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Subject[PATCH] i8259 shutdown method for i386
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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 = {
-
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