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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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4
hw/char/escc.c
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@ -599,9 +599,7 @@ static uint64_t escc_mem_read(void *opaque, hwaddr addr,
else
ret = s->rx;
trace_escc_mem_readb_data(CHN_C(s), ret);
if (s->chr.chr) {
qemu_chr_fe_accept_input(&s->chr);
}
qemu_chr_fe_accept_input(&s->chr);
return ret;
default:
break;