From: Antonio Borneo <borneo.antonio@gmail.com>
Date: Fri, 6 Aug 2021 21:37:23 +0000 (+0200)
Subject: adi_v5_jtag: clear sticky overrun error
X-Git-Tag: v0.12.0-rc1~181
X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=commitdiff_plain;h=edb575800ae26b4088b71b7531ba3948351bd7a9

adi_v5_jtag: clear sticky overrun error

By accessing invalid AP in JTAG mode, it's possible to trigger the
error:
	JTAG-DP STICKY ERROR
After that the sticky error is never cleared and the whole DAP
gets not anymore accessible.

Clean-up the sticky error once detected.

Change-Id: I8b07263b30f9e46645f0c29084b8f1626e241f45
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6430
Tested-by: jenkins
---

diff --git a/src/target/adi_v5_jtag.c b/src/target/adi_v5_jtag.c
index 9355b84c3b..37019808f7 100644
--- a/src/target/adi_v5_jtag.c
+++ b/src/target/adi_v5_jtag.c
@@ -633,10 +633,10 @@ static int jtagdp_transaction_endcheck(struct adiv5_dap *dap)
 		if (ctrlstat & SSTICKYORUN)
 			LOG_DEBUG("JTAG-DP STICKY OVERRUN");
 
-		/* Clear Sticky Error Bits */
+		/* Clear Sticky Error and Sticky Overrun Bits */
 		retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
 				DP_CTRL_STAT, DPAP_WRITE,
-				dap->dp_ctrl_stat | SSTICKYERR, NULL, 0);
+				dap->dp_ctrl_stat | SSTICKYERR | SSTICKYORUN, NULL, 0);
 		if (retval != ERROR_OK)
 			goto done;