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chardev: block during sync read 

A sync read should block until all requested data is
available (instead of retrying in qemu_chr_fe_read_all). Change the
channel to blocking during sync_read.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170706170353.32601-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2017-07-06 19:03:53 +02:00 committed by Paolo Bonzini
parent 747969db2a
commit bcdeb9be56
1 changed files with 2 additions and 0 deletions
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2
chardev/char-socket.c
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@ -454,7 +454,9 @@ static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len)
return 0;
}
qio_channel_set_blocking(s->ioc, true, NULL);
size = tcp_chr_recv(chr, (void *) buf, len);
qio_channel_set_blocking(s->ioc, false, NULL);
if (size == 0) {
/* connection closed */
tcp_chr_disconnect(chr);