madwifi - ath_pci: cannot reserve PCI memory region

(http://martin.wojtczyk.de/index.php?title=Leonardo1#Installation_of_the_madwifi_driver)

After the installation of the madwifi driver it seemed that there was still a memory allocation error:

ath_pci: cannot reserve PCI memory region

According to http://www.linuxquestions.org/questions/archive/41/2004/08/4/189870 I modified the file /usr/src/linux/drivers/pcmcia/yenta.c in function yenta_allocate_res from:

mask = ~0xfff;

to:

mask = ~0xffff;

to increase the granularity of the memory allocation. Afterwards the ath0 device came up properly.