path: root/lib/kobject.c
diff options
authorKay Sievers <kay.sievers@vrfy.org>2009-04-18 15:05:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-20 08:12:58 -0700
commit8a577ffc75d9194fe8cdb7479236f2081c26ca1f (patch)
treef15b037eb9d8463a8fe4a984e35b76e5af34ad67 /lib/kobject.c
parentd91dfbb41bb2e9bdbfbd2cc7078ed7436eab027a (diff)
driver: dont update dev_name via device_add path
notice one system /proc/iomem some entries missed the name for pci_devices it turns that dev->dev.kobj name is changed after device_add. for pci code: via acpi_pci_root_driver.ops.add (aka acpi_pci_root_add) ==> pci_acpi_scan_root is used to scan pci bus/device, and at the same time we read the resource for pci_dev in the pci_read_bases, we have res->name = pci_name(pci_dev); pci_name is calling dev_name. later via acpi_pci_root_driver.ops.start (aka acpi_pci_root_start) ==> pci_bus_add_device to add all pci_dev in kobj tree. pci_bus_add_device will call device_add. actually in device_add /* first, register with generic layer. */ error = kobject_add(&dev->kobj, dev->kobj.parent, "%s", dev_name(dev)); if (error) goto Error; will get one new name for that kobj, old name is freed. [Impact: fix corrupted names in /proc/iomem ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/kobject.c')
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/kobject.c b/lib/kobject.c
index a6dec32f2dd..bacf6fe4f7a 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -218,6 +218,9 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
const char *old_name = kobj->name;
char *s;
+ if (kobj->name && !fmt)
+ return 0;
kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs);
if (!kobj->name)
return -ENOMEM;