From: Dominik Brodowski <linux@dominikbrodowski.net>
Date: Tue, 23 Mar 2010 15:05:00 +0000 (+0100)
Subject: pcmcia: do not use ioports < 0x100 on x86
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9713ab28ec92d0c44b2ac5765dfc26c619d9cadd;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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>
---

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 4663b3fa9f96..dcc602134d90 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;