static struct of_platform_driver zs_driver = { 
static int __init sunzilog_init(void)

{

	struct device_node *dp;

	int err;

	int err, uart_count;



	NUM_SUNZILOG = 0;

	for_each_node_by_name(dp, "zs")

		NUM_SUNZILOG++;



	uart_count = 0;

	if (NUM_SUNZILOG) {

		int uart_count;



		err = sunzilog_alloc_tables();

		if (err)

			return err;

			goto out;



		/* Subtract 1 for keyboard, 1 for mouse.  */

		uart_count = (NUM_SUNZILOG * 2) - 2;
@@ -1481,17 +1481,41 @@ static int __init sunzilog_init(void) 
		sunzilog_reg.nr = uart_count;

		sunzilog_reg.minor = sunserial_current_minor;

		err = uart_register_driver(&sunzilog_reg);

		if (err) {

			sunzilog_free_tables();

			return err;

		}

		if (err)

			goto out_free_tables;



		sunzilog_reg.tty_driver->name_base = sunzilog_reg.minor - 64;

		sunzilog_reg.cons = SUNZILOG_CONSOLE();



		sunserial_current_minor += uart_count;

	}



	return of_register_driver(&zs_driver, &of_bus_type);

	err = of_register_driver(&zs_driver, &of_bus_type);

	if (err)

		goto out_unregister_uart;



	if (zilog_irq != -1) {

		err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED,

				  "zs", sunzilog_irq_chain);

		if (err)

			goto out_unregister_driver;

	}



out:

	return err;



out_unregister_driver:

	of_unregister_driver(&zs_driver);



out_unregister_uart:

	if (NUM_SUNZILOG) {

		uart_unregister_driver(&sunzilog_reg);

		sunzilog_reg.cons = NULL;

	}



out_free_tables:

	sunzilog_free_tables();

	goto out;

}



static void __exit sunzilog_exit(void)