Larry Finger c713fb071e rtlwifi: rtl8821ae: Fix connection lost problem correctly ... There has been a coding error in rtl8821ae since it was first introduced, namely that an 8-bit register was read using a 16-bit read in _rtl8821ae_dbi_read(). This error was fixed with commit 40b368af4b ("rtlwifi: Fix alignment issues"); however, this change led to instability in the connection. To restore stability, this change was reverted in commit b8b8b16352 ("rtlwifi: rtl8821ae: Fix connection lost problem"). Unfortunately, the unaligned access causes machine checks in ARM architecture, and we were finally forced to find the actual cause of the problem on x86 platforms. Following a suggestion from Pkshih <pkshih@realtek.com>, it was found that increasing the ASPM L1 latency from 0 to 7 fixed the instability. This parameter was varied to see if a smaller value would work; however, it appears that 7 is the safest value. A new symbol is defined for this quantity, thus it can be easily changed if necessary. Fixes: b8b8b16352 ("rtlwifi: rtl8821ae: Fix connection lost problem") Cc: Stable <stable@vger.kernel.org> # 4.14+ Fix-suggested-by: Pkshih <pkshih@realtek.com> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Tested-by: James Cameron <quozl@laptop.org> # x86_64 OLPC NL3 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>		2018-02-07 15:38:37 +02:00
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rtl8xxxu	rtl8xxxu: Fix trailing semicolon	2018-01-24 17:45:17 +02:00
rtl818x	rtlwifi: rtl818x: remove redundant check for cck_power > 15	2017-12-07 15:16:07 +02:00
rtlwifi	rtlwifi: rtl8821ae: Fix connection lost problem correctly	2018-02-07 15:38:37 +02:00
Kconfig	realtek: create separate Kconfig file	2015-11-18 14:28:31 +02:00
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