[PATCH] yenta: fix parent resource determination
If the CardBus windows were pre-configured and the CardBus bridge is behind a
transparent PCI-PCI bridge, pci_find_parent_resource() might return a
different resource than the real parent if it is called before the window is
determined. Therefore, move that call around.
Also fix return of value in void function.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 0e7aa81..5e0a998 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -551,7 +551,7 @@
res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
/* Already allocated? */
if (res->parent)
- return 0;
+ return;
/* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
mask = ~0xfff;
@@ -562,25 +562,23 @@
bus = socket->dev->subordinate;
res->name = bus->name;
res->flags = type;
- res->start = 0;
- res->end = 0;
- root = pci_find_parent_resource(socket->dev, res);
-
- if (!root)
- return;
start = config_readl(socket, offset) & mask;
end = config_readl(socket, offset+4) | ~mask;
if (start && end > start && !override_bios) {
res->start = start;
res->end = end;
- if (request_resource(root, res) == 0)
+ root = pci_find_parent_resource(socket->dev, res);
+ if (root && (request_resource(root, res) == 0))
return;
- printk(KERN_INFO "yenta %s: Preassigned resource %d busy, reconfiguring...\n",
+ printk(KERN_INFO "yenta %s: Preassigned resource %d busy or not available, reconfiguring...\n",
pci_name(socket->dev), nr);
- res->start = res->end = 0;
}
+ res->start = 0;
+ res->end = 0;
+ root = pci_find_parent_resource(socket->dev, res);
+
if (type & IORESOURCE_IO) {
align = 1024;
size = BRIDGE_IO_MAX;
@@ -629,7 +627,7 @@
yenta_allocate_res(socket, 0, IORESOURCE_MEM|IORESOURCE_PREFETCH);
yenta_allocate_res(socket, 1, IORESOURCE_MEM);
yenta_allocate_res(socket, 2, IORESOURCE_IO);
- yenta_allocate_res(socket, 3, IORESOURCE_IO); /* PCI isn't clever enough to use this one yet */
+ yenta_allocate_res(socket, 3, IORESOURCE_IO);
}