[PATCH] pci: yenta cardbus fix

On Mon, Jun 20, 2005 at 07:15:34PM +1000, Grant Coady wrote:
> Yenta: CardBus bridge found at 0000:00:0b.0 [1179:0001]
> yenta 0000:00:0b.0: Preassigned resource 0 busy, reconfiguring...

In -mm1 the cardbus resources might be assigned in
pci_assign_unassigned_resources() pass. From your dmesg:
PCI: Bus 2, cardbus bridge: 0000:00:0b.0
  IO window: 00002000-00002fff
  IO window: 00003000-00003fff
  PREFETCH window: 12000000-13ffffff
  MEM window: 14000000-15ffffff

Then yenta_allocate_res() tries to assign these resources again and,
naturally, fails.

This adds check for already assigned cardbus resources.
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/pcmcia/yenta_socket.c

@@ -549,6 +549,11 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
 	unsigned offset;
 	unsigned mask;
 
+	res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
+	/* Already allocated? */
+	if (res->parent)
+		return 0;
+
 	/* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
 	mask = ~0xfff;
 	if (type & IORESOURCE_IO)
@@ -556,7 +561,6 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
 
 	offset = 0x1c + 8*nr;
 	bus = socket->dev->subordinate;
-	res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
 	res->name = bus->name;
 	res->flags = type;
 	res->start = 0;