Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec...

[~andy/linux] / drivers / tty / serial / mpsc.c

diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c
index fba52578d02f34495c977b183cf0e3b44185f7e9..8d702677acc5911c002134f85236090eeb793d10 100644 (file)
--- a/drivers/tty/serial/mpsc.c
+++ b/drivers/tty/serial/mpsc.c
@@ -934,7 +934,7 @@ static int serial_polled;
  ******************************************************************************
  */
 
-static int mpsc_rx_intr(struct mpsc_port_info *pi)
+static int mpsc_rx_intr(struct mpsc_port_info *pi, unsigned long *flags)
 {
        struct mpsc_rx_desc *rxre;
        struct tty_port *port = &pi->port.state->port;
@@ -969,8 +969,11 @@ static int mpsc_rx_intr(struct mpsc_port_info *pi)
 #endif
                /* Following use of tty struct directly is deprecated */
                if (tty_buffer_request_room(port, bytes_in) < bytes_in) {
-                       if (port->low_latency)
+                       if (port->low_latency) {
+                               spin_unlock_irqrestore(&pi->port.lock, *flags);
                                tty_flip_buffer_push(port);
+                               spin_lock_irqsave(&pi->port.lock, *flags);
+                       }
                        /*
                         * If this failed then we will throw away the bytes
                         * but must do so to clear interrupts.
@@ -1080,7 +1083,9 @@ next_frame:
        if ((readl(pi->sdma_base + SDMA_SDCM) & SDMA_SDCM_ERD) == 0)
                mpsc_start_rx(pi);
 
+       spin_unlock_irqrestore(&pi->port.lock, *flags);
        tty_flip_buffer_push(port);
+       spin_lock_irqsave(&pi->port.lock, *flags);
        return rc;
 }
 
@@ -1222,7 +1227,7 @@ static irqreturn_t mpsc_sdma_intr(int irq, void *dev_id)
 
        spin_lock_irqsave(&pi->port.lock, iflags);
        mpsc_sdma_intr_ack(pi);
-       if (mpsc_rx_intr(pi))
+       if (mpsc_rx_intr(pi, &iflags))
                rc = IRQ_HANDLED;
        if (mpsc_tx_intr(pi))
                rc = IRQ_HANDLED;