linux-kernel - Re: [PATCH v2] Bluetooth: Really fix registering hci with duplicate name

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Message-ID: <1338176868.15105.113.camel@aeonflux>
Date:	Mon, 28 May 2012 05:47:48 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Sasha Levin <levinsasha928@...il.com>
Cc:	gustavo@...ovan.org, johan.hedberg@...il.com, davem@...emloft.net,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Bluetooth: Really fix registering hci with duplicate
 name

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@...il.com>
> ---
> 
> 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.

Regards

Marcel


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