rtlwifi: rtl8192ce: Fix loading of incorrect firmware

In commit cf4747d7535a ("rtlwifi: Fix regression caused by commit
d86e64768859, an error in the edit results in the wrong firmware
being loaded for some models of the RTL8188/8192CE. In this condition,
the connection suffered from high ping latency, slow transfer rates,
 and required higher signal strengths to work at all

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=853073,
https://bugzilla.opensuse.org/show_bug.cgi?id=1017471, and
https://github.com/lwfinger/rtlwifi_new/issues/203 for descriptions
of the problems. This patch fixes all of those problems.

Fixes: cf4747d7535a ("rtlwifi: Fix regression caused by commit d86e64768859")
Signed-off-by: Jurij Smakov <jurij@wooyd.org>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org> # 4.9+
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192ce/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192ce/sw.c
index 691ddef1ae28..a33a06d58a9a 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192ce/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192ce/sw.c
@@ -92,7 +92,7 @@ int rtl92c_init_sw_vars(struct ieee80211_hw *hw)
         struct rtl_priv *rtlpriv = rtl_priv(hw);
         struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
-        char *fw_name = "rtlwifi/rtl8192cfwU.bin";
+        char *fw_name;
 
         rtl8192ce_bt_reg_init(hw);
 
@@ -164,8 +164,13 @@ int rtl92c_init_sw_vars(struct ieee80211_hw *hw)
         }
 
         /* request fw */
-        if (IS_81XXC_VENDOR_UMC_B_CUT(rtlhal->version))
+        if (IS_VENDOR_UMC_A_CUT(rtlhal->version) &&
+            !IS_92C_SERIAL(rtlhal->version))
+                fw_name = "rtlwifi/rtl8192cfwU.bin";
+        else if (IS_81XXC_VENDOR_UMC_B_CUT(rtlhal->version))
                 fw_name = "rtlwifi/rtl8192cfwU_B.bin";
+        else
+                fw_name = "rtlwifi/rtl8192cfw.bin";
 
         rtlpriv->max_fw_size = 0x4000;
         pr_info("Using firmware %s\n", fw_name);