If qemu_chr_fe_write() returns an error (represented by a negative
number) we should skip incrementing the count and initiating a
memmove().
Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Message-id:
667e5dc534d33338fcfc2471e5aa32fe7cbd13dc.
1466546703.git.alistair.francis@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
}
ret = qemu_chr_fe_write(s->chr, s->tx_fifo, s->tx_count);
- s->tx_count -= ret;
- memmove(s->tx_fifo, s->tx_fifo + ret, s->tx_count);
+
+ if (ret >= 0) {
+ s->tx_count -= ret;
+ memmove(s->tx_fifo, s->tx_fifo + ret, s->tx_count);
+ }
if (s->tx_count) {
int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT|G_IO_HUP,