From: Carlos Sanchez <csanchez@windy.az.mvista.com>
Date: Sun, 30 Oct 2005 23:02:53 +0000 (-0800)
Subject: [PATCH] Added a Receive_Abort to the Marvell serial driver
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f7232056bff5fe2d3bfeab35252a66ebaeb5bbde;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] Added a Receive_Abort to the Marvell serial driver

Added a Receive_Abort to the Marvell serial driver

Fix occasional input overrun errors on Marvell serial driver

- If the Marvell serial driver is repeatedly started and then stopped it
  will occasionally report an input overrun error when started.

- Added a Receive_Abort to the Marvell serial driver to abort previously
  received receive errors when re-starting the receive

Acked-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Carlos Sanchez <csanchez@mvista.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index efe79b1fd431..aec83f577ce6 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -1100,6 +1100,8 @@ mpsc_start_rx(struct mpsc_port_info *pi)
 {
 	pr_debug("mpsc_start_rx[%d]: Starting...\n", pi->port.line);
 
+	/* Issue a Receive Abort to clear any receive errors */
+	writel(MPSC_CHR_2_RA, pi->mpsc_base + MPSC_CHR_2);
 	if (pi->rcv_data) {
 		mpsc_enter_hunt(pi);
 		mpsc_sdma_cmd(pi, SDMA_SDCM_ERD);