Re: [PATCH v11 12/14] irqchip/riscv-aplic: Add support for MSI-mode

[Sunil V L <sunilvl@ventanamicro.com>]

Hi Anup,

On Mon, Oct 23, 2023 at 10:57:58PM +0530, Anup Patel wrote:
> The RISC-V advanced platform-level interrupt controller (APLIC) has
> two modes of operation: 1) Direct mode and 2) MSI mode.
> (For more details, refer https://github.com/riscv/riscv-aia)
> 
> In APLIC MSI-mode, wired interrupts are forwared as message signaled
> interrupts (MSIs) to CPUs via IMSIC.
> 
> We extend the existing APLIC irqchip driver to support MSI-mode for
> RISC-V platforms having both wired interrupts and MSIs.
> 
> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
> ---
[...]
> +int aplic_msi_setup(struct device *dev, void __iomem *regs)
> +{
> +	const struct imsic_global_config *imsic_global;
> +	struct irq_domain *irqdomain;
> +	struct aplic_priv *priv;
> +	struct aplic_msicfg *mc;
> +	phys_addr_t pa;
> +	int rc;
> +
> +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	rc = aplic_setup_priv(priv, dev, regs);
> +	if (!priv) {
This should check rc instead of priv.

> +		dev_err(dev, "failed to create APLIC context\n");
> +		return rc;
> +	}
> +	mc = &priv->msicfg;
> +
> +	/*
> +	 * The APLIC outgoing MSI config registers assume target MSI
> +	 * controller to be RISC-V AIA IMSIC controller.
> +	 */
> +	imsic_global = imsic_get_global_config();
> +	if (!imsic_global) {
> +		dev_err(dev, "IMSIC global config not found\n");
> +		return -ENODEV;
For all error return paths, priv should be freed.

Thanks,
Sunil