linux-kernel - Re: [PATCH net v3] net: stmmac: xgmac: fix handling of DPP safety error for DMA channels

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Date: Thu, 1 Feb 2024 14:44:09 +0100
From: Simon Horman <horms@...nel.org>
To: Furong Xu <0x1207@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Joao Pinto <jpinto@...opsys.com>,
	Serge Semin <fancer.lancer@...il.com>, netdev@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	xfr@...look.com, rock.xu@....com
Subject: Re: [PATCH net v3] net: stmmac: xgmac: fix handling of DPP safety
 error for DMA channels

On Wed, Jan 31, 2024 at 10:08:28AM +0800, Furong Xu wrote:
> Commit 56e58d6c8a56 ("net: stmmac: Implement Safety Features in
> XGMAC core") checks and reports safety errors, but leaves the
> Data Path Parity Errors for each channel in DMA unhandled at all, lead to
> a storm of interrupt.
> Fix it by checking and clearing the DMA_DPP_Interrupt_Status register.
> 
> Fixes: 56e58d6c8a56 ("net: stmmac: Implement Safety Features in XGMAC core")
> Signed-off-by: Furong Xu <0x1207@...il.com>
> ---
> Changes in v3:
>  - code style fix, thanks Paolo Abeni
> 
> Changes in v2:
>   - explicit enable Data Path Parity Protection
>   - add new counters to stmmac_safety_stats
>   - add detailed log

Thanks for the updates.

Reviewed-by: Simon Horman <horms@...nel.org>