From 6a931423c918633d4d0cda96df042d7e44ad06b0 Mon Sep 17 00:00:00 2001
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Date: Fri, 21 Nov 2014 14:10:02 +0000
Subject: [PATCH] defxx: Disable DEFEA's ESIC I/O decoding on shutdown
Make sure the option card does not respond after shutdown by disabling
it via ESIC's Expansion Board Control register. Also disable memory and
port I/O decoders, the latter in particular to disable slot-specific I/O
decoding that otherwise remains active even in the board is disabled.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/fddi/defxx.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/fddi/defxx.c b/drivers/net/fddi/defxx.c
index 75d54ea72c56a..d057d9c2cf5e4 100644
--- a/drivers/net/fddi/defxx.c
+++ b/drivers/net/fddi/defxx.c
@@ -856,6 +856,12 @@ static void dfx_bus_uninit(struct net_device *dev)
val = inb(base_addr + PI_ESIC_K_IO_CONFIG_STAT_0);
val &= ~PI_CONFIG_STAT_0_M_INT_ENB;
outb(val, base_addr + PI_ESIC_K_IO_CONFIG_STAT_0);
+
+ /* Disable the board. */
+ outb(0, base_addr + PI_ESIC_K_SLOT_CNTRL);
+
+ /* Disable memory and port decoders. */
+ outb(0, base_addr + PI_ESIC_K_FUNCTION_CNTRL);
}
if (dfx_bus_pci) {
/* Disable interrupts at PCI bus interface chip (PFI) */