Gitweb: http://git.kernel.org/linus/9713ab28ec92d0c44b2ac5765dfc26c619d9cadd
Commit: 9713ab28ec92d0c44b2ac5765dfc26c619d9cadd
Parent: 5cbb2b941d2cc77e6b915e8e55d375be632c9f6a
Author: Dominik Brodowski <linux@dominikbrodowski.net>
AuthorDate: Tue Mar 23 16:05:00 2010 +0100
Committer: Dominik Brodowski <linux@dominikbrodowski.net>
CommitDate: Tue Mar 23 18:55:23 2010 +0100
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>
---
drivers/pcmcia/rsrc_nonstatic.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 4663b3f..dcc6021 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;
--
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