From: Paul Fertser <fercerpav@gmail.com>
Date: Sun, 17 Aug 2014 08:19:47 +0000 (+0400)
Subject: target/adi_v5_swd: fix segfault when calling jtag_to_swd
X-Git-Tag: v0.9.0-rc1~293
X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=commitdiff_plain;h=f8318d1b0d873ea4b4b78d2d5a71cf52932e4762;ds=sidebyside

target/adi_v5_swd: fix segfault when calling jtag_to_swd

When SWD mode is not supported by the target adapter, the call should
return an error instead of segfaulting.

Change-Id: I1626097deb93ecfbe78a6e82d812c7a673dbbde5
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2256
Tested-by: jenkins
---

diff --git a/src/target/adi_v5_swd.c b/src/target/adi_v5_swd.c
index f8d3650edb..6e322fb411 100644
--- a/src/target/adi_v5_swd.c
+++ b/src/target/adi_v5_swd.c
@@ -253,6 +253,11 @@ int dap_to_swd(struct target *target)
 	struct arm *arm = target_to_arm(target);
 	int retval;
 
+	if (!arm->dap) {
+		LOG_ERROR("SWD mode is not available");
+		return ERROR_FAIL;
+	}
+
 	LOG_DEBUG("Enter SWD mode");
 
 	/* REVISIT it's ugly to need to make calls to a "jtag"