speakup: Simplify spk_ttyio_out error handling.

This avoids most code indentation
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20210126222147.3848175-4-samuel.thibault@ens-lyon.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/accessibility/speakup/spk_ttyio.c

@@ -225,27 +225,29 @@ void spk_ttyio_unregister_ldisc(void)
 static int spk_ttyio_out(struct spk_synth *in_synth, const char ch)
 {
 	struct tty_struct *tty = in_synth->dev;
+	int ret;
+
+	if (!in_synth->alive || !tty->ops->write)
+		return 0;
 
-	if (in_synth->alive && tty->ops->write) {
-		int ret = tty->ops->write(tty, &ch, 1);
-
-		if (ret == 0)
-			/* No room */
-			return 0;
-		if (ret < 0) {
-			pr_warn("%s: I/O error, deactivating speakup\n",
-				in_synth->long_name);
-			/* No synth any more, so nobody will restart TTYs,
-			 * and we thus need to do it ourselves.  Now that there
-			 * is no synth we can let application flood anyway
-			 */
-			in_synth->alive = 0;
-			speakup_start_ttys();
-			return 0;
-		}
+	ret = tty->ops->write(tty, &ch, 1);
+
+	if (ret == 0)
+		/* No room */
+		return 0;
+
+	if (ret > 0)
+		/* Success */
 		return 1;
-	}
 
+	pr_warn("%s: I/O error, deactivating speakup\n",
+		in_synth->long_name);
+	/* No synth any more, so nobody will restart TTYs,
+	 * and we thus need to do it ourselves.  Now that there
+	 * is no synth we can let application flood anyway
+	 */
+	in_synth->alive = 0;
+	speakup_start_ttys();
 	return 0;
 }