linux-kernel - Re: [PATCH 3/3] drm/etnaviv: Print an error message if inserting IOVA range fails

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Message-ID: <fb5ae5769442f4c84098acd674d423cd3f00bc66.camel@pengutronix.de>
Date: Mon, 07 Oct 2024 12:20:18 +0200
From: Lucas Stach <l.stach@...gutronix.de>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>, Russell King
 <linux+etnaviv@...linux.org.uk>, Christian Gmeiner
 <christian.gmeiner@...il.com>
Cc: David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] drm/etnaviv: Print an error message if inserting
 IOVA range fails

Am Samstag, dem 05.10.2024 um 03:42 +0800 schrieb Sui Jingfeng:
> Print an error message to help debug when such an issue happen, since it's
> not so obvious.
> 
> Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>

Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

> ---
> v0 -> v1: Use dev_err_ratelimited() to prevent spamming the logs
> 
> v0 is at https://lore.kernel.org/dri-devel/20240930221706.399139-1-sui.jingfeng@linux.dev/
> ---
>  drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
> index a52ec5eb0e3d..37866ed05c13 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
> @@ -300,8 +300,12 @@ int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
>  		ret = etnaviv_iommu_insert_exact(context, node, user_size, va);
>  	else
>  		ret = etnaviv_iommu_find_iova(context, node, user_size);
> -	if (ret < 0)
> +	if (ret < 0) {
> +		dev_err_ratelimited(context->global->dev,
> +				    "Insert iova failed: 0x%llx(0x%x)\n",
> +				    va, user_size);
>  		goto unlock;
> +	}
>  
>  	mapping->iova = node->start;
>  	ret = etnaviv_iommu_map(context, node->start, user_size, sgt,