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net: hns3: Fix for hclge_reset running repeatly problem 

When hardware sends the HCLGE_VECTOR0_EVENT_RST event through
hclge_misc_irq_handle, currently driver enables misc_vector in
the interrupt handle, and hardware generates the same interrupt
for the same reset event again and again until the reset is
complete, which causes hclge_reset running repeatly problem.

This patch fixes by enabling the misc_vector after reset is
complete.

Fixes: 4ed340ab8f ("net: hns3: Add reset process in hclge_main")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yunsheng Lin 2018-06-01 17:52:06 +01:00 committed by David S. Miller
parent f5be79673f
commit cd8c5c269b
1 changed files with 34 additions and 6 deletions
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40
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
View File

@ -2587,9 +2587,11 @@ static irqreturn_t hclge_misc_irq_handle(int irq, void *data)
break;
}
/* we should clear the source of interrupt */
hclge_clear_event_cause(hdev, event_cause, clearval);
hclge_enable_vector(&hdev->misc_vector, true);
/* clear the source of interrupt if it is not cause by reset */
if (event_cause != HCLGE_VECTOR0_EVENT_RST) {
hclge_clear_event_cause(hdev, event_cause, clearval);
hclge_enable_vector(&hdev->misc_vector, true);
}
return IRQ_HANDLED;
}
@ -2777,6 +2779,33 @@ static enum hnae3_reset_type hclge_get_reset_level(struct hclge_dev *hdev,
return rst_level;
}
static void hclge_clear_reset_cause(struct hclge_dev *hdev)
{
u32 clearval = 0;
switch (hdev->reset_type) {
case HNAE3_IMP_RESET:
clearval = BIT(HCLGE_VECTOR0_IMPRESET_INT_B);
break;
case HNAE3_GLOBAL_RESET:
clearval = BIT(HCLGE_VECTOR0_GLOBALRESET_INT_B);
break;
case HNAE3_CORE_RESET:
clearval = BIT(HCLGE_VECTOR0_CORERESET_INT_B);
break;
default:
dev_warn(&hdev->pdev->dev, "Unsupported reset event to clear:%d",
hdev->reset_type);
break;
}
if (!clearval)
return;
hclge_write_dev(&hdev->hw, HCLGE_MISC_RESET_STS_REG, clearval);
hclge_enable_vector(&hdev->misc_vector, true);
}
static void hclge_reset(struct hclge_dev *hdev)
{
/* perform reset of the stack & ae device for a client */
@ -2789,6 +2818,8 @@ static void hclge_reset(struct hclge_dev *hdev)
hclge_reset_ae_dev(hdev->ae_dev);
hclge_notify_client(hdev, HNAE3_INIT_CLIENT);
rtnl_unlock();
hclge_clear_reset_cause(hdev);
} else {
/* schedule again to check pending resets later */
set_bit(hdev->reset_type, &hdev->reset_pending);
@ -5661,9 +5692,6 @@ static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev)
return ret;
}
/* Enable MISC vector(vector0) */
hclge_enable_vector(&hdev->misc_vector, true);
dev_info(&pdev->dev, "Reset done, %s driver initialization finished.\n",
HCLGE_DRIVER_NAME);