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authorDominik Brodowski <linux@dominikbrodowski.net>2005-06-27 16:29:02 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-27 18:03:22 -0700
commitb6d00f0de9e932e2884b3b7af8e43c0a61a271ee (patch)
tree1d9b01dd4136eb4e44083a31f46dd7e7283dd683
parent3248ff43f86493368b321376d447d84fa9a2737d (diff)
[PATCH] ACPI-based PCI resources: PCMCIA bugfix, but resources missing in trees
Don't auto-configure yenta sockets for PCMCIA devices if it is connected to the root PCI bus on the x86 or x86_64 architectures. Previously, this was handled by the "ioport_resource"/"iomem_resource" check a few lines below, but with the new ACPI-based resource handling this doesn't catch all cases any longer. pci-yenta-cardbus-fix.patch and this patch should solve the initialization time trouble. However, the ACPI-based PCI resource handling is badly broken, IMHO: - many resources of devices don't show up in the resource trees ( /proc/iomem and /proc/ioports) any longer. This means that PCMCIA, but also possibly other subsystems (ISA, PnP, ...) do not know which resources it cannot use. - verify_root_windows() should fail if there are no iomem _or_ ioport resources, not only if there are no iomem _and_ ioport resources. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/pcmcia/rsrc_nonstatic.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 51aa04b7ecc..c42455d20eb 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -779,6 +779,17 @@ static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
if (!s->cb_dev || !s->cb_dev->bus)
return -ENODEV;
+#if defined(CONFIG_X86) || defined(CONFIG_X86_64)
+ /* If this is the root bus, the risk of hitting
+ * some strange system devices which aren't protected
+ * by either ACPI resource tables or properly requested
+ * resources is too big. Therefore, don't do auto-adding
+ * of resources at the moment.
+ */
+ if (s->cb_dev->bus->number == 0)
+ return -EINVAL;
+#endif
+
for (i=0; i < PCI_BUS_NUM_RESOURCES; i++) {
res = s->cb_dev->bus->resource[i];
if (!res)