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Message-ID: <CAMZ6RqLmgLMpkfrv1cM=8HhScTGoL6noozwGx36hYQmb1EKPQw@mail.gmail.com>
Date: Wed, 23 Nov 2022 18:13:41 +0900
From: Vincent MAILHOL <mailhol.vincent@...adoo.fr>
To: Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc: Wolfgang Grandegger <wg@...ndegger.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, linux-can@...r.kernel.org,
netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] can: etas_es58x: repair conditional for a verbose debug message
Hi Lukas,
Thank you for reporting this bug.
On Wed. 23 Nov. 2022 at 16:45, Lukas Bulwahn <lukas.bulwahn@...il.com> wrote:
> The definition of VERBOSE_DEBUG for detailled debugging is set simply by
^^^^^^^^^
detailed
> adding "#define VERBOSE_DEBUG" in the source code. It is not a kernel
> configuration that is prefixed by CONFIG.
ACK.
I initially used #ifdef VERBOSE_DEBUG but then inadvertently replaced
it by IS_ENABLED(CONFIG_VERBOSE_DEBUG) instead of
defined(VERBOSE_DEBUG).
> As the netdev_vdbg() macro is already defined conditional on
> defined(VERBOSE_DEBUG), there is really no need to duplicate the check
> before calling netdev_vdbg().
NACK.
There is a need. net_ratelimit() will continue to emit those messages:
net_ratelimit: xxxx callbacks suppressed
The goal of this check is to guard net_ratelimit(), not to guard netdev_vdbg().
> Repair the conditional for a verbose debug message.
>
If you want to send a v2, please also add the fix tag:
Fixes: commit 8537257874e9 ("can: etas_es58x: add core support for
ETAS ES58X CAN USB interfaces")
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
> ---
> drivers/net/can/usb/etas_es58x/es58x_core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c
> index 25f863b4f5f0..2708909fb851 100644
> --- a/drivers/net/can/usb/etas_es58x/es58x_core.c
> +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
> @@ -989,7 +989,7 @@ int es58x_rx_cmd_ret_u32(struct net_device *netdev,
> break;
>
> case ES58X_RET_TYPE_TX_MSG:
> - if (IS_ENABLED(CONFIG_VERBOSE_DEBUG) && net_ratelimit())
> + if (net_ratelimit())
> netdev_vdbg(netdev, "%s: OK\n", ret_desc);
> break;
>
> --
> 2.17.1
>
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