From 4fa97dcf9d48b02934c60a48873199850351e760 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 29 Jun 2006 15:13:40 -0700 Subject: [PATCH] [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 --- drivers/serial/sunzilog.c | 29 ++++++++++++++++++++++------- 1 file changed, 22 insertions(+), 7 deletions(-) diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c index cbdf9d605b3..98342eeba73 100644 --- a/drivers/serial/sunzilog.c +++ b/drivers/serial/sunzilog.c @@ -1335,9 +1335,10 @@ static int __devinit zs_get_instance(struct device_node *dp) 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 @@ static int __devinit zs_probe(struct of_device *dev, const struct of_device_id * } } + 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; + + zs_remove_one(&up[0]); + zs_remove_one(&up[1]); - of_iounmap(channel, sizeof(struct zilog_channel)); + 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 @@ static void __exit sunzilog_exit(void) { 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(); -- 2.41.1