mwifiex: pcie: compatible with wifi-only image while extract wifi-part fw

Sometimes, we might using wifi-only firmware with a combo firmware name,
in this case, do not need to filter bluetooth part from header.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Reviewed-by: NBrian Norris <briannorris@chromium.org>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/pcie.c

@@ -1985,7 +1985,8 @@ static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter,
  * (3) wifi image.
  *
  * This function bypass the header and bluetooth part, return
- * the offset of tail wifi-only part.
+ * the offset of tail wifi-only part. If the image is already wifi-only,
+ * that is start with CMD1, return 0.
  */
 
 static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
@@ -1993,7 +1994,7 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
 	const struct mwifiex_fw_data *fwdata;
 	u32 offset = 0, data_len, dnld_cmd;
 	int ret = 0;
-	bool cmd7_before = false;
+	bool cmd7_before = false, first_cmd = false;
 
 	while (1) {
 		/* Check for integer and buffer overflow */
@@ -2014,20 +2015,29 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
 
 		switch (dnld_cmd) {
 		case MWIFIEX_FW_DNLD_CMD_1:
-			if (!cmd7_before) {
-				mwifiex_dbg(adapter, ERROR,
-					    "no cmd7 before cmd1!\n");
+			if (offset + data_len < data_len) {
+				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
 				ret = -1;
 				goto done;
 			}
-			if (offset + data_len < data_len) {
-				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
+
+			/* Image start with cmd1, already wifi-only firmware */
+			if (!first_cmd) {
+				mwifiex_dbg(adapter, MSG,
+					    "input wifi-only firmware\n");
+				return 0;
+			}
+
+			if (!cmd7_before) {
+				mwifiex_dbg(adapter, ERROR,
+					    "no cmd7 before cmd1!\n");
 				ret = -1;
 				goto done;
 			}
 			offset += data_len;
 			break;
 		case MWIFIEX_FW_DNLD_CMD_5:
+			first_cmd = true;
 			/* Check for integer overflow */
 			if (offset + data_len < data_len) {
 				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
@@ -2037,6 +2047,7 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
 			offset += data_len;
 			break;
 		case MWIFIEX_FW_DNLD_CMD_6:
+			first_cmd = true;
 			/* Check for integer overflow */
 			if (offset + data_len < data_len) {
 				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
@@ -2053,6 +2064,7 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
 			}
 			goto done;
 		case MWIFIEX_FW_DNLD_CMD_7:
+			first_cmd = true;
 			cmd7_before = true;
 			break;
 		default: