Make sure AUART is not busy before returning tx empty.
Signed-off-by: Hector Palacios <hector.palacios@xxxxxxxx>
---
drivers/tty/serial/mxs-auart.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index d9bf6e103f65..e5540c89dd48 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -776,10 +776,13 @@ static void mxs_auart_shutdown(struct uart_port *u)
static unsigned int mxs_auart_tx_empty(struct uart_port *u)
{
- if (readl(u->membase + AUART_STAT) & AUART_STAT_TXFE)
+ unsigned long stat;
+
+ stat = readl(u->membase + AUART_STAT);
+ if ((stat & (AUART_STAT_BUSY | AUART_STAT_TXFE)) == AUART_STAT_TXFE)
return TIOCSER_TEMT;
- else
- return 0;
+
+ return 0;
}
/*
--
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