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Message-ID: <20250226065650.GC951736@rocinante>
Date: Wed, 26 Feb 2025 15:56:50 +0900
From: Krzysztof Wilczyński <kw@...ux.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: jingoohan1@...il.com, lpieralisi@...nel.org, robh@...nel.org,
bhelgaas@...gle.com, linux-pci@...r.kernel.org,
linux-kernel@...r.kernel.org, shradha.t@...sung.com,
cassel@...nel.org
Subject: Re: [PATCH 2/2] PCI: dwc-debugfs: Return -EOPNOTSUPP if an event
counter is not supported
Hello,
> If the platform doesn't support an event counter, enabling it using the
> 'counter_enable' debugfs attribute currently will succeed. But reading the
> debugfs attribute back will return 'Counter Disabled'.
>
> This could cause confusion to the users. So while enabling an event
> counter in counter_enable_write(), always read back the status to check if
> the counter is enabled or not. If not, return -EOPNOTSUPP to let the users
> know that the event counter is not supported.
Thank you for following up on this. Appreciated. With that...
Reviewed-by: Krzysztof Wilczyński <kwilczynski@...nel.org>
Thank you!
Krzysztof
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