linux-kernel - Re: [PATCH v18 2/9] usb: dwc3: core: Access XHCI address space temporarily to read port info

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Date: Wed, 3 Apr 2024 09:06:04 +0200
From: Johan Hovold <johan@...nel.org>
To: Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>
Cc: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Wesley Cheng <quic_wcheng@...cinc.com>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Conor Dooley <conor+dt@...nel.org>, Felipe Balbi <balbi@...nel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"quic_ppratap@...cinc.com" <quic_ppratap@...cinc.com>,
	"quic_jackp@...cinc.com" <quic_jackp@...cinc.com>,
	Johan Hovold <johan+linaro@...nel.org>
Subject: Re: [PATCH v18 2/9] usb: dwc3: core: Access XHCI address space
 temporarily to read port info

On Wed, Apr 03, 2024 at 10:54:25AM +0530, Krishna Kurapati PSSNV wrote:
 
> >> +static int dwc3_read_port_info(struct dwc3 *dwc)
> >> +{
> >> +	void __iomem *base;
> >> +	u8 major_revision;
> >> +	u32 offset;
> >> +	u32 val;
> >> +
> >> +	/*
> >> +	 * Remap xHCI address space to access XHCI ext cap regs since it is
> >> +	 * needed to get information on number of ports present.
> >> +	 */
> >> +	base = ioremap(dwc->xhci_resources[0].start,
> >> +		       resource_size(&dwc->xhci_resources[0]));
> >> +	if (IS_ERR(base))
> >> +		return PTR_ERR(base);
> > 
> > Looks like you forgot to address some of the comments you said you'd
> > update previously if you submit a new version to the series.
> > 
> > [*] https://lore.kernel.org/linux-usb/af73110d-e13e-4183-af11-aed869ac0a31@quicinc.com/
> > 
> 
> Apologies. I agree. I was too much focused on acpi removal and interrupt 
> cleanup, I forgot the last comment you gave.
> 
> Can I send in a separate patch for this ?

The series has not been merged yet so you can address both issues in a
v19. Perhaps wait a day or two in case Thinh has further comments.

Johan