Use time.Until(deadline) instead of -time.Since(deadline)

client.go

@@ -907,7 +907,7 @@ type clientURLResponse struct {
 }
 
 func clientGetURLDeadline(dst []byte, url string, deadline time.Time, c clientDoer) (statusCode int, body []byte, err error) {
-	timeout := -time.Since(deadline)
+	timeout := time.Until(deadline)
 	if timeout <= 0 {
 		return 0, dst, ErrTimeout
 	}
@@ -2361,7 +2361,7 @@ func (c *PipelineClient) DoDeadline(req *Request, resp *Response, deadline time.
 func (c *pipelineConnClient) DoDeadline(req *Request, resp *Response, deadline time.Time) error {
 	c.init()
 
-	timeout := -time.Since(deadline)
+	timeout := time.Until(deadline)
 	if timeout < 0 {
 		return ErrTimeout
 	}

fasthttputil/pipeconns.go

@@ -266,7 +266,7 @@ func updateTimer(t *time.Timer, deadline time.Time) <-chan time.Time {
 	if deadline.IsZero() {
 		return nil
 	}
-	d := -time.Since(deadline)
+	d := time.Until(deadline)
 	if d <= 0 {
 		return closedDeadlineCh
 	}

tcpdialer.go

@@ -309,7 +309,7 @@ func (d *TCPDialer) dial(addr string, dualStack bool, timeout time.Duration) (ne
 }
 
 func (d *TCPDialer) tryDial(network string, addr *net.TCPAddr, deadline time.Time, concurrencyCh chan struct{}) (net.Conn, error) {
-	timeout := -time.Since(deadline)
+	timeout := time.Until(deadline)
 	if timeout <= 0 {
 		return nil, ErrDialTimeout
 	}