ichsmb: shutdown interrupts to prevent spurious interrupts after kexec

Obtained from:	Hewlett Packard Enterprise
Rebiewed by:	jhb, jhibbits

3 files changed, 13 insertions, 0 deletions

diff --git a/sys/dev/ichsmb/ichsmb.c b/sys/dev/ichsmb/ichsmb.c
index c5e9e2f1b9ed..e40a8a8a3886 100644
--- a/sys/dev/ichsmb/ichsmb.c
+++ b/sys/dev/ichsmb/ichsmb.c
@@ -703,4 +703,15 @@ ichsmb_detach(device_t dev)
 	return 0;
 }
 
+int
+ichsmb_shutdown(device_t dev)
+{
+	const sc_p sc = device_get_softc(dev);
+
+	/* Disable interrupts */
+	bus_write_1(sc->io_res, ICH_HST_CNT, 0);
+
+	return (0);
+}
+
 DRIVER_MODULE(smbus, ichsmb, smbus_driver, 0, 0);
diff --git a/sys/dev/ichsmb/ichsmb_pci.c b/sys/dev/ichsmb/ichsmb_pci.c
index e4d87fe1fed2..9ffb1de62dac 100644
--- a/sys/dev/ichsmb/ichsmb_pci.c
+++ b/sys/dev/ichsmb/ichsmb_pci.c
@@ -243,6 +243,7 @@ static device_method_t ichsmb_pci_methods[] = {
         DEVMETHOD(device_probe, ichsmb_pci_probe),
         DEVMETHOD(device_attach, ichsmb_pci_attach),
         DEVMETHOD(device_detach, ichsmb_detach),
+        DEVMETHOD(device_shutdown, ichsmb_shutdown),
 
 	/* SMBus methods */
         DEVMETHOD(smbus_callback, ichsmb_callback),
diff --git a/sys/dev/ichsmb/ichsmb_var.h b/sys/dev/ichsmb/ichsmb_var.h
index 7fb14804d3c4..8aeaf403781b 100644
--- a/sys/dev/ichsmb/ichsmb_var.h
+++ b/sys/dev/ichsmb/ichsmb_var.h
@@ -84,6 +84,7 @@ extern void	ichsmb_release_resources(sc_p sc);
 extern int	ichsmb_probe(device_t dev);
 extern int	ichsmb_attach(device_t dev);
 extern int	ichsmb_detach(device_t dev);
+extern int	ichsmb_shutdown(device_t dev);
 
 #endif /* _DEV_ICHSMB_ICHSMB_VAR_H */