linux-kernel - Re: [PATCH v2] staging: qlge: emit debug and dump at same level

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Message-ID: <45de570ce9afcec576ed521ddad343e6ae46fd0f.camel@perches.com>
Date:   Sat, 22 Feb 2020 15:14:57 -0800
From:   Joe Perches <joe@...ches.com>
To:     Kaaira Gupta <kgupta@...iitr.ac.in>,
        Manish Chopra <manishc@...vell.com>,
        GR-Linux-NIC-Dev@...vell.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] staging: qlge: emit debug and dump at same level

On Sun, 2020-02-23 at 03:21 +0530, Kaaira Gupta wrote:
> Write a macro QLGE_DUMP_DBG having a function print_hex_dump so that
> the debug and dump are emitted at the same KERN_<LEVEL> and code becomes
> simpler. Write a macro instead of calling the function directly in
> ql_mpi_core_to_log() to go according to the coding practices followed in
> other drivers such as nvec and vc04_services.
> 
> Signed-off-by: Kaaira Gupta <kgupta@...iitr.ac.in>
> ---
> 
> changes since v1: make code of ql_mpi_core_to_log() simpler.
> 
> ----
> ---
>  drivers/staging/qlge/qlge_dbg.c | 25 +++++--------------------
>  1 file changed, 5 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/staging/qlge/qlge_dbg.c b/drivers/staging/qlge/qlge_dbg.c
[]
> @@ -1,5 +1,8 @@
>  // SPDX-License-Identifier: GPL-2.0
>  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> +#define QLGE_DUMP_DBG(str, buf, len)			    \
> +	print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_OFFSET, \
> +			32, 4, buf, len, false)

There is no need to create a used-once macro.
Just code the one use in-place.

>  #include <linux/slab.h>
>  
> @@ -1324,27 +1327,9 @@ void ql_mpi_core_to_log(struct work_struct *work)
>  {
>  	struct ql_adapter *qdev =
>  		container_of(work, struct ql_adapter, mpi_core_to_log.work);
> -	u32 *tmp, count;
> -	int i;
>  
> -	count = sizeof(struct ql_mpi_coredump) / sizeof(u32);
> -	tmp = (u32 *)qdev->mpi_coredump;
> -	netif_printk(qdev, drv, KERN_DEBUG, qdev->ndev,
> -		     "Core is dumping to log file!\n");
> -
> -	for (i = 0; i < count; i += 8) {
> -		pr_err("%.08x: %.08x %.08x %.08x %.08x %.08x "
> -			"%.08x %.08x %.08x\n", i,
> -			tmp[i + 0],
> -			tmp[i + 1],
> -			tmp[i + 2],
> -			tmp[i + 3],
> -			tmp[i + 4],
> -			tmp[i + 5],
> -			tmp[i + 6],
> -			tmp[i + 7]);
> -		msleep(5);
> -	}
> +	QLGE_DUMP_DBG("Core is dumping to log file!\n", qdev->mpi_coredump,
> +		      sizeof(*qdev->mpi_coredump));
>  }
>  
>  #ifdef QL_REG_DUMP