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pcmcia: do not use ioports < 0x100 on x86

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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 <komurojun-mbn@nifty.com>
CC: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2010-03-23 16:05:00 +01:00
parent 5cbb2b941d
commit 9713ab28ec
1 changed files with 7 additions and 0 deletions
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7
drivers/pcmcia/rsrc_nonstatic.c
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@ -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;