From: Maciej W. Rozycki Date: Fri, 21 Nov 2014 14:10:02 +0000 (+0000) Subject: defxx: Disable DEFEA's ESIC I/O decoding on shutdown X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6a931423c918633d4d0cda96df042d7e44ad06b0;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 --- diff --git a/drivers/net/fddi/defxx.c b/drivers/net/fddi/defxx.c index 75d54ea72c56..d057d9c2cf5e 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) */