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serial: 8250: Fix initialisation of Quatech cards with the AMCC PCI chip

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Fix the initialisation of older Quatech serial cards which are fitted with
the AMCC PCI Matchmaker interface chip.

Signed-off-by: Jonathan Woithe (jwoithe@just42.net)
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jonathan Woithe 2013-12-09 16:33:08 +10:30 committed by Greg Kroah-Hartman
parent e12348c6d0
commit 9c5320f8d7
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/8250/8250_pci.c
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@ -1259,10 +1259,10 @@ static int pci_quatech_init(struct pci_dev *dev)
unsigned long base = pci_resource_start(dev, 0);
if (base) {
u32 tmp;
outl(inl(base + 0x38), base + 0x38);
outl(inl(base + 0x38) | 0x00002000, base + 0x38);
tmp = inl(base + 0x3c);
outl(tmp | 0x01000000, base + 0x3c);
outl(tmp, base + 0x3c);
outl(tmp &= ~0x01000000, base + 0x3c);
}
}
return 0;