744bfe4c25
Patch from Alessandro Zummo nas100d_power_exit(void) gets some protection to avoid freeing an irq when it is not appropriate to do so. Signed-off-by: Rod Whitby <rod@whitby.id.au> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/*
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* arch/arm/mach-ixp4xx/nas100d-power.c
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*
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* NAS 100d Power/Reset driver
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*
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* Copyright (C) 2005 Tower Technologies
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*
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* based on nas100d-io.c
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* Copyright (C) 2004 Karen Spearel
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*
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* Author: Alessandro Zummo <a.zummo@towertech.it>
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* Maintainers: http://www.nslu2-linux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/interrupt.h>
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#include <asm/mach-types.h>
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extern void ctrl_alt_del(void);
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static irqreturn_t nas100d_reset_handler(int irq, void *dev_id, struct pt_regs *regs)
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{
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/* Signal init to do the ctrlaltdel action, this will bypass init if
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* it hasn't started and do a kernel_restart.
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*/
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ctrl_alt_del();
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return IRQ_HANDLED;
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}
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static int __init nas100d_power_init(void)
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{
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if (!(machine_is_nas100d()))
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return 0;
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set_irq_type(NAS100D_RB_IRQ, IRQT_LOW);
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if (request_irq(NAS100D_RB_IRQ, &nas100d_reset_handler,
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SA_INTERRUPT, "NAS100D reset button", NULL) < 0) {
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printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
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NAS100D_RB_IRQ);
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return -EIO;
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}
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return 0;
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}
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static void __exit nas100d_power_exit(void)
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{
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if (!(machine_is_nas100d()))
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return;
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free_irq(NAS100D_RB_IRQ, NULL);
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}
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module_init(nas100d_power_init);
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module_exit(nas100d_power_exit);
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MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
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MODULE_DESCRIPTION("NAS100D Power/Reset driver");
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MODULE_LICENSE("GPL");
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