From: Eric W. Biederman <ebiederm@xmission.com>
This patch disables interrupt generation from the legacy pic on reboot. Now
that there is a sys_device class it should not be called while drivers are
still using interrupts.
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/arch/i386/kernel/i8259.c | 12 ++++++++++++
1 files changed, 12 insertions(+)
diff -puN arch/i386/kernel/i8259.c~kexec-i8259-shutdowni386 arch/i386/kernel/i8259.c
--- 25/arch/i386/kernel/i8259.c~kexec-i8259-shutdowni386 Fri Aug 20 15:21:55 2004
+++ 25-akpm/arch/i386/kernel/i8259.c Fri Aug 20 15:21:55 2004
@@ -270,10 +270,22 @@ static int i8259A_suspend(struct sys_dev
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"),
.suspend = i8259A_suspend,
.resume = i8259A_resume,
+ .shutdown = i8259A_shutdown,
};
static struct sys_device device_i8259A = {
_