From ab59d9b705e46a04007bf769fb95c39e5caa416e Mon Sep 17 00:00:00 2001
From: Ralph Metzler <rjkm@metzlerbros.de>
Date: Wed, 3 Apr 2019 15:12:02 +0200
Subject: [PATCH] add debugging to MCI timeout

---
 ddbridge/ddbridge-mci.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ddbridge/ddbridge-mci.c b/ddbridge/ddbridge-mci.c
index d7b968f..1322eb9 100644
--- a/ddbridge/ddbridge-mci.c
+++ b/ddbridge/ddbridge-mci.c
@@ -83,10 +83,17 @@ static int ddb_mci_cmd_raw_unlocked(struct mci *state,
 	
 	stat = wait_for_completion_timeout(&state->base->completion, HZ);
 	if (stat == 0) {
+		u32 istat = ddblreadl(link, INTERRUPT_STATUS);
+
 		printk("MCI timeout\n");
 		val = ddblreadl(link, MCI_CONTROL);
 		if (val == 0xffffffff)
 			printk("Lost PCIe link!\n");
+		else {
+			printk("DDBridge IRS %08x\n", istat);
+			if (istat & 1) 
+				ddblwritel(link, istat & 1, INTERRUPT_ACK);
+		}
 		return -EIO;
 	}
 	if (res && res_len)