This patch checks if the s->tx_fifo is full. Fixes: 58ac482a66de ("introduce xlnx-dp") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1424 Reported-by: Qiang Liu <cyruscy...@gmail.com> Signed-off-by: Qiang Liu <cyruscy...@gmail.com> --- hw/display/xlnx_dp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/hw/display/xlnx_dp.c b/hw/display/xlnx_dp.c index 972473d94f..617b394af2 100644 --- a/hw/display/xlnx_dp.c +++ b/hw/display/xlnx_dp.c @@ -854,7 +854,11 @@ static void xlnx_dp_write(void *opaque, hwaddr offset, uint64_t value, break; case DP_AUX_WRITE_FIFO: { uint8_t c = value; - xlnx_dp_aux_push_tx_fifo(s, &c, 1); + if (fifo8_is_full(&s->tx_fifo)) { + qemu_log_mask(LOG_GUEST_ERROR, "xlnx_dp: TX fifo is full"); + } else { + xlnx_dp_aux_push_tx_fifo(s, &c, 1); + } break; } case DP_AUX_CLOCK_DIVIDER: -- 2.25.1