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| author | Alistair Francis <alistair.francis@xilinx.com> | 2017-04-20 17:32:29 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2017-04-20 17:39:17 +0100 |
| commit | dacc0566acda512ebaf18ad051b387a56a3f7253 (patch) | |
| tree | a6d24dba013b9528fe895c34a834de174fb7dcc9 /hw | |
| parent | 75b7760212b2cfa86977704a2c19a0d8daced5be (diff) | |
| download | qemu-dacc0566acda512ebaf18ad051b387a56a3f7253.zip qemu-dacc0566acda512ebaf18ad051b387a56a3f7253.tar.gz qemu-dacc0566acda512ebaf18ad051b387a56a3f7253.tar.bz2 | |
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: 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>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/net/cadence_gem.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c index 17c229d..a66a9cc 100644 --- a/hw/net/cadence_gem.c +++ b/hw/net/cadence_gem.c @@ -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) { |