diff options
| -rw-r--r-- | fs/afs/rxrpc.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 21f43d3acb91..1d075696bf55 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -350,8 +350,17 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, */ tx_total_len = call->request_size; if (call->send_pages) { - tx_total_len += call->last_to - call->first_offset; - tx_total_len += (call->last - call->first) * PAGE_SIZE; + if (call->last == call->first) { + tx_total_len += call->last_to - call->first_offset; + } else { + /* It looks mathematically like you should be able to + * combine the following lines with the ones above, but + * unsigned arithmetic is fun when it wraps... + */ + tx_total_len += PAGE_SIZE - call->first_offset; + tx_total_len += call->last_to; + tx_total_len += (call->last - call->first - 1) * PAGE_SIZE; + } } /* create a call */ |