r8152: fix the RX FIFO settings when suspending

[ Upstream commit b75d612 ]

The RX FIFO would be changed when suspending, so the related settings
have to be modified, too. Otherwise, the flow control would work
abnormally.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216333
Reported-by: Mark Blakeney <[email protected]>
Fixes: cdf0b86 ("r8152: fix a WOL issue")
Signed-off-by: Hayes Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: hayesorz

drivers/net/usb/r8152.c

@@ -5904,6 +5904,11 @@ static void r8153_enter_oob(struct r8152 *tp)
 	ocp_data &= ~NOW_IS_OOB;
 	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
 
+	/* RX FIFO settings for OOB */
+	ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL0, RXFIFO_THR1_OOB);
+	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL1, RXFIFO_THR2_OOB);
+	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL2, RXFIFO_THR3_OOB);
+
 	rtl_disable(tp);
 	rtl_reset_bmu(tp);
 
@@ -6542,6 +6547,11 @@ static void rtl8156_down(struct r8152 *tp)
 	ocp_data &= ~NOW_IS_OOB;
 	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
 
+	/* RX FIFO settings for OOB */
+	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RXFIFO_FULL, 64 / 16);
+	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RX_FIFO_FULL, 1024 / 16);
+	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RX_FIFO_EMPTY, 4096 / 16);
+
 	rtl_disable(tp);
 	rtl_reset_bmu(tp);