irqchip/sifive-plic: Use devm_xyz() for managed allocation

Use devm_xyz() for allocations and mappings managed by the
Linux device driver framework.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240222094006.1030709-4-apatel@ventanamicro.com

Author: avpatel

drivers/irqchip/irq-sifive-plic.c

@@ -436,39 +436,30 @@ static int plic_probe(struct platform_device *pdev)
 			plic_quirks = (unsigned long)id->data;
 	}
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
 	priv->dev = dev;
 	priv->plic_quirks = plic_quirks;
 
-	priv->regs = of_iomap(to_of_node(dev->fwnode), 0);
-	if (WARN_ON(!priv->regs)) {
-		error = -EIO;
-		goto out_free_priv;
-	}
+	priv->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (WARN_ON(!priv->regs))
+		return -EIO;
 
-	error = -EINVAL;
 	of_property_read_u32(to_of_node(dev->fwnode), "riscv,ndev", &nr_irqs);
 	if (WARN_ON(!nr_irqs))
-		goto out_iounmap;
+		return -EINVAL;
 
 	priv->nr_irqs = nr_irqs;
 
-	priv->prio_save = bitmap_alloc(nr_irqs, GFP_KERNEL);
+	priv->prio_save = devm_bitmap_zalloc(dev, nr_irqs, GFP_KERNEL);
 	if (!priv->prio_save)
-		goto out_free_priority_reg;
+		return -ENOMEM;
 
 	nr_contexts = of_irq_count(to_of_node(dev->fwnode));
 	if (WARN_ON(!nr_contexts))
-		goto out_free_priority_reg;
-
-	error = -ENOMEM;
-	priv->irqdomain = irq_domain_add_linear(to_of_node(dev->fwnode), nr_irqs + 1,
-						&plic_irqdomain_ops, priv);
-	if (WARN_ON(!priv->irqdomain))
-		goto out_free_priority_reg;
+		return -EINVAL;
 
 	for (i = 0; i < nr_contexts; i++) {
 		struct of_phandle_args parent;
@@ -539,10 +530,10 @@ static int plic_probe(struct platform_device *pdev)
 			i * CONTEXT_ENABLE_SIZE;
 		handler->priv = priv;
 
-		handler->enable_save =  kcalloc(DIV_ROUND_UP(nr_irqs, 32),
-						sizeof(*handler->enable_save), GFP_KERNEL);
+		handler->enable_save = devm_kcalloc(dev, DIV_ROUND_UP(nr_irqs, 32),
+						    sizeof(*handler->enable_save), GFP_KERNEL);
 		if (!handler->enable_save)
-			goto out_free_enable_reg;
+			return -ENOMEM;
 done:
 		for (hwirq = 1; hwirq <= nr_irqs; hwirq++) {
 			plic_toggle(handler, hwirq, 0);
@@ -552,6 +543,11 @@ static int plic_probe(struct platform_device *pdev)
 		nr_handlers++;
 	}
 
+	priv->irqdomain = irq_domain_add_linear(to_of_node(dev->fwnode), nr_irqs + 1,
+						&plic_irqdomain_ops, priv);
+	if (WARN_ON(!priv->irqdomain))
+		return -ENOMEM;
+
 	/*
 	 * We can have multiple PLIC instances so setup cpuhp state
 	 * and register syscore operations only once after context
@@ -578,19 +574,6 @@ static int plic_probe(struct platform_device *pdev)
 	dev_info(dev, "mapped %d interrupts with %d handlers for %d contexts.\n",
 		 nr_irqs, nr_handlers, nr_contexts);
 	return 0;
-
-out_free_enable_reg:
-	for_each_cpu(cpu, cpu_present_mask) {
-		handler = per_cpu_ptr(&plic_handlers, cpu);
-		kfree(handler->enable_save);
-	}
-out_free_priority_reg:
-	kfree(priv->prio_save);
-out_iounmap:
-	iounmap(priv->regs);
-out_free_priv:
-	kfree(priv);
-	return error;
 }
 
 static struct platform_driver plic_driver = {