netdev - Re: [PATCH -next] hinic: Use ARRAY_SIZE for nic_vf_cmd_msg

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Message-ID: <01d45e599732bc5af33a09b36e63beabfcad8d25.camel@perches.com>
Date:   Tue, 28 Apr 2020 20:23:01 -0700
From:   Joe Perches <joe@...ches.com>
To:     Zou Wei <zou_wei@...wei.com>, aviad.krawczyk@...wei.com,
        davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] hinic: Use ARRAY_SIZE for nic_vf_cmd_msg_handler

On Wed, 2020-04-29 at 11:15 +0800, Zou Wei wrote:
> fix coccinelle warning, use ARRAY_SIZE
> 
> drivers/net/ethernet/huawei/hinic/hinic_sriov.c:713:43-44: WARNING: Use ARRAY_SIZE
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zou Wei <zou_wei@...wei.com>
> ---
>  drivers/net/ethernet/huawei/hinic/hinic_sriov.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/huawei/hinic/hinic_sriov.c b/drivers/net/ethernet/huawei/hinic/hinic_sriov.c
> index b24788e..ac12725 100644
> --- a/drivers/net/ethernet/huawei/hinic/hinic_sriov.c
> +++ b/drivers/net/ethernet/huawei/hinic/hinic_sriov.c
> @@ -710,8 +710,7 @@ int nic_pf_mbox_handler(void *hwdev, u16 vf_id, u8 cmd, void *buf_in,
>  	if (!hwdev)
>  		return -EFAULT;
>  
> -	cmd_number = sizeof(nic_vf_cmd_msg_handler) /
> -			    sizeof(struct vf_cmd_msg_handle);
> +	cmd_number = ARRAY_SIZE(nic_vf_cmd_msg_handler);
>  	pfhwdev = container_of(dev, struct hinic_pfhwdev, hwdev);
>  	nic_io = &dev->func_to_io;
>  	for (i = 0; i < cmd_number; i++) {

Probably better to remove cmd_number altogether
---
 drivers/net/ethernet/huawei/hinic/hinic_sriov.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_sriov.c b/drivers/net/ethernet/huawei/hinic/hinic_sriov.c
index b24788..af70cc 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_sriov.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_sriov.c
@@ -704,17 +704,15 @@ int nic_pf_mbox_handler(void *hwdev, u16 vf_id, u8 cmd, void *buf_in,
 	struct hinic_hwdev *dev = hwdev;
 	struct hinic_func_to_io *nic_io;
 	struct hinic_pfhwdev *pfhwdev;
-	u32 i, cmd_number;
+	u32 i;
 	int err = 0;
 
 	if (!hwdev)
 		return -EFAULT;
 
-	cmd_number = sizeof(nic_vf_cmd_msg_handler) /
-			    sizeof(struct vf_cmd_msg_handle);
 	pfhwdev = container_of(dev, struct hinic_pfhwdev, hwdev);
 	nic_io = &dev->func_to_io;
-	for (i = 0; i < cmd_number; i++) {
+	for (i = 0; i < ARRAY_SIZE(nic_vf_cmd_msg_handler); i++) {
 		vf_msg_handle = &nic_vf_cmd_msg_handler[i];
 		if (cmd == vf_msg_handle->cmd &&
 		    vf_msg_handle->cmd_msg_handler) {
@@ -725,7 +723,7 @@ int nic_pf_mbox_handler(void *hwdev, u16 vf_id, u8 cmd, void *buf_in,
 			break;
 		}
 	}
-	if (i == cmd_number)
+	if (i == ARRAY_SIZE(nic_vf_cmd_msg_handler))
 		err = hinic_msg_to_mgmt(&pfhwdev->pf_to_mgmt, HINIC_MOD_L2NIC,
 					cmd, buf_in, in_size, buf_out,
 					out_size, HINIC_MGMT_MSG_SYNC);