From 6a931423c918633d4d0cda96df042d7e44ad06b0 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" 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 Signed-off-by: David S. Miller --- 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 75d54ea..d057d9c 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) */ -- 2.7.4