diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index c1aa89cefaec..08f63930da8b 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -383,7 +383,6 @@ int line_setup_irq(int fd, int input, int output, struct line *line, void *data)
 		err = um_request_irq(driver->write_irq, fd, IRQ_WRITE,
 					line_write_interrupt, flags,
 					driver->write_irq_name, data);
-	line->have_irq = 1;
 	return err;
 }
 
diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index 6cb05a22e9b0..0a1834719dba 100644
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -56,7 +56,6 @@ struct line {
 	int sigio;
 	struct delayed_work task;
 	const struct line_driver *driver;
-	int have_irq;
 };
 
 extern void line_close(struct tty_struct *tty, struct file * filp);