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net: hns3: bugfix for handling mailbox while the command queue reinitialized

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[ Upstream commit 3c88ed1d79 ]

In a multi-core machine, the mailbox service and reset service
will be executed at the same time. The reset service will re-initialize
the command queue, before that, the mailbox handler can only get some
invalid messages.

The HCLGE_STATE_CMD_DISABLE flag means that the command queue is not
available and needs to be reinitialized. Therefore, when the mailbox
handler recognizes this flag, it should not process the command.

Fixes: dde1a86e93 ("net: hns3: Add mailbox support to PF driver")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Huazhong Tan
2018-10-30 21:50:51 +08:00
committed by Greg Kroah-Hartman
parent 92cb1b096a
commit 355ec07561
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
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@@ -458,6 +458,12 @@ void hclge_mbx_handler(struct hclge_dev *hdev)
/* handle all the mailbox requests in the queue */
while (!hclge_cmd_crq_empty(&hdev->hw)) {
if (test_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state)) {
dev_warn(&hdev->pdev->dev,
"command queue needs re-initializing\n");
return;
}
desc = &crq->desc[crq->next_to_use];
req = (struct hclge_mbx_vf_to_pf_cmd *)desc->data;