diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2006-07-17 21:07:17 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-07-21 14:18:08 -0700 |
| commit | 67e23a1e60b6bc0a090407d0fc060166ab558b72 (patch) | |
| tree | a690bed9a849ba177b046e76cb85f3209650ae55 /drivers/serial/sunzilog.c | |
| parent | 39329329565a5e24f0a5523eef3a9dd941e0b29d (diff) | |
| download | linux-next-67e23a1e60b6bc0a090407d0fc060166ab558b72.tar.gz | |
[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: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/serial/sunzilog.c')
| -rw-r--r-- | drivers/serial/sunzilog.c | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c index a1456d9352cb..496810c50947 100644 --- a/drivers/serial/sunzilog.c +++ b/drivers/serial/sunzilog.c @@ -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) |