diff options
Diffstat (limited to 'drivers/edac/altera_edac.c')
| -rw-r--r-- | drivers/edac/altera_edac.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c index 1c26e22c5b68..453e92c786c8 100644 --- a/drivers/edac/altera_edac.c +++ b/drivers/edac/altera_edac.c @@ -1125,6 +1125,20 @@ static void altr_edac_a10_irq_handler(struct irq_desc *desc) chained_irq_exit(chip, desc); } +static int validate_parent_available(struct device_node *np) +{ + struct device_node *parent; + int ret = 0; + + /* Ensure parent device is enabled if parent node exists */ + parent = of_parse_phandle(np, "altr,ecc-parent", 0); + if (parent && !of_device_is_available(parent)) + ret = -ENODEV; + + of_node_put(parent); + return ret; +} + static int altr_edac_a10_device_add(struct altr_arria10_edac *edac, struct device_node *np) { @@ -1146,6 +1160,9 @@ static int altr_edac_a10_device_add(struct altr_arria10_edac *edac, if (IS_ERR_OR_NULL(prv)) return -ENODEV; + if (validate_parent_available(np)) + return -ENODEV; + if (!devres_open_group(edac->dev, altr_edac_a10_device_add, GFP_KERNEL)) return -ENOMEM; |