linux-kernel - Re: [PATCH v4 08/10] misc: rp1: RaspberryPi RP1 misc driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Z0nro2vMNxoU35GH@apocalypse>
Date: Fri, 29 Nov 2024 17:28:19 +0100
From: Andrea della Porta <andrea.porta@...e.com>
To: Stefan Wahren <wahrenst@....net>
Cc: Andrea della Porta <andrea.porta@...e.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczynski <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Bartosz Golaszewski <brgl@...ev.pl>,
	Derek Kiernan <derek.kiernan@....com>,
	Dragan Cvetic <dragan.cvetic@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Saravana Kannan <saravanak@...gle.com>, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-gpio@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	Herve Codina <herve.codina@...tlin.com>,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH v4 08/10] misc: rp1: RaspberryPi RP1 misc driver

Hi Stephan,

On 19:35 Mon 25 Nov     , Stefan Wahren wrote:
> Hi Andrea,
> 
> Am 24.11.24 um 11:51 schrieb Andrea della Porta:
> > The RaspberryPi RP1 is a PCI multi function device containing
> > peripherals ranging from Ethernet to USB controller, I2C, SPI
> > and others.
> >
 
...

> > +          Support the RP1 peripheral chip found on Raspberry Pi 5 board.
> > +	  controller, USB controller, I2C, SPI and UART.
> > +
> > +          The driver is responsible for enabling the DT node once the PCIe
> > +	  endpoint has been configured, and handling interrupts.
> > +
> > +          This driver uses an overlay to load other drivers to support for
> > +	  RP1 internal sub-devices.
> Please fix up the leading whitespace here

Ack.

> > diff --git a/drivers/misc/rp1/Makefile b/drivers/misc/rp1/Makefile
> > new file mode 100644
> > index 000000000000..508b4cb05627
> > --- /dev/null
> > +++ b/drivers/misc/rp1/Makefile
> > @@ -0,0 +1,3 @@
> > +# SPDX-License-Identifier: GPL-2.0-only

...

> > +#define RP1_INT_SYSCFG		58
> > +#define RP1_INT_CLOCKS_DEFAULT	59
> > +#define RP1_INT_VBUSCTRL	60
> > +#define RP1_INT_PROC_MISC	57
> > +#define RP1_INT_END		61
> > +
> > +struct rp1_dev {
> > +	struct pci_dev *pdev;
> > +	struct irq_domain *domain;
> > +	struct irq_data *pcie_irqds[64];
> > +	void __iomem *bar1;
> > +	int ovcs_id;
> /* overlay changeset id */

Ack.

> > +	bool level_triggered_irq[RP1_INT_END];
> > +};
> > +
> > +static void msix_cfg_set(struct rp1_dev *rp1, unsigned int hwirq, u32 value)
> > +{

...

> > +	struct device_node *rp1_node;
> > +	struct rp1_dev *rp1;
> > +	int err  = 0;
> Please remove the extra space after err

Ack.

> > +	int i;
> > +
> > +	rp1_node = dev_of_node(dev);
> > +	if (!rp1_node) {
> > +		dev_err(dev, "Missing of_node for device\n");
> > +		return -EINVAL;
> > +	}
> > +
> > +	rp1 = devm_kzalloc(&pdev->dev, sizeof(*rp1), GFP_KERNEL);
> > +	if (!rp1)
> > +		return -ENOMEM;
> > +
> > +	rp1->pdev = pdev;

...

> > +	err = pci_alloc_irq_vectors(pdev, RP1_INT_END, RP1_INT_END,
> > +				    PCI_IRQ_MSIX);
> > +	if (err < 0)
> > +		return dev_err_probe(&pdev->dev, err,
> > +				     "pci_alloc_irq_vectors failed");
> > +	else if (err != RP1_INT_END) {
> Please add braces for the if case

Ack.

Many thanks,
Andrea

> > +		dev_err(&pdev->dev, "Cannot allocate enough interrupts\n");
> > +		return -EINVAL;
> > +	}
> > +
> >