wifi: iwlwifi: improve tag handling in iwl_request_firmware

We can remove the intermediary string conversion and use drv->fw_index
in the final snprintf directly.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20230127002430.175bfffdf2f5.I7ec7a29b2d93a977cb0a39dbcc7c875032eb14b7@changeidSigned-off-by: Gregory Greenman <gregory.greenman@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-drv.c

@@ -163,7 +163,6 @@ static void iwl_req_fw_callback(const struct firmware *ucode_raw,
 static int iwl_request_firmware(struct iwl_drv *drv, bool first)
 {
 	const struct iwl_cfg *cfg = drv->trans->cfg;
-	char tag[8];
 
 	if (drv->trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_9000 &&
 	    (drv->trans->hw_rev_step != SILICON_B_STEP &&
@@ -174,13 +173,10 @@ static int iwl_request_firmware(struct iwl_drv *drv, bool first)
 		return -EINVAL;
 	}
 
-	if (first) {
+	if (first)
 		drv->fw_index = cfg->ucode_api_max;
-		sprintf(tag, "%d", drv->fw_index);
-	} else {
+	else
 		drv->fw_index--;
-		sprintf(tag, "%d", drv->fw_index);
-	}
 
 	if (drv->fw_index < cfg->ucode_api_min) {
 		IWL_ERR(drv, "no suitable firmware found!\n");
@@ -200,8 +196,8 @@ static int iwl_request_firmware(struct iwl_drv *drv, bool first)
 		return -ENOENT;
 	}
 
-	snprintf(drv->firmware_name, sizeof(drv->firmware_name), "%s%s.ucode",
-		 cfg->fw_name_pre, tag);
+	snprintf(drv->firmware_name, sizeof(drv->firmware_name), "%s%d.ucode",
+		 cfg->fw_name_pre, drv->fw_index);
 
 	IWL_DEBUG_FW_INFO(drv, "attempting to load firmware '%s'\n",
 			  drv->firmware_name);