yeahuh / rpms / qemu-kvm

Forked from rpms/qemu-kvm 2 years ago
Clone

Blame SOURCES/kvm-serial-separate-serial_xmit-and-serial_watch_cb.patch

619821
From 8497b21c6dabe117b27d76f3bdbd86d80b0dd1d7 Mon Sep 17 00:00:00 2001
b28c64
From: Fam Zheng <famz@redhat.com>
619821
Date: Thu, 18 May 2017 09:21:30 +0200
b28c64
Subject: [PATCH 17/18] serial: separate serial_xmit and serial_watch_cb
b28c64
b28c64
RH-Author: Fam Zheng <famz@redhat.com>
619821
Message-id: <20170518092131.16571-18-famz@redhat.com>
619821
Patchwork-id: 75309
619821
O-Subject: [RHEL-7.4 qemu-kvm PATCH v3 17/18] serial: separate serial_xmit and serial_watch_cb
619821
Bugzilla: 1451470
b28c64
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
619821
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
b28c64
RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
b28c64
b28c64
From: Paolo Bonzini <pbonzini@redhat.com>
b28c64
b28c64
serial_xmit starts transmission of whatever is in the transmitter
b28c64
register, THR or FIFO; serial_watch_cb is a wrapper around it and is
b28c64
only used as a qemu_chr_fe_add_watch callback.
b28c64
b28c64
Tested-by: Bret Ketchum <bcketchum@gmail.com>
b28c64
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
b28c64
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
b28c64
(cherry picked from commit b0585e7e07982daa578c3bfef7f6843c89f110a8)
b28c64
Signed-off-by: Fam Zheng <famz@redhat.com>
b28c64
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
b28c64
b28c64
Conflicts:
b28c64
	hw/char/serial.c
b28c64
b28c64
Contextual conflict because the surrounding migration code around the
b28c64
touched functions is different.
b28c64
---
b28c64
 hw/char/serial.c | 18 +++++++++++-------
b28c64
 1 file changed, 11 insertions(+), 7 deletions(-)
b28c64
b28c64
diff --git a/hw/char/serial.c b/hw/char/serial.c
b28c64
index fdda802..69fefb2 100644
b28c64
--- a/hw/char/serial.c
b28c64
+++ b/hw/char/serial.c
b28c64
@@ -104,6 +104,7 @@ do {} while (0)
b28c64
 #endif
b28c64
 
b28c64
 static void serial_receive1(void *opaque, const uint8_t *buf, int size);
b28c64
+static void serial_xmit(SerialState *s);
b28c64
 
b28c64
 static inline void recv_fifo_put(SerialState *s, uint8_t chr)
b28c64
 {
b28c64
@@ -219,10 +220,16 @@ static void serial_update_msl(SerialState *s)
b28c64
         qemu_mod_timer(s->modem_status_poll, qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 100);
b28c64
 }
b28c64
 
b28c64
-static gboolean serial_xmit(GIOChannel *chan, GIOCondition cond, void *opaque)
b28c64
+static gboolean serial_watch_cb(GIOChannel *chan, GIOCondition cond,
b28c64
+                                void *opaque)
b28c64
 {
b28c64
     SerialState *s = opaque;
b28c64
+    serial_xmit(s);
b28c64
+    return FALSE;
b28c64
+}
b28c64
 
b28c64
+static void serial_xmit(SerialState *s)
b28c64
+{
b28c64
     do {
b28c64
         assert(!(s->lsr & UART_LSR_TEMT));
b28c64
         if (s->tsr_retry == 0) {
b28c64
@@ -250,9 +257,9 @@ static gboolean serial_xmit(GIOChannel *chan, GIOCondition cond, void *opaque)
b28c64
         } else if (qemu_chr_fe_write(s->chr, &s->tsr, 1) != 1) {
b28c64
             if (s->tsr_retry < MAX_XMIT_RETRY &&
b28c64
                 qemu_chr_fe_add_watch(s->chr, G_IO_OUT|G_IO_HUP,
b28c64
-                                      serial_xmit, s) > 0) {
b28c64
+                                      serial_watch_cb, s) > 0) {
b28c64
                 s->tsr_retry++;
b28c64
-                return FALSE;
b28c64
+                return;
b28c64
             }
b28c64
         }
b28c64
         s->tsr_retry = 0;
b28c64
@@ -263,11 +270,8 @@ static gboolean serial_xmit(GIOChannel *chan, GIOCondition cond, void *opaque)
b28c64
 
b28c64
     s->last_xmit_ts = qemu_get_clock_ns(vm_clock);
b28c64
     s->lsr |= UART_LSR_TEMT;
b28c64
-
b28c64
-    return FALSE;
b28c64
 }
b28c64
 
b28c64
-
b28c64
 static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val,
b28c64
                                 unsigned size)
b28c64
 {
b28c64
@@ -295,7 +299,7 @@ static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val,
b28c64
             s->lsr &= ~UART_LSR_TEMT;
b28c64
             serial_update_irq(s);
b28c64
             if (s->tsr_retry == 0) {
b28c64
-                serial_xmit(NULL, G_IO_OUT, s);
b28c64
+                serial_xmit(s);
b28c64
             }
b28c64
         }
b28c64
         break;
b28c64
-- 
b28c64
1.8.3.1
b28c64