From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Thu, 7 Apr 2016 18:19:29 +0000 (-0400)
Subject: rtl8xxxu: Fix LDPC RX hang issue on 8192eu
X-Git-Tag: v4.7-rc1~154^2~146^2~106
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=e1394fe5f98638ac0231063245614bb20e94e57f;p=linux.git

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 fdd11ece3806..ed266f081fd0 100644
--- 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;
 }