Commit 6e5f4436 authored Jan 20, 2015 by Troy Tan Committed by Kalle Valo Feb 03, 2015

rtlwifi: rtl8192ee: Fix TX hang due to failure to update TX write point



Initially, the routine to update the write point in the FIFO buffer was
coded to save CPU time by not doing the calculation every interrupt. This
was an error and results in TX hangs.

Signed-off-by: Troy Tan <troy_tan@realsil.com.cn>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org> [V3.18]
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

parent b661a5da

drivers/net/wireless/rtlwifi/rtl8192ee/trx.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -1027,8 +1027,7 @@ bool rtl92ee_is_tx_desc_closed(struct ieee80211_hw *hw, u8 hw_queue, u16 index)
		static u8 stop_report_cnt;
		struct rtl8192_tx_ring *ring = &rtlpci->tx_ring[hw_queue];

		/checking Read/Write Point each interrupt wastes CPU /
		if (stop_report_cnt > 15 \|\| !rtlpriv->link_info.busytraffic) {
		{
		u16 point_diff = 0;
		u16 cur_tx_rp, cur_tx_wp;
		u32 tmpu32 = 0;