From 9713ab28ec92d0c44b2ac5765dfc26c619d9cadd Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Tue, 23 Mar 2010 16:05:00 +0100 Subject: pcmcia: do not use ioports < 0x100 on x86 On x86 systems using ACPI _CRS information -- now the default for post-2008 systems -- the PCI root bus no longer pretends to be offering the root ioport_resource. To avoid accidentally hitting some platform / system device, use only I/O ports >= 0x100 for PCMCIA devices on x86. Reported-by: Komuro CC: Bjorn Helgaas Signed-off-by: Dominik Brodowski --- drivers/pcmcia/rsrc_nonstatic.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/pcmcia') diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c index 4663b3fa9f9..dcc602134d9 100644 --- a/drivers/pcmcia/rsrc_nonstatic.c +++ b/drivers/pcmcia/rsrc_nonstatic.c @@ -810,6 +810,13 @@ static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long unsigned long size = end - start + 1; int ret = 0; +#if defined(CONFIG_X86) + /* on x86, avoid anything < 0x100 for it is often used for + * legacy platform devices */ + if (start < 0x100) + start = 0x100; +#endif + if (end < start) return -EINVAL; -- cgit v1.2.3-18-g5258