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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-05-22 21:16:27 (GMT)
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-01 10:48:49 (GMT)
commite5333db9285e088a98f4bad5147bfb0b4665fafb (patch)
tree10a46852f80d27a4eef4f51ae847c7c541c0fd07 /drivers
parent92368890d551794ee8d7e90477d8498bb7f82a9b (diff)
downloadlinux-e5333db9285e088a98f4bad5147bfb0b4665fafb.tar.xz
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 <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/firewire/fw-device.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index a38a68b..98ce084 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;