Hi,
On Mon, May 28, 2012 at 05:47:48AM +0200, Marcel Holtmann wrote:
> Hi Sasha,
>
> > Commit fc50744 ("Bluetooth: Fix registering hci with duplicate name") didn't
> > fully fix the duplicate naming issue with devices, and duplicate device names
> > could still be created:
> >
> > [ 142.484097] device: 'hci1': device_add
> > [...]
> > [ 150.545263] device: 'hci1': device_add
> > [ 150.550128] kobject: 'hci1' (ffff880014cc4e58): kobject_add_internal: parent: 'bluetooth', set: 'devices'
> > [ 150.558979] ------------[ cut here ]------------
> > [ 150.561438] WARNING: at fs/sysfs/dir.c:529 sysfs_add_one+0xb0/0xd0()
> > [ 150.572974] Hardware name: Bochs
> > [ 150.580502] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1'
> > [ 150.584444] Pid: 7563, comm: trinity-child1 Tainted: G W 3.4.0-next-20120524-sasha #296
> > [...]
> >
> > Instead of the weird logic and the attempt at keeping the device list sorted,
> > just use an IDA.
> >
> > Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
> > ---
> >
> > Changes from v1:
> >
> > - Address comments by Marcel.
> > - Remove errornous mutex lock.
> >
> > net/bluetooth/hci_core.c | 41 ++++++++++++++++++++++++-----------------
> > 1 files changed, 24 insertions(+), 17 deletions(-)
>
> thanks for addressing this. Patch has been applied to bluetooth-next
> tree.
The patch looks OK but I start to notice kmemleak messages like
shown below:
...
unreferenced object 0xf46e4ed8 (size 148):
comm "modprobe", pid 656, jiffies 4294900233 (age 4661.940s)
hex dump (first 32 bytes):
00 00 00 00 40 4e 6e f4 00 00 00 00 00 00 00 00 ....@Nn.........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<c154dfcc>] kmemleak_alloc+0x3c/0xa0
[<c1132c7a>] kmem_cache_alloc+0x14a/0x190
[<c12af2dd>] idr_pre_get+0x5d/0x80
[<c12af3e5>] ida_pre_get+0x15/0x90
[<c12af497>] ida_simple_get+0x37/0xe0
[<f8369b79>] 0xf8369b79
[<f81be63e>] 0xf81be63e
[<c13f2a5e>] usb_probe_interface+0xce/0x210
[<c13733cb>] driver_probe_device+0x8b/0x370
[<c1373749>] __driver_attach+0x99/0xa0
[<c1371902>] bus_for_each_dev+0x42/0x70
[<c1372ea1>] driver_attach+0x21/0x30
[<c1372a47>] bus_add_driver+0x1c7/0x2e0
[<c1373bf6>] driver_register+0x66/0x110
[<c13f1acb>] usb_register_driver+0x7b/0x140
[<f8005017>] 0xf8005017
unreferenced object 0xf454c260 (size 148):
comm "modprobe", pid 656, jiffies 4294900233 (age 4661.940s)
hex dump (first 32 bytes):
00 00 00 00 d8 4e 6e f4 00 00 00 00 00 00 00 00 .....Nn.........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<c154dfcc>] kmemleak_alloc+0x3c/0xa0
[<c1132c7a>] kmem_cache_alloc+0x14a/0x190
[<c12af2dd>] idr_pre_get+0x5d/0x80
[<c12af3e5>] ida_pre_get+0x15/0x90
[<c12af497>] ida_simple_get+0x37/0xe0
[<f8369b79>] 0xf8369b79
[<f81be63e>] 0xf81be63e
[<c13f2a5e>] usb_probe_interface+0xce/0x210
[<c13733cb>] driver_probe_device+0x8b/0x370
[<c1373749>] __driver_attach+0x99/0xa0
[<c1371902>] bus_for_each_dev+0x42/0x70
[<c1372ea1>] driver_attach+0x21/0x30
[<c1372a47>] bus_add_driver+0x1c7/0x2e0
[<c1373bf6>] driver_register+0x66/0x110
[<c13f1acb>] usb_register_driver+0x7b/0x140
[<f8005017>] 0xf8005017
...
Best regards
Andrei Emeltchenko
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