Commit 9713ab28 authored Mar 23, 2010 by Dominik Brodowski

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 <komurojun-mbn@nifty.com>
CC: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

parent 5cbb2b94

drivers/pcmcia/rsrc_nonstatic.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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;