ieee1394: add preprocessor constant for invalid csr address

Replace occurrences of the magic value ~(u64)0 for invalid
CSR address spaces by a named constant for better readability.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/ieee1394/csr1212.h b/drivers/ieee1394/csr1212.h
index cecd5871f2de..17ddd72dee4e 100644
--- a/drivers/ieee1394/csr1212.h
+++ b/drivers/ieee1394/csr1212.h
@@ -192,6 +192,7 @@
 
 #define  CSR1212_EXTENDED_ROM_SIZE              (0x10000 * sizeof(u_int32_t))
 
+#define  CSR1212_INVALID_ADDR_SPACE             -1
 
 /* Config ROM image structures */
 struct csr1212_bus_info_block_img {