Messages in this thread Patch in this message |  | | Subject | [PATCH] i8259 shutdown method for i386 | From | (Eric W. Biederman) | Date | 20 Aug 2004 02:43:06 -0600 |
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Greg, Now that you have added sys_device support to the generic device support. This patch to shutdown the i8259A interrupt controller on reboot should now be safe.
Eric
diff -uNr linux-2.6.8.1/arch/i386/kernel/i8259.c linux-2.6.8.1-i8259-shutdown.i386/arch/i386/kernel/i8259.c --- linux-2.6.8.1/arch/i386/kernel/i8259.c Wed Aug 18 14:54:26 2004 +++ linux-2.6.8.1-i8259-shutdown.i386/arch/i386/kernel/i8259.c Wed Aug 18 14:58:56 2004 @@ -244,9 +244,21 @@ return 0; } +static int i8259A_shutdown(struct sys_device *dev) +{ + /* Put the i8259A into a quiescent state that + * the kernel initialization code can get it + * out of. + */ + outb(0xff, 0x21); /* mask all of 8259A-1 */ + outb(0xff, 0xA1); /* mask all of 8259A-1 */ + return 0; +} + static struct sysdev_class i8259_sysdev_class = { set_kset_name("i8259"), .resume = i8259A_resume, + .shutdown = i8259A_shutdown, }; static struct sys_device device_i8259A = { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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