From 7696eea94eba9997d5644822732613a663a09fc3 Mon Sep 17 00:00:00 2001
From: RichardG867 <richardg867@gmail.com>
Date: Thu, 17 Feb 2022 16:44:49 -0300
Subject: [PATCH] isapnp: Check if a card has a valid ROM before allowing it to
 be isolated

---
 src/device/isapnp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/device/isapnp.c b/src/device/isapnp.c
index 2b75969ce..18b11ba3d 100644
--- a/src/device/isapnp.c
+++ b/src/device/isapnp.c
@@ -268,7 +268,7 @@ isapnp_read_data(uint16_t addr, void *priv)
 	case 0x01: /* Serial Isolation */
 		card = dev->first_card;
 		while (card) {
-			if (card->enable && (card->state == PNP_STATE_ISOLATION))
+			if (card->enable && card->rom && (card->state == PNP_STATE_ISOLATION))
 				break;
 			card = card->next;
 		}