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authorFelipe Balbi <balbi@ti.com>2012-09-06 14:45:25 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-09-06 18:17:01 +0200
commitbf63a0862c964f9015d0d8e3c2ccca7005eebea2 (patch)
tree356ebd94bc1d288ce84bf04f5d34889511efd711 /drivers
parentserial: omap: refactor receive_chars() into rdi/rlsi handlers (diff)
downloadlinux-bf63a0862c964f9015d0d8e3c2ccca7005eebea2.tar.xz
linux-bf63a0862c964f9015d0d8e3c2ccca7005eebea2.zip
serial: omap: move THRE check to transmit_chars()
since all other IRQ types now do all necessary checks inside their handlers, transmit_chars() was the only one left expecting serial_omap_irq() to check THRE for it. We can move THRE check to transmit_chars() in order to make serial_omap_irq() more uniform. Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/serial/omap-serial.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 9c0a4ae97e65..d3fbb70a8e8a 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -196,11 +196,14 @@ static void serial_omap_stop_rx(struct uart_port *port)
pm_runtime_put_autosuspend(up->dev);
}
-static void transmit_chars(struct uart_omap_port *up)
+static void transmit_chars(struct uart_omap_port *up, unsigned int lsr)
{
struct circ_buf *xmit = &up->port.state->xmit;
int count;
+ if (!(lsr & UART_LSR_THRE))
+ return;
+
if (up->port.x_char) {
serial_out(up, UART_TX, up->port.x_char);
up->port.icount.tx++;
@@ -370,8 +373,7 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id)
check_modem_status(up);
break;
case UART_IIR_THRI:
- if (lsr & UART_LSR_THRE)
- transmit_chars(up);
+ transmit_chars(up, lsr);
break;
case UART_IIR_RX_TIMEOUT:
/* FALLTHROUGH */