AFS: Use patched rxrpc_kernel_send_data() correctly

Fix afs_send_simple_reply() to accept a greater-than-zero return value from
rxrpc_kernel_send_data() as being a successful return rather than thinking it
an error and aborting the call.

rxrpc_kernel_send_data() previously returned zero incorrectly when it worked
successfully, but has been patched to return the number of bytes it
transmitted.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/afs/rxrpc.c

@@ -792,6 +792,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 {
 	struct msghdr msg;
 	struct iovec iov[1];
+	int n;
 
 	_enter("");
 
@@ -806,22 +807,20 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 	msg.msg_flags		= 0;
 
 	call->state = AFS_CALL_AWAIT_ACK;
-	switch (rxrpc_kernel_send_data(call->rxcall, &msg, len)) {
-	case 0:
+	n = rxrpc_kernel_send_data(call->rxcall, &msg, len);
+	if (n >= 0) {
 		_leave(" [replied]");
 		return;
-
-	case -ENOMEM:
+	}
+	if (n == -ENOMEM) {
 		_debug("oom");
 		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
-	default:
+	}
 	rxrpc_kernel_end_call(call->rxcall);
 	call->rxcall = NULL;
 	call->type->destructor(call);
 	afs_free_call(call);
 	_leave(" [error]");
-		return;
-	}
 }
 
 /*