linux-kernel - [PATCH 4.4 25/31] rtlwifi: rtl8821ae: fix firmware is not ready to run

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Message-Id: <20180720121341.060920827@linuxfoundation.org>
Date:   Fri, 20 Jul 2018 14:13:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ping-Ke Shih <pkshih@...ltek.com>,
        Larry Finger <Larry.Finger@...inger.net>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 4.4 25/31] rtlwifi: rtl8821ae: fix firmware is not ready to run

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ping-Ke Shih <pkshih@...ltek.com>

commit 9a98302de19991d51e067b88750585203b2a3ab6 upstream.

Without this patch, firmware will not run properly on rtl8821ae, and it
causes bad user experience. For example, bad connection performance with
low rate, higher power consumption, and so on.

rtl8821ae uses two kinds of firmwares for normal and WoWlan cases, and
each firmware has firmware data buffer and size individually. Original
code always overwrite size of normal firmware rtlpriv->rtlhal.fwsize, and
this mismatch causes firmware checksum error, then firmware can't start.

In this situation, driver gives message "Firmware is not ready to run!".

Fixes: fe89707f0afa ("rtlwifi: rtl8821ae: Simplify loading of WOWLAN firmware")
Signed-off-by: Ping-Ke Shih <pkshih@...ltek.com>
Cc: Stable <stable@...r.kernel.org> # 4.0+
Reviewed-by: Larry Finger <Larry.Finger@...inger.net>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/realtek/rtlwifi/core.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/net/wireless/realtek/rtlwifi/core.c
+++ b/drivers/net/wireless/realtek/rtlwifi/core.c
@@ -135,7 +135,6 @@ found_alt:
 		       firmware->size);
 		rtlpriv->rtlhal.wowlan_fwsize = firmware->size;
 	}
-	rtlpriv->rtlhal.fwsize = firmware->size;
 	release_firmware(firmware);
 }