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ccid: generate proper error for short messages

Change-Id: I3bf0bebd361666a2f3d0341444415a6f25d2b4bf
---
M ccid_common/ccid_device.c
1 file changed, 3 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ccid-firmware refs/changes/18/42318/1

diff --git a/ccid_common/ccid_device.c b/ccid_common/ccid_device.c
index 8a53860..7866d9f 100644
--- a/ccid_common/ccid_device.c
+++ b/ccid_common/ccid_device.c
@@ -836,8 +836,10 @@
 
 short_msg:
 	LOGP(DCCID, LOGL_ERROR, "Short CCID message received: %s; ignoring\n", msgb_hexdump(msg));
+	resp = gen_err_resp(ch->bMessageType, ch->bSlot, get_icc_status(cs), ch->bSeq,
+			    CCID_ERR_CMD_NOT_SUPPORTED);
 	msgb_free(msg);
-	return -1;
+	return ccid_slot_send_unbusy(cs, resp);
 }
 
 /* Section 5.3.1 ABORT */

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