linux-kernel - Re: [PATCH 1/3] drivers/edac: Add L1 and L2 error detection for A72

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Message-ID: <a40e3c38-4ccc-45c8-921d-2d8ed8fe449b@linux.microsoft.com>
Date: Fri, 23 May 2025 11:26:48 -0700
From: Vijay Balakrishna <vijayb@...ux.microsoft.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, James Morse <james.morse@....com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Robert Richter
 <rric@...nel.org>, linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
 Tyler Hicks <code@...icks.com>, Marc Zyngier <maz@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] drivers/edac: Add L1 and L2 error detection for A72

On 5/20/25 02:35, Jonathan Cameron wrote:
> On Thu, 15 May 2025 17:06:11 -0700
> Vijay Balakrishna<vijayb@...ux.microsoft.com>  wrote:
> 
>> From: Sascha Hauer<s.hauer@...gutronix.de>
>>
>> The Cortex A72 cores have error detection capabilities for
>> the L1/L2 Caches, this patch adds a driver for them. The selected errors
>> to detect/report are by reading CPU/L2 memory error syndrome registers.
>>
>> Unfortunately there is no robust way to inject errors into the caches,
>> so this driver doesn't contain any code to actually test it. It has
>> been tested though with code taken from an older version [1] of this
>> driver.  For reasons stated in thread [1], the error injection code is
>> not suitable for mainline, so it is removed from the driver.
>>
>> [1]https://lore.kernel.org/all/1521073067-24348-1-git-send-email-york.sun@nxp.com/#t
>>
>> Signed-off-by: Sascha Hauer<s.hauer@...gutronix.de>
>> Co-developed-by: Vijay Balakrishna<vijayb@...ux.microsoft.com>
>> Signed-off-by: Vijay Balakrishna<vijayb@...ux.microsoft.com>
> Hi.
> 
> Some issues with release of device_nodes in the of parsing code.

Thank you, Jonathan for review. I'm addressing your comments and posting 
next series soon.

Vijay