Messages in this thread Patch in this message | | | From | Huazhong Tan <> | Subject | [PATCH net-next 7/8] net: hns3: replace an unsuitable variable type in hclge_inform_reset_assert_to_vf() | Date | Sat, 4 Jan 2020 10:49:30 +0800 |
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In hclge_inform_reset_assert_to_vf(), variable reset_type(enum type) will be copied into msg_data whose size is 2 bytes. Currently, hip08 is a little-endian machine, so the lower two bytes of reset_type will be copied to msg_data. But when running on a big-endian machine, msg_data will have a wrong value(the higher two bytes of reset_type).
So this patch modifies the type of reset_type to u16, and adds a build check in case enum hnae3_reset_type has value larger than U16_MAX.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com> --- drivers/net/ethernet/hisilicon/hns3/hnae3.h | 1 + drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h index ed97bd6c..6b131ab 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h +++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h @@ -164,6 +164,7 @@ enum hnae3_reset_type { HNAE3_IMP_RESET, HNAE3_UNKNOWN_RESET, HNAE3_NONE_RESET, + HNAE3_MAX_RESET, }; enum hnae3_flr_state { diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c index f905dd3..a3c0822 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c @@ -86,10 +86,12 @@ static int hclge_send_mbx_msg(struct hclge_vport *vport, u8 *msg, u16 msg_len, int hclge_inform_reset_assert_to_vf(struct hclge_vport *vport) { struct hclge_dev *hdev = vport->back; - enum hnae3_reset_type reset_type; + u16 reset_type; u8 msg_data[2]; u8 dest_vfid; + BUILD_BUG_ON(HNAE3_MAX_RESET > U16_MAX); + dest_vfid = (u8)vport->vport_id; if (hdev->reset_type == HNAE3_FUNC_RESET) -- 2.7.4
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