[PATCH] NFC: nci: Remove redundant assignment to len

[PATCH] NFC: nci: Remove redundant assignment to len

[Yang Li]

Variable 'len' is set to conn_info->max_pkt_payload_len but this
value is never read as it is overwritten with a new value later on,
hence it is a redundant assignment and can be removed.

Clean up the following clang-analyzer warning:

net/nfc/nci/hci.c:164:3: warning: Value stored to 'len' is never read
[clang-analyzer-deadcode.DeadStores]

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
---
 net/nfc/nci/hci.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
index 9686514..d6732e5 100644
--- a/net/nfc/nci/hci.c
+++ b/net/nfc/nci/hci.c
@@ -161,8 +161,6 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
 	*(u8 *)skb_push(skb, 1) = data_type;
 
 	do {
-		len = conn_info->max_pkt_payload_len;
-
 		/* If last packet add NCI_HFP_NO_CHAINING */
 		if (i + conn_info->max_pkt_payload_len -
 		    (skb->len + 1) >= data_len) {
-- 
1.8.3.1

Re: [PATCH] NFC: nci: Remove redundant assignment to len

[Krzysztof Kozlowski]

On 01/06/2021 11:49, Yang Li wrote:
> Variable 'len' is set to conn_info->max_pkt_payload_len but this
> value is never read as it is overwritten with a new value later on,
> hence it is a redundant assignment and can be removed.
> 
> Clean up the following clang-analyzer warning:
> 
> net/nfc/nci/hci.c:164:3: warning: Value stored to 'len' is never read
> [clang-analyzer-deadcode.DeadStores]
> 
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
> ---
>  net/nfc/nci/hci.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
> index 9686514..d6732e5 100644
> --- a/net/nfc/nci/hci.c
> +++ b/net/nfc/nci/hci.c
> @@ -161,8 +161,6 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
>  	*(u8 *)skb_push(skb, 1) = data_type;
>  
>  	do {
> -		len = conn_info->max_pkt_payload_len;
> -
>  		/* If last packet add NCI_HFP_NO_CHAINING */
>  		if (i + conn_info->max_pkt_payload_len -
>  		    (skb->len + 1) >= data_len) {
> 

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

Best regards,
Krzysztof

[linux-nfc] Re: [PATCH] NFC: nci: Remove redundant assignment to len

[Krzysztof Kozlowski]

On 01/06/2021 11:49, Yang Li wrote:
> Variable 'len' is set to conn_info->max_pkt_payload_len but this
> value is never read as it is overwritten with a new value later on,
> hence it is a redundant assignment and can be removed.
> 
> Clean up the following clang-analyzer warning:
> 
> net/nfc/nci/hci.c:164:3: warning: Value stored to 'len' is never read
> [clang-analyzer-deadcode.DeadStores]
> 
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
> ---
>  net/nfc/nci/hci.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
> index 9686514..d6732e5 100644
> --- a/net/nfc/nci/hci.c
> +++ b/net/nfc/nci/hci.c
> @@ -161,8 +161,6 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
>  	*(u8 *)skb_push(skb, 1) = data_type;
>  
>  	do {
> -		len = conn_info->max_pkt_payload_len;
> -
>  		/* If last packet add NCI_HFP_NO_CHAINING */
>  		if (i + conn_info->max_pkt_payload_len -
>  		    (skb->len + 1) >= data_len) {
> 

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

Best regards,
Krzysztof
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Re: [PATCH] NFC: nci: Remove redundant assignment to len

[Krzysztof Kozlowski]

[-- Attachment #1: Type: text/plain, Size: 1163 bytes --]

On 01/06/2021 11:49, Yang Li wrote:
> Variable 'len' is set to conn_info->max_pkt_payload_len but this
> value is never read as it is overwritten with a new value later on,
> hence it is a redundant assignment and can be removed.
> 
> Clean up the following clang-analyzer warning:
> 
> net/nfc/nci/hci.c:164:3: warning: Value stored to 'len' is never read
> [clang-analyzer-deadcode.DeadStores]
> 
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
> ---
>  net/nfc/nci/hci.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
> index 9686514..d6732e5 100644
> --- a/net/nfc/nci/hci.c
> +++ b/net/nfc/nci/hci.c
> @@ -161,8 +161,6 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
>  	*(u8 *)skb_push(skb, 1) = data_type;
>  
>  	do {
> -		len = conn_info->max_pkt_payload_len;
> -
>  		/* If last packet add NCI_HFP_NO_CHAINING */
>  		if (i + conn_info->max_pkt_payload_len -
>  		    (skb->len + 1) >= data_len) {
> 

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

Best regards,
Krzysztof

Re: [PATCH] NFC: nci: Remove redundant assignment to len

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Tue,  1 Jun 2021 17:49:50 +0800 you wrote:
> Variable 'len' is set to conn_info->max_pkt_payload_len but this
> value is never read as it is overwritten with a new value later on,
> hence it is a redundant assignment and can be removed.
> 
> Clean up the following clang-analyzer warning:
> 
> net/nfc/nci/hci.c:164:3: warning: Value stored to 'len' is never read
> [clang-analyzer-deadcode.DeadStores]
> 
> [...]

Here is the summary with links:
  - NFC: nci: Remove redundant assignment to len
    https://git.kernel.org/netdev/net-next/c/7cf85f8caa04

You are awesome, thank you!
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