linux-kernel - Re: [PATCH] staging: rtl8723bs: Align address to 4-byte boundary

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Message-ID: <20240615180501.KINZFINu@linutronix.de>
Date: Sat, 15 Jun 2024 20:05:01 +0200
From: Nam Cao <namcao@...utronix.de>
To: Abhinav Jain <jain.abhinav177@...il.com>
Cc: gregkh@...uxfoundation.org, linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org, skhan@...uxfoundation.org,
	javier.carrasco.cruz@...il.com
Subject: Re: [PATCH] staging: rtl8723bs: Align address to 4-byte boundary

On Fri, Jun 14, 2024 at 10:42:56PM +0000, Abhinav Jain wrote:
> Add address alignment in sdio_local_read, _sdio_local_read &
> sdio_local_write functions as per the TODO.
> 
> Signed-off-by: Abhinav Jain <jain.abhinav177@...il.com>
> ---
>  drivers/staging/rtl8723bs/hal/sdio_ops.c | 12 +++---------
>  1 file changed, 3 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/staging/rtl8723bs/hal/sdio_ops.c b/drivers/staging/rtl8723bs/hal/sdio_ops.c
> index 107f427ee4aa..caee2d2043b3 100644
> --- a/drivers/staging/rtl8723bs/hal/sdio_ops.c
> +++ b/drivers/staging/rtl8723bs/hal/sdio_ops.c
> @@ -478,9 +478,6 @@ void sdio_set_intf_ops(struct adapter *adapter, struct _io_ops *ops)
>  	ops->_write_port = &sdio_write_port;
>  }
>  
> -/*
> - * Todo: align address to 4 bytes.
> - */
>  static s32 _sdio_local_read(
>  	struct adapter *adapter,
>  	u32 addr,
> @@ -494,6 +491,7 @@ static s32 _sdio_local_read(
>  	u8 *tmpbuf;
>  	u32 n;
>  
> +	addr = addr & ~3;
>  	intfhdl = &adapter->iopriv.intf;
>  
>  	hal_sdio_get_cmd_addr_8723b(adapter, SDIO_LOCAL_DEVICE_ID, addr, &addr);
> @@ -516,9 +514,6 @@ static s32 _sdio_local_read(
>  	return err;
>  }
>  
> -/*
> - * Todo: align address to 4 bytes.
> - */
>  s32 sdio_local_read(
>  	struct adapter *adapter,
>  	u32 addr,
> @@ -532,6 +527,7 @@ s32 sdio_local_read(
>  	u8 *tmpbuf;
>  	u32 n;
>  
> +	addr = addr & ~3;
>  	intfhdl = &adapter->iopriv.intf;
>  
>  	hal_sdio_get_cmd_addr_8723b(adapter, SDIO_LOCAL_DEVICE_ID, addr, &addr);
> @@ -557,9 +553,6 @@ s32 sdio_local_read(
>  	return err;
>  }
>  
> -/*
> - * Todo: align address to 4 bytes.
> - */
>  s32 sdio_local_write(
>  	struct adapter *adapter,
>  	u32 addr,
> @@ -572,6 +565,7 @@ s32 sdio_local_write(
>  	s32 err;
>  	u8 *tmpbuf;
>  
> +	addr = addr & ~3;
>  	intfhdl = &adapter->iopriv.intf;
>  
>  	hal_sdio_get_cmd_addr_8723b(adapter, SDIO_LOCAL_DEVICE_ID, addr, &addr);

Tthese functions are never called with "addr" that is not 4-byte-aligned.
So I don't think this patch is what the Todo notes meant.

Best regards,
Nam