- Checking for the return value of pci map function
 - Implemented Francois Romieu's comments on eliminating code duplication
   using goto
 - Implemented Francois Romieu's comments on using a temporary variable for
   accessing statistics structure
Signed-off-by: NVeena Parat <veena.parat@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>