linux-kernel - Re: [PATCH v2 2/3] net: stmmac: Add interconnect support

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Date: Thu, 27 Jun 2024 02:12:53 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Sagar Cheluvegowda <quic_scheluve@...cinc.com>
Cc: Vinod Koul <vkoul@...nel.org>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Russell King <linux@...linux.org.uk>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Bhupesh Sharma <bhupesh.sharma@...aro.org>, kernel@...cinc.com,
	Andrew Halaney <ahalaney@...hat.com>, linux-arm-msm@...r.kernel.org,
	netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v2 2/3] net: stmmac: Add interconnect support

On Wed, Jun 26, 2024 at 04:36:06PM -0700, Sagar Cheluvegowda wrote:
> 
> 
> On 6/26/2024 6:07 AM, Andrew Lunn wrote:
> >> +	plat->axi_icc_path = devm_of_icc_get(&pdev->dev, "axi");
> >> +	if (IS_ERR(plat->axi_icc_path)) {
> >> +		ret = (void *)plat->axi_icc_path;
> > 
> > Casting	to a void * seems odd. ERR_PTR()?
> > 
> > 	Andrew
> 
> The output of devm_of_icc_get is a pointer of type icc_path,
> i am getting below warning when i try to ERR_PTR instead of Void*
> as ERR_PTR will try to convert a long integer to a Void*.
> 
> "warning: passing argument 1 of ‘ERR_PTR’ makes integer from pointer without a cast"
> 

https://elixir.bootlin.com/linux/v6.10-rc5/source/drivers/crypto/qce/core.c#L224
https://elixir.bootlin.com/linux/v6.10-rc5/source/drivers/gpu/drm/msm/adreno/a3xx_gpu.c#L591
https://elixir.bootlin.com/linux/v6.10-rc5/source/drivers/gpu/drm/msm/adreno/a3xx_gpu.c#L597
https://elixir.bootlin.com/linux/v6.10-rc5/source/drivers/spi/spi-qup.c#L1052

Sorry, PTR_ERR().

In general, a cast to a void * is a red flag and will get looked
at. It is generally wrong. So you might want to fixup where ever you
copied this from.

	Andrew