提交 dacc0566 编写于 作者: A Alistair Francis 提交者: Peter Maydell

cadence_gem: Correct the multi-queue can rx logic

Correct the buffer descriptor busy logic to work correctly when using
multiple queues.
Signed-off-by: NAlistair Francis <alistair.francis@xilinx.com>
Message-id: 8a7e8059984e27d46a276a66299d035a0afd280f.1491947224.git.alistair.francis@xilinx.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
上级 75b77602
......@@ -481,14 +481,17 @@ static int gem_can_receive(NetClientState *nc)
}
for (i = 0; i < s->num_priority_queues; i++) {
if (rx_desc_get_ownership(s->rx_desc[i]) == 1) {
if (s->can_rx_state != 2) {
s->can_rx_state = 2;
DB_PRINT("can't receive - busy buffer descriptor (q%d) 0x%x\n",
i, s->rx_desc_addr[i]);
}
return 0;
if (rx_desc_get_ownership(s->rx_desc[i]) != 1) {
break;
}
};
if (i == s->num_priority_queues) {
if (s->can_rx_state != 2) {
s->can_rx_state = 2;
DB_PRINT("can't receive - all the buffer descriptors are busy\n");
}
return 0;
}
if (s->can_rx_state != 0) {
......
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