rtl8xxxu: Fix LDPC RX hang issue on 8192eu

Implement workaround for LDPC RX hands on 8192eu. This was inspired by
workaround found in the 8192eu vendor driver.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
index fdd11ec..ed266f0 100644 (file)
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
@@ -7234,6 +7234,16 @@ static int rtl8xxxu_init_device(struct ieee80211_hw *hw)
        /* ack for xmit mgmt frames. */
        rtl8xxxu_write32(priv, REG_FWHW_TXQ_CTRL, val32);
 
+       if (priv->rtl_chip == RTL8192E) {
+               /*
+                * Fix LDPC rx hang issue.
+                */
+               val32 = rtl8xxxu_read32(priv, REG_AFE_MISC);
+               rtl8xxxu_write8(priv, REG_8192E_LDOV12_CTRL, 0x75);
+               val32 &= 0xfff00fff;
+               val32 |= 0x0007e000;
+               rtl8xxxu_write32(priv, REG_8192E_LDOV12_CTRL, val32);
+       }
 exit:
        return ret;
 }