From: Carlos Sanchez 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 Signed-off-by: Carlos Sanchez Cc: Russell King Signed-off-by: Andrew Morton --- drivers/serial/mpsc.c | 2 ++ 1 files changed, 2 insertions(+) diff -puN drivers/serial/mpsc.c~added-a-receive_abort-to-the-marvell-serial-driver drivers/serial/mpsc.c --- devel/drivers/serial/mpsc.c~added-a-receive_abort-to-the-marvell-serial-driver 2005-10-14 01:02:54.000000000 -0700 +++ devel-akpm/drivers/serial/mpsc.c 2005-10-14 01:02:54.000000000 -0700 @@ -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); _