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powerpc/powernv: Separate function for OPAL IRQ setup
The patch put the OPAL interrupt setup logic in opal_init() into seperate function opal_irq_init() for easier code maintaining. The patch doesn't introduce logic changes except: * Rename variable names. * Release virtual IRQ upon error from request_irq(). * Don't cache the virtual IRQ to opal_irqs[] upon error from request_irq(). Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -701,11 +701,49 @@ static void opal_i2c_create_devs(void)
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of_platform_device_create(np, NULL, NULL);
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}
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static void __init opal_irq_init(struct device_node *dn)
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{
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const __be32 *irqs;
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int i, irqlen;
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/* Get interrupt property */
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irqs = of_get_property(opal_node, "opal-interrupts", &irqlen);
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pr_debug("Found %d interrupts reserved for OPAL\n",
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irqs ? (irqlen / 4) : 0);
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/* Install interrupt handlers */
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opal_irq_count = irqlen / 4;
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opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL);
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for (i = 0; irqs && i < opal_irq_count; i++, irqs++) {
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unsigned int irq, virq;
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int rc;
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/* Get hardware and virtual IRQ */
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irq = be32_to_cpup(irqs);
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virq = irq_create_mapping(NULL, irq);
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if (virq == NO_IRQ) {
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pr_warn("Failed to map irq 0x%x\n", irq);
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continue;
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}
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/* Install interrupt handler */
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rc = request_irq(virq, opal_interrupt, 0, "opal", NULL);
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if (rc) {
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irq_dispose_mapping(virq);
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pr_warn("Error %d requesting irq %d (0x%x)\n",
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rc, virq, irq);
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continue;
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}
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/* Cache IRQ */
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opal_irqs[i] = virq;
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}
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}
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static int __init opal_init(void)
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{
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struct device_node *np, *consoles;
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const __be32 *irqs;
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int rc, i, irqlen;
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int rc;
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opal_node = of_find_node_by_path("/ibm,opal");
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if (!opal_node) {
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@ -731,24 +769,7 @@ static int __init opal_init(void)
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opal_i2c_create_devs();
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/* Find all OPAL interrupts and request them */
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irqs = of_get_property(opal_node, "opal-interrupts", &irqlen);
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pr_debug("Found %d interrupts reserved for OPAL\n",
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irqs ? (irqlen / 4) : 0);
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opal_irq_count = irqlen / 4;
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opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL);
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for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) {
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unsigned int hwirq = be32_to_cpup(irqs);
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unsigned int irq = irq_create_mapping(NULL, hwirq);
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if (irq == NO_IRQ) {
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pr_warning("Failed to map irq 0x%x\n", hwirq);
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continue;
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}
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rc = request_irq(irq, opal_interrupt, 0, "opal", NULL);
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if (rc)
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pr_warning("Error %d requesting irq %d (0x%x)\n",
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rc, irq, hwirq);
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opal_irqs[i] = irq;
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}
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opal_irq_init(opal_node);
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/* Create "opal" kobject under /sys/firmware */
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rc = opal_sysfs_init();
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