1 files changed, 49 insertions, 13 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 5912cdec33a7..b3c263d2724f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1570,24 +1570,40 @@ static void iwl_nic_start(struct iwl_priv *priv)
 static int iwl_read_ucode(struct iwl_priv *priv)
 {
         struct iwl_ucode *ucode;
-        int ret;
+        int ret = -EINVAL, index;
         const struct firmware *ucode_raw;
-        const char *name = priv->cfg->fw_name;
+        const char *name_pre = priv->cfg->fw_name_pre;
+        const unsigned int api_max = priv->cfg->ucode_api_max;
+        const unsigned int api_min = priv->cfg->ucode_api_min;
+        char buf[25];
         u8 *src;
         size_t len;
-        u32 inst_size, data_size, init_size, init_data_size, boot_size;
+        u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
 
         /* Ask kernel firmware_class module to get the boot firmware off disk.
          * request_firmware() is synchronous, file is in memory on return. */
-        ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
-        if (ret < 0) {
-                IWL_ERROR("%s firmware file req failed: Reason %d\n",
-                                        name, ret);
-                goto error;
+        for (index = api_max; index >= api_min; index--) {
+                sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
+                ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
+                if (ret < 0) {
+                        IWL_ERROR("%s firmware file req failed: Reason %d\n",
+                                  buf, ret);
+                        if (ret == -ENOENT)
+                                continue;
+                        else
+                                goto error;
+                } else {
+                        if (index < api_max)
+                                IWL_ERROR("Loaded firmware %s, which is deprecated. Please use API v%u instead.\n",
+                                          buf, api_max);
+                        IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
+                                       buf, ucode_raw->size);
+                        break;
+                }
         }
 
-        IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
-                       name, ucode_raw->size);
+        if (ret < 0)
+                goto error;
 
         /* Make sure that we got at least our header! */
         if (ucode_raw->size < sizeof(*ucode)) {
@@ -1600,19 +1616,39 @@ static int iwl_read_ucode(struct iwl_priv *priv)
         ucode = (void *)ucode_raw->data;
 
         priv->ucode_ver = le32_to_cpu(ucode->ver);
+        api_ver = IWL_UCODE_API(priv->ucode_ver);
         inst_size = le32_to_cpu(ucode->inst_size);
         data_size = le32_to_cpu(ucode->data_size);
         init_size = le32_to_cpu(ucode->init_size);
         init_data_size = le32_to_cpu(ucode->init_data_size);
         boot_size = le32_to_cpu(ucode->boot_size);
 
-        IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
-                       priv->ucode_ver);
-        IWL_DEBUG_INFO("f/w package hdr ucode version = %u.%u.%u.%u\n",
+        /* api_ver should match the api version forming part of the
+         * firmware filename ... but we don't check for that and only rely
+         * on the API version read from firware header from here on forward */
+
+        if (api_ver < api_min || api_ver > api_max) {
+                IWL_ERROR("Driver unable to support your firmware API. "
+                          "Driver supports v%u, firmware is v%u.\n",
+                          api_max, api_ver);
+                priv->ucode_ver = 0;
+                ret = -EINVAL;
+                goto err_release;
+        }
+        if (api_ver != api_max)
+                IWL_ERROR("Firmware has old API version. Expected v%u, "
+                          "got v%u. New firmware can be obtained "
+                          "from http://www.intellinuxwireless.org.\n",
+                          api_max, api_ver);
+
+        printk(KERN_INFO DRV_NAME " loaded firmware version %u.%u.%u.%u\n",
                        IWL_UCODE_MAJOR(priv->ucode_ver),
                        IWL_UCODE_MINOR(priv->ucode_ver),
                        IWL_UCODE_API(priv->ucode_ver),
                        IWL_UCODE_SERIAL(priv->ucode_ver));
+
+        IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
+                       priv->ucode_ver);
         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
                        inst_size);
         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",