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net: hns3: handle empty unknown interrupt

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Since some MSI-X interrupt's status may be cleared by hardware,
so when the driver receives the interrupt, reading
HCLGE_VECTOR0_PF_OTHER_INT_STS_REG register will get an empty
unknown interrupt. For this case, the irq handler should enable
vector0 interrupt. This patch also use dev_info() instead of
dev_dbg() in the hclge_check_event_cause(), since this information
will be useful for normal usage.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2019-06-28 19:50:14 +08:00 committed by David S. Miller
parent bbe6540e7d
commit 9bc6ac918c
1 changed files with 10 additions and 5 deletions
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15
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
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@ -2783,8 +2783,9 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
/* check for vector0 msix event source */
if (msix_src_reg & HCLGE_VECTOR0_REG_MSIX_MASK) {
dev_dbg(&hdev->pdev->dev, "received event 0x%x\n",
msix_src_reg);
dev_info(&hdev->pdev->dev, "received event 0x%x\n",
msix_src_reg);
*clearval = msix_src_reg;
return HCLGE_VECTOR0_EVENT_ERR;
}
@ -2796,8 +2797,11 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
}
/* print other vector0 event source */
dev_dbg(&hdev->pdev->dev, "cmdq_src_reg:0x%x, msix_src_reg:0x%x\n",
cmdq_src_reg, msix_src_reg);
dev_info(&hdev->pdev->dev,
"CMDQ INT status:0x%x, other INT status:0x%x\n",
cmdq_src_reg, msix_src_reg);
*clearval = msix_src_reg;
return HCLGE_VECTOR0_EVENT_OTHER;
}
@ -2876,7 +2880,8 @@ static irqreturn_t hclge_misc_irq_handle(int irq, void *data)
}
/* clear the source of interrupt if it is not cause by reset */
if (event_cause == HCLGE_VECTOR0_EVENT_MBX) {
if (!clearval ||
event_cause == HCLGE_VECTOR0_EVENT_MBX) {
hclge_clear_event_cause(hdev, event_cause, clearval);
hclge_enable_vector(&hdev->misc_vector, true);
}