diff options
Diffstat (limited to 'arch/powerpc/sysdev/mpic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index ef721c30f47..bb72a626648 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1143,8 +1143,24 @@ struct mpic * __init mpic_alloc(struct device_node *node, const char *vers; const u32 *psrc; - /* This code assumes that a non-NULL device node is passed in */ - BUG_ON(!node); + /* Default MPIC search parameters */ + static const struct of_device_id __initconst mpic_device_id[] = { + { .type = "open-pic", }, + { .compatible = "open-pic", }, + {}, + }; + + /* + * If we were not passed a device-tree node, then perform the default + * search for standardized a standardized OpenPIC. + */ + if (node) { + node = of_node_get(node); + } else { + node = of_find_matching_node(NULL, mpic_device_id); + if (!node) + return NULL; + } /* Pick the physical address from the device tree if unspecified */ if (!phys_addr) { @@ -1154,14 +1170,14 @@ struct mpic * __init mpic_alloc(struct device_node *node, } else { struct resource r; if (of_address_to_resource(node, 0, &r)) - return NULL; + goto err_of_node_put; phys_addr = r.start; } } mpic = kzalloc(sizeof(struct mpic), GFP_KERNEL); if (mpic == NULL) - return NULL; + goto err_of_node_put; mpic->name = name; mpic->paddr = phys_addr; @@ -1325,6 +1341,11 @@ struct mpic * __init mpic_alloc(struct device_node *node, isu_size ? isu_size : mpic->num_sources, &mpic_host_ops, flags & MPIC_LARGE_VECTORS ? 2048 : 256); + + /* + * FIXME: The code leaks the MPIC object and mappings here; this + * is very unlikely to fail but it ought to be fixed anyways. + */ if (mpic->irqhost == NULL) return NULL; @@ -1359,7 +1380,12 @@ struct mpic * __init mpic_alloc(struct device_node *node, irq_set_default_host(mpic->irqhost); } + of_node_put(node); return mpic; + +err_of_node_put: + of_node_put(node); + return NULL; } void __init mpic_assign_isu(struct mpic *mpic, unsigned int isu_num, |