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char: make some qemu_chr_fe skip if no driver

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In most cases, front ends do not care about the side effect of
CharBackend, so we can simply skip the checks and call the qemu_chr_fe
functions even without associated CharDriver.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-20-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-10-22 12:52:59 +03:00 • committed by Paolo Bonzini
parent c39860e6dc
commit fa394ed625
22 changed files with 156 additions and 190 deletions
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14
hw/char/xilinx_uartlite.c
View file

@ -143,11 +143,9 @@ uart_write(void *opaque, hwaddr addr,
break;
case R_TX:
if (s->chr.chr) {
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_fe_write_all(&s->chr, &ch, 1);
}
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_fe_write_all(&s->chr, &ch, 1);
s->regs[addr] = value;
/* hax. */
@ -213,10 +211,8 @@ static void xilinx_uartlite_realize(DeviceState *dev, Error **errp)
{
XilinxUARTLite *s = XILINX_UARTLITE(dev);
if (s->chr.chr) {
qemu_chr_fe_set_handlers(&s->chr, uart_can_rx, uart_rx,
uart_event, s, NULL);
}
qemu_chr_fe_set_handlers(&s->chr, uart_can_rx, uart_rx,
uart_event, s, NULL);
}
static void xilinx_uartlite_init(Object *obj)