From e5333db9285e088a98f4bad5147bfb0b4665fafb Mon Sep 17 00:00:00 2001 From: Stefan Richter Date: Fri, 22 May 2009 23:16:27 +0200 Subject: [PATCH] firewire: core: check for missing struct update at build time, not run time struct fw_attribute_group.attrs.[] must have enough room for all attributes. This can and should be checked at build time. Our previous check at run time was a little late and not reliable since most of the time less than the available attributes are populated. Furthermore, omit an increment of an index at its last usage. Signed-off-by: Stefan Richter --- drivers/firewire/fw-device.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c index a38a68b97b58..98ce0841f4c9 100644 --- a/drivers/firewire/fw-device.c +++ b/drivers/firewire/fw-device.c @@ -292,8 +292,7 @@ static void init_fw_attribute_group(struct device *dev, group->attrs[j++] = &attr->attr; } - BUG_ON(j >= ARRAY_SIZE(group->attrs)); - group->attrs[j++] = NULL; + group->attrs[j] = NULL; group->groups[0] = &group->group; group->groups[1] = NULL; group->group.attrs = group->attrs; @@ -570,9 +569,13 @@ static void create_units(struct fw_device *device) unit->device.parent = &device->device; dev_set_name(&unit->device, "%s.%d", dev_name(&device->device), i++); + BUILD_BUG_ON(ARRAY_SIZE(unit->attribute_group.attrs) < + ARRAY_SIZE(fw_unit_attributes) + + ARRAY_SIZE(config_rom_attributes)); init_fw_attribute_group(&unit->device, fw_unit_attributes, &unit->attribute_group); + if (device_register(&unit->device) < 0) goto skip_unit; @@ -849,9 +852,13 @@ static void fw_device_init(struct work_struct *work) device->device.devt = MKDEV(fw_cdev_major, minor); dev_set_name(&device->device, "fw%d", minor); + BUILD_BUG_ON(ARRAY_SIZE(device->attribute_group.attrs) < + ARRAY_SIZE(fw_device_attributes) + + ARRAY_SIZE(config_rom_attributes)); init_fw_attribute_group(&device->device, fw_device_attributes, &device->attribute_group); + if (device_add(&device->device)) { fw_error("Failed to add device.\n"); goto error_with_cdev; -- GitLab