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cadence_gem: Correct the multi-queue can rx logic

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Correct the buffer descriptor busy logic to work correctly when using
multiple queues.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 8a7e8059984e27d46a276a66299d035a0afd280f.1491947224.git.alistair.francis@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alistair Francis 2017-04-20 17:32:29 +01:00 committed by Peter Maydell
parent 75b7760212
commit dacc0566ac
1 changed files with 10 additions and 7 deletions
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17
hw/net/cadence_gem.c
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@ -481,14 +481,17 @@ static int gem_can_receive(NetClientState *nc)
} }
for (i = 0; i < s->num_priority_queues; i++) { for (i = 0; i < s->num_priority_queues; i++) {
if (rx_desc_get_ownership(s->rx_desc[i]) == 1) { if (rx_desc_get_ownership(s->rx_desc[i]) != 1) {
if (s->can_rx_state != 2) { break;
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 (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) { if (s->can_rx_state != 0) {