From 30482e796857e7d29877d93cc017aca5c844e4e1 Mon Sep 17 00:00:00 2001

From: Fam Zheng <famz@redhat.com>

Date: Thu, 18 May 2017 09:21:14 +0200

Subject: [PATCH 01/18] char/serial: cosmetic fixes.

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RH-Author: Fam Zheng <famz@redhat.com>

Message-id: <20170518092131.16571-2-famz@redhat.com>

Patchwork-id: 75293

O-Subject: [RHEL-7.4 qemu-kvm PATCH v3 01/18] char/serial: cosmetic fixes.

Bugzilla: 1451470

RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>

RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>

From: Peter Crosthwaite <peter.crosthwaite@xilinx.com>

Some cosmetic fixes to char/serial fixing some checkpatch errors.

Cc: qemu-trivial@nongnu.org

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>

Reviewed-by: Andreas Färber <afaerber@suse.de>

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

(cherry picked from commit 7f4f0a227fe0b24c35d0898f9ae7d5909fb51137)

Signed-off-by: Fam Zheng <famz@redhat.com>

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>

---

 hw/char/serial.c | 30 +++++++++++++++++++-----------

 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/hw/char/serial.c b/hw/char/serial.c

index 2383c31..7866b0f 100644

--- a/hw/char/serial.c

+++ b/hw/char/serial.c

@@ -264,8 +264,9 @@ static gboolean serial_xmit(GIOChannel *chan, GIOCondition cond, void *opaque)

     if (s->tsr_retry <= 0) {

         if (s->fcr & UART_FCR_FE) {

             s->tsr = fifo_get(s,XMIT_FIFO);

-            if (!s->xmit_fifo.count)

+            if (!s->xmit_fifo.count) {

                 s->lsr |= UART_LSR_THRE;

+            }

         } else if ((s->lsr & UART_LSR_THRE)) {

             return FALSE;

         } else {

@@ -462,10 +463,11 @@ static uint64_t serial_ioport_read(void *opaque, hwaddr addr, unsigned size)

         } else {

             if(s->fcr & UART_FCR_FE) {

                 ret = fifo_get(s,RECV_FIFO);

-                if (s->recv_fifo.count == 0)

+                if (s->recv_fifo.count == 0) {

                     s->lsr &= ~(UART_LSR_DR | UART_LSR_BI);

-                else

+                } else {

                     qemu_mod_timer(s->fifo_timeout_timer, qemu_get_clock_ns (vm_clock) + s->char_transmit_time * 4);

+                }

                 s->timeout_ipending = 0;

             } else {

                 ret = s->rbr;

@@ -535,15 +537,21 @@ static uint64_t serial_ioport_read(void *opaque, hwaddr addr, unsigned size)

 static int serial_can_receive(SerialState *s)

 {

     if(s->fcr & UART_FCR_FE) {

-        if(s->recv_fifo.count < UART_FIFO_LENGTH)

-        /* Advertise (fifo.itl - fifo.count) bytes when count < ITL, and 1 if above. If UART_FIFO_LENGTH - fifo.count is

-        advertised the effect will be to almost always fill the fifo completely before the guest has a chance to respond,

-        effectively overriding the ITL that the guest has set. */

-             return (s->recv_fifo.count <= s->recv_fifo.itl) ? s->recv_fifo.itl - s->recv_fifo.count : 1;

-        else

-             return 0;

+        if (s->recv_fifo.count < UART_FIFO_LENGTH) {

+            /*

+             * Advertise (fifo.itl - fifo.count) bytes when count < ITL, and 1

+             * if above. If UART_FIFO_LENGTH - fifo.count is advertised the

+             * effect will be to almost always fill the fifo completely before

+             * the guest has a chance to respond, effectively overriding the ITL

+             * that the guest has set.

+             */

+            return (s->recv_fifo.count <= s->recv_fifo.itl) ?

+                        s->recv_fifo.itl - s->recv_fifo.count : 1;

+        } else {

+            return 0;

+        }

     } else {

-    return !(s->lsr & UART_LSR_DR);

+        return !(s->lsr & UART_LSR_DR);

     }

 }

-- 

1.8.3.1