xen-netback: remove pointless clause from if statement
xen-netback: remove pointless clause from if statement

This patch removes a test in start_new_rx_buffer() that checks whether
a copy operation is less than MAX_BUFFER_OFFSET in length, since
MAX_BUFFER_OFFSET is defined to be PAGE_SIZE and the only caller of
start_new_rx_buffer() already limits copy operations to PAGE_SIZE or less.

Signed-off-by: Paul Durrant <dba6cd059c0054f8a3c62ba902cd9d7238853ee4@citrix.com>
Cc: Ian Campbell <9be92b3dbbd6611e3e4c9209fb3d04b4919e7cca@citrix.com>
Cc: Wei Liu <a5240e9e4c4d742e3a4232ca749f78defd45d722@citrix.com>
Cc: Sander Eikelenboom <ba324ca7b1c77fc20bb970d5aff6eea9377918a5@eikelenboom.it>
Reported-By: Sander Eikelenboom <ba324ca7b1c77fc20bb970d5aff6eea9377918a5@eikelenboom.it>
Tested-By: Sander Eikelenboom <ba324ca7b1c77fc20bb970d5aff6eea9377918a5@eikelenboom.it>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs