wl1271: Check result code of commands

Check the result code of all commands, and return an error code if the
firmware reports an error in execution. Previously this error would go
ignored in most cases.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_cmd.c

@@ -74,6 +74,15 @@ int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len)
 		intr = wl1271_spi_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
 	}
 
+	/* read back the status code of the command */
+	wl1271_spi_read(wl, wl->cmd_box_addr, cmd,
+			sizeof(struct wl1271_cmd_header), false);
+
+	if (cmd->status != CMD_STATUS_SUCCESS) {
+		wl1271_error("command execute failure %d", cmd->status);
+		ret = -EIO;
+	}
+
 	wl1271_spi_write32(wl, ACX_REG_INTERRUPT_ACK,
 			   WL1271_ACX_INTR_CMD_COMPLETE);
 
@@ -306,7 +315,6 @@ int wl1271_cmd_test(struct wl1271 *wl, void *buf, size_t buf_len, u8 answer)
 
 	if (answer) {
 		struct wl1271_command *cmd_answer;
-		u16 status;
 
 		/*
 		 * The test command got in, we can read the answer.
@@ -316,10 +324,6 @@ int wl1271_cmd_test(struct wl1271 *wl, void *buf, size_t buf_len, u8 answer)
 		wl1271_spi_read(wl, wl->cmd_box_addr, buf, buf_len, false);
 
 		cmd_answer = buf;
-		status = le16_to_cpu(cmd_answer->header.status);
-
-		if (status != CMD_STATUS_SUCCESS)
-			wl1271_error("TEST command answer error: %d", status);
 	}
 
 	return 0;
@@ -354,11 +358,6 @@ int wl1271_cmd_interrogate(struct wl1271 *wl, u16 id, void *buf, size_t len)
 	/* the interrogate command got in, we can read the answer */
 	wl1271_spi_read(wl, wl->cmd_box_addr, buf, len, false);
 
-	acx = buf;
-	if (le16_to_cpu(acx->cmd.status) != CMD_STATUS_SUCCESS)
-		wl1271_error("INTERROGATE command error: %d",
-			     le16_to_cpu(acx->cmd.status));
-
 out:
 	return ret;
 }
@@ -507,11 +506,6 @@ int wl1271_cmd_read_memory(struct wl1271 *wl, u32 addr, void *answer,
 
 	/* the read command got in, we can now read the answer */
 	wl1271_spi_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd), false);
-
-	if (le16_to_cpu(cmd->header.status) != CMD_STATUS_SUCCESS)
-		wl1271_error("error in read command result: %d",
-			     le16_to_cpu(cmd->header.status));
-
 	memcpy(answer, cmd->value, len);
 
 out:
@@ -639,17 +633,7 @@ int wl1271_cmd_scan(struct wl1271 *wl, u8 *ssid, size_t len,
 	ret = wl1271_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 	if (ret < 0) {
 		wl1271_error("SCAN failed");
-		goto out;
-	}
-
-	wl1271_spi_read(wl, wl->cmd_box_addr, params, sizeof(*params),
-			false);
-
-	if (le16_to_cpu(params->header.status) != CMD_STATUS_SUCCESS) {
-		wl1271_error("Scan command error: %d",
-			     le16_to_cpu(params->header.status));
 		wl->scanning = false;
-		ret = -EIO;
 		goto out;
 	}
 

drivers/net/wireless/wl12xx/wl1271_init.c

@@ -303,12 +303,15 @@ int wl1271_hw_init(struct wl1271 *wl)
 {
 	int ret;
 
+	/* FIXME: the following parameter setting functions return error
+	 * codes - the reason is so far unknown. The -EIO is therefore
+	 * ignored for the time being. */
 	ret = wl1271_init_general_parms(wl);
-	if (ret < 0)
+	if (ret < 0 && ret != -EIO)
 		return ret;
 
 	ret = wl1271_init_radio_parms(wl);
-	if (ret < 0)
+	if (ret < 0 && ret != -EIO)
 		return ret;
 
 	/* Template settings */