}
			return b, err
		}
		read += int64(n)
		if want >= 0 && read == want {
			// No need to read more...
			return b, nil
		}
	}
}

// getDeadline will truncate the deadline so it is at least 1ms and at most MaxDeadline.
func getDeadline(d time.Duration) time.Duration {
	if d < time.Millisecond {
		return 0
	}
	if d > MaxDeadline {
		return MaxDeadline
	}
	return d
}