linux-kernel - Re: [PATCH 2/2] staging: rtl8723bs: Initialize local variables at declaration

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Message-ID: <2025040507-attest-hyphen-5dae@gregkh>
Date: Sat, 5 Apr 2025 08:37:18 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Erick Karanja <karanja99erick@...il.com>
Cc: outreachy@...ts.linux.dev, philipp.g.hortmann@...il.com,
	linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] staging: rtl8723bs: Initialize local variables at
 declaration

On Sat, Apr 05, 2025 at 06:14:49AM +0300, Erick Karanja wrote:
> Optimize variable initialization by integrating the initialization
> directly into the variable declaration in cases where the initialization
> is simple and doesn't depend on other variables or complex expressions.
> This makes the code more concise and readable.
> 
> Signed-off-by: Erick Karanja <karanja99erick@...il.com>
> ---
>  .../staging/rtl8723bs/hal/rtl8723bs_xmit.c    | 56 ++++++-------------
>  1 file changed, 16 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c b/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c
> index 5dc1c12fe03e..ebe9562a9606 100644
> --- a/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c
> +++ b/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c
> @@ -120,13 +120,10 @@ static s32 rtl8723_dequeue_writeport(struct adapter *padapter)
>   */
>  s32 rtl8723bs_xmit_buf_handler(struct adapter *padapter)
>  {
> -	struct xmit_priv *pxmitpriv;
> +	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
>  	u8 queue_empty, queue_pending;
>  	s32 ret;
>  
> -
> -	pxmitpriv = &padapter->xmitpriv;
> -
>  	if (wait_for_completion_interruptible(&pxmitpriv->xmit_comp)) {
>  		netdev_emerg(padapter->pnetdev,
>  			     "%s: down SdioXmitBufSema fail!\n", __func__);
> @@ -168,10 +165,10 @@ s32 rtl8723bs_xmit_buf_handler(struct adapter *padapter)
>   */
>  static s32 xmit_xmitframes(struct adapter *padapter, struct xmit_priv *pxmitpriv)
>  {
> -	s32 err, ret;
> +	s32 err = 0, ret;
>  	u32 k = 0;
> -	struct hw_xmit *hwxmits, *phwxmit;
> -	u8 idx, hwentry;
> +	struct hw_xmit *hwxmits = pxmitpriv->hwxmits, *phwxmit;
> +	u8 idx, hwentry = pxmitpriv->hwxmit_entry;

These lines are NOT more understandable and readable at all, sorry.  You
are mixing pre-initialized variables with not-initialized ones, making
this harder to read and maintain over time.

Which would you want to come back to in 5 years to try to understand
what is going on?

Keep it simple please.

thanks,

greg k-h