Re: [PATCH 6/6] drm/amdkfd: Improve KFD IOCTL printing

["Zhao, Yong" <Yong.Zhao-5C7GfCeVMHo@public.gmane.org>]

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Okay, I will change dev_err back to dev_dbg. The hex printing is still very useful.

Yong
________________________________
From: Kuehling, Felix <Felix.Kuehling-5C7GfCeVMHo@public.gmane.org>
Sent: Monday, September 30, 2019 11:47 AM
To: Zhao, Yong <Yong.Zhao-5C7GfCeVMHo@public.gmane.org>; amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org <amd-gfx@lists.freedesktop.org>
Subject: Re: [PATCH 6/6] drm/amdkfd: Improve KFD IOCTL printing

On 2019-09-27 11:41 p.m., Zhao, Yong wrote:
> The code use hex define, so should the printing. Also, printf a message
> if there is a failure.
>
> Change-Id: Ia7cc7690553bb043915b3d8c0157216c64421a60
> Signed-off-by: Yong Zhao <Yong.Zhao-5C7GfCeVMHo@public.gmane.org>
> ---
>   drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> index c28ba0c1d7ac..d1ab09c0f522 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> @@ -1840,7 +1840,7 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
>        } else
>                goto err_i1;
>
> -     dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
> +     dev_dbg(kfd_device, "ioctl cmd 0x%x (#0x%x), arg 0x%lx\n", cmd, nr, arg);
>
>        process = kfd_get_process(current);
>        if (IS_ERR(process)) {
> @@ -1895,7 +1895,8 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
>                kfree(kdata);
>
>        if (retcode)
> -             dev_dbg(kfd_device, "ret = %d\n", retcode);
> +             dev_err(kfd_device, "ioctl cmd (#0x%x), arg 0x%lx, ret = %d\n",
> +                             nr, arg, retcode);

NAK. We don't want to spam the kernel log with cryptic error messages
every time ioctl functions fail. Please leave this as a dev_dbg message.
Failing ioctl functions could be perfectly normal for a number of
reasons (system call interrupted by signal, running out of event slots,
timeouts on event waiting, etc). But every bug report will incorrectly
blame any unrelated problem on those messages if they happen to appear
in the kernel log.

Regards,
   Felix


>
>        return retcode;
>   }

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