qtnfmac: decode error codes from firmware replies

Introduce a function that will map an error code reported in reply
to a firmware command, into one of standard errno codes.
Use additional error codes to improve error reporting
for MAC address changes.

Signed-off-by: Igor Mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/quantenna/qtnfmac/commands.c

@@ -55,6 +55,28 @@ static int qtnf_cmd_check_reply_header(const struct qlink_resp *resp,
 	return 0;
 }
 
+static int qtnf_cmd_resp_result_decode(enum qlink_cmd_result qcode)
+{
+	switch (qcode) {
+	case QLINK_CMD_RESULT_OK:
+		return 0;
+	case QLINK_CMD_RESULT_INVALID:
+		return -EINVAL;
+	case QLINK_CMD_RESULT_ENOTSUPP:
+		return -ENOTSUPP;
+	case QLINK_CMD_RESULT_ENOTFOUND:
+		return -ENOENT;
+	case QLINK_CMD_RESULT_EALREADY:
+		return -EALREADY;
+	case QLINK_CMD_RESULT_EADDRINUSE:
+		return -EADDRINUSE;
+	case QLINK_CMD_RESULT_EADDRNOTAVAIL:
+		return -EADDRNOTAVAIL;
+	default:
+		return -EFAULT;
+	}
+}
+
 static int qtnf_cmd_send_with_reply(struct qtnf_bus *bus,
 				    struct sk_buff *cmd_skb,
 				    struct sk_buff **response_skb,
@@ -810,10 +832,10 @@ static int qtnf_cmd_send_add_change_intf(struct qtnf_vif *vif,
 	if (unlikely(ret))
 		goto out;
 
-	if (unlikely(res_code != QLINK_CMD_RESULT_OK)) {
+	ret = qtnf_cmd_resp_result_decode(res_code);
+	if (ret) {
 		pr_err("VIF%u.%u: CMD %d failed: %u\n", vif->mac->macid,
 		       vif->vifid, cmd_type, res_code);
-		ret = -EFAULT;
 		goto out;
 	}
 

drivers/net/wireless/quantenna/qtnfmac/qlink.h

@@ -674,6 +674,8 @@ enum qlink_cmd_result {
 	QLINK_CMD_RESULT_ENOTSUPP,
 	QLINK_CMD_RESULT_ENOTFOUND,
 	QLINK_CMD_RESULT_EALREADY,
+	QLINK_CMD_RESULT_EADDRINUSE,
+	QLINK_CMD_RESULT_EADDRNOTAVAIL,
 };
 
 /**