From bb93af50c31dd50a17cb822e672c209816921c0b Mon Sep 17 00:00:00 2001
From: Gareth McMullin <gareth@blacksphere.co.nz>
Date: Mon, 27 Mar 2017 09:05:37 +1300
Subject: [PATCH] adiv5: Debug log on failure to read ROM table.

---
 src/target/adiv5.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/target/adiv5.c b/src/target/adiv5.c
index 18de968..ed30f69 100644
--- a/src/target/adiv5.c
+++ b/src/target/adiv5.c
@@ -268,6 +268,11 @@ static void adiv5_component_probe(ADIv5_AP_t *ap, uint32_t addr)
 		cidr |= ((uint64_t)(x & 0xff)) << (i * 8);
 	}
 
+	if (adiv5_dp_error(ap->dp)) {
+		DEBUG("Fault reading ID registers\n");
+		return;
+	}
+
 	/* CIDR preamble sanity check */
 	if ((cidr & ~CID_CLASS_MASK) != CID_PREAMBLE) {
 		DEBUG("0x%"PRIx32": 0x%"PRIx32" <- does not match preamble (0x%X)\n",
@@ -281,6 +286,10 @@ static void adiv5_component_probe(ADIv5_AP_t *ap, uint32_t addr)
 	if (cid_class == cidc_romtab) { /* ROM table, probe recursively */
 		for (int i = 0; i < 256; i++) {
 			uint32_t entry = adiv5_mem_read32(ap, addr + i*4);
+			if (adiv5_dp_error(ap->dp)) {
+				DEBUG("Fault reading ROM table entry\n");
+			}
+
 			if (entry == 0)
 				break;