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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>
This commit is contained in:
Maciej W. Rozycki 2014-11-21 14:10:02 +00:00 committed by David S. Miller
parent fef85fc466
commit 6a931423c9
1 changed files with 6 additions and 0 deletions
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6
drivers/net/fddi/defxx.c
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@ -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) */