rtl8192cu: Fix missing firmware load

In commit 3ac5e26a1e935469a8bdae1d624bc3b59d1fcdc5 entitled
"rtlwifi: rtl8192c-common: Change common firmware routines for addition
of rtl8192se and rtl8192de", the firmware loading code was moved.
Unfortunately, some necessary code was dropped for rtl8192cu.

The dmesg output shows the following:

rtl8192c: Loading firmware file rtlwifi/rtl8192cufw.bin
rtl8192c_common:_rtl92c_fw_free_to_go():<0-0> Polling FW ready fail!! REG_MCUFWDL:0x00000006 .
rtl8192c_common:rtl92c_download_fw():<0-0> Firmware is not ready to run!

In addition, the interface will authenticate and associate, but cannot
transfer data.

This is reported as Kernel Bug #38012.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index bee7c1480f63..092e342c19df 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -53,6 +53,8 @@ MODULE_FIRMWARE("rtlwifi/rtl8192cufw.bin");
 static int rtl92cu_init_sw_vars(struct ieee80211_hw *hw)
 {
         struct rtl_priv *rtlpriv = rtl_priv(hw);
+        const struct firmware *firmware;
+        int err;
 
         rtlpriv->dm.dm_initialgain_enable = 1;
         rtlpriv->dm.dm_flag = 0;
@@ -64,6 +66,24 @@ static int rtl92cu_init_sw_vars(struct ieee80211_hw *hw)
                          ("Can't alloc buffer for fw.\n"));
                 return 1;
         }
+        /* request fw */
+        err = request_firmware(&firmware, rtlpriv->cfg->fw_name,
+                        rtlpriv->io.dev);
+        if (err) {
+                RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+                         ("Failed to request firmware!\n"));
+                return 1;
+        }
+        if (firmware->size > 0x4000) {
+                RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+                         ("Firmware is too big!\n"));
+                release_firmware(firmware);
+                return 1;
+        }
+        memcpy(rtlpriv->rtlhal.pfirmware, firmware->data, firmware->size);
+        rtlpriv->rtlhal.fwsize = firmware->size;
+        release_firmware(firmware);
+
         return 0;
 }