linux-kernel - Re: [PATCH] pmdomain: arm: Fix debugfs node creation failure

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Message-ID: <ZtgKYD87GF0fDucE@hovoldconsulting.com>
Date: Wed, 4 Sep 2024 09:21:04 +0200
From: Johan Hovold <johan@...nel.org>
To: Sibi Sankar <quic_sibis@...cinc.com>
Cc: ulf.hansson@...aro.org, sudeep.holla@....com, cristian.marussi@....com,
	linux-kernel@...r.kernel.org, arm-scmi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
	linux-pm@...r.kernel.org, quic_rgottimu@...cinc.com,
	quic_kshivnan@...cinc.com
Subject: Re: [PATCH] pmdomain: arm: Fix debugfs node creation failure

On Wed, Jul 03, 2024 at 04:37:41PM +0530, Sibi Sankar wrote:
> The domain attributes returned by the perf protocol can end up
> reporting identical names across domains, resulting in debugfs
> node creation failure. Fix this duplication by appending the
> domain-id to the domain name.
> 
> Logs:
> debugfs: Directory 'NCC' with parent 'pm_genpd' already present!
> debugfs: Directory 'NCC' with parent 'pm_genpd' already present!
> 
> Fixes: 2af23ceb8624 ("pmdomain: arm: Add the SCMI performance domain")

Please include:

Reported-by: Johan Hovold <johan+linaro@...nel.org>
Link: https://lore.kernel.org/lkml/ZoQjAWse2YxwyRJv@hovoldconsulting.com/

> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>

I now that this patch is being reworked, but please note that the
following warnings that I reported are seen also with this patch:

[    9.119117] arm-scmi firmware:scmi: Failed to add opps_by_lvl at 3417600 for NCC - ret:-16
[    9.129146] arm-scmi firmware:scmi: Failed to add opps_by_lvl at 3417600 for NCC - ret:-16
[    9.160328] arm-scmi firmware:scmi: Failed to add opps_by_lvl at 3417600 for NCC - ret:-16
[    9.175229] arm-scmi firmware:scmi: Failed to add opps_by_lvl at 3417600 for NCC - ret:-16

which seems to suggest that the approach taken by this patch is not
necessarily the right one.

Can you please also comment on why this is an issue on x1e80100 in the
commit message?

Johan