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terminal3270: do not use backend timer sources 

terminal3270 uses the front-end side of the chardev. It shouldn't
create sources from backend side context (with backend
functions).

send_timing_mark_cb calls qemu_chr_fe_write_all() which should be
thread safe.

This partially reverts changes from commit
2c716ba150.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20190206174328.9736-4-marcandre.lureau@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2019-02-06 18:43:25 +01:00
parent 3d9e232240
commit b1f1103dba
1 changed files with 6 additions and 9 deletions
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15
hw/char/terminal3270.c
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@ -31,7 +31,7 @@ typedef struct Terminal3270 {
uint8_t outv[OUTPUT_BUFFER_SIZE];
int in_len;
bool handshake_done;
GSource *timer_src;
guint timer_tag;
} Terminal3270;
#define TYPE_TERMINAL_3270 "x-terminal3270"
@ -47,10 +47,9 @@ static int terminal_can_read(void *opaque)
static void terminal_timer_cancel(Terminal3270 *t)
{
if (t->timer_src) {
g_source_destroy(t->timer_src);
g_source_unref(t->timer_src);
t->timer_src = NULL;
if (t->timer_tag) {
g_source_remove(t->timer_tag);
t->timer_tag = 0;
}
}
@ -100,8 +99,7 @@ static void terminal_read(void *opaque, const uint8_t *buf, int size)
assert(size <= (INPUT_BUFFER_SIZE - t->in_len));
terminal_timer_cancel(t);
t->timer_src = qemu_chr_timeout_add_ms(t->chr.chr, 600 * 1000,
send_timing_mark_cb, t);
t->timer_tag = g_timeout_add_seconds(600, send_timing_mark_cb, t);
memcpy(&t->inv[t->in_len], buf, size);
t->in_len += size;
if (t->in_len < 2) {
@ -160,8 +158,7 @@ static void chr_event(void *opaque, int event)
* char-socket.c. Once qemu receives the terminal-type of the
* client, mark handshake done and trigger everything rolling again.
*/
t->timer_src = qemu_chr_timeout_add_ms(t->chr.chr, 600 * 1000,
send_timing_mark_cb, t);
t->timer_tag = g_timeout_add_seconds(600, send_timing_mark_cb, t);
break;
case CHR_EVENT_CLOSED:
sch->curr_status.scsw.dstat = SCSW_DSTAT_DEVICE_END;