net: hns3: fix interrupt clearing error for VF

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Currently, VF driver has two kinds of interrupts, reset & CMDQ RX.
For revision 0x21, according to the UM, each interrupt should be
cleared by write 0 to the corresponding bit, but the implementation
writes 0 to the whole register in fact, it will clear other
interrupt at the same time, then the VF will loss the interrupt.
But for revision 0x20, this interrupt clear register is a read &
write register, for compatible, we just keep the old implementation
for 0x20.

This patch fixes it, also, adds a new register for reading the interrupt
status according to hardware user manual.

Fixes: e2cb1dec97 ("net: hns3: Add HNS3 VF HCL(Hardware Compatibility Layer) Support")
Fixes: b90fcc5bd9 ("net: hns3: add reset handling for VF when doing Core/Global/IMP reset")

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Huazhong Tan 2019-08-09 10:31:08 +08:00 • committed by David S. Miller

parent 9e6717af61

commit 130509213b

2 changed files with 21 additions and 9 deletions

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28

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c

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2

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h

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