On 10/6/2016 5:41 PM, Sinan Kaya wrote:
> On 10/6/2016 5:37 PM, Al Viro wrote:
>> On Thu, Oct 06, 2016 at 05:30:29PM -0400, Sinan Kaya wrote:
>>> This reverts commit acc29fb8f792 ("debugfs: ->d_parent is never NULL or
>>> negative") as it breaks the debugfs_remove_recursive API as show in the
>>> callstack below.
>>
>> NAK. Fix your code, don't break global asserts.
>>
>
> I can fix the code if you tell me what the problem is:
>
> http://lxr.free-electrons.com/ident?i=hidma_debug_uninit
>
> http://lxr.free-electrons.com/ident?i=hidma_debug_init
>
This is the directory structure:
/sys/kernel/debug/QCOM8061:00 # ls
chan0 stats
/sys/kernel/debug/QCOM8061:00 # cd chan0
/sys/kernel/debug/QCOM8061:00/chan0 # ls
stats
This is the QCOM8061:00 directory
debugfs_remove_recursive(dmadev->debugfs);
This is the stats file under the directory
debugfs_remove_recursive(dmadev->stats);
The fact that directory is removed might be leaving the stats in limbo.
Let me test without this line.
> The code didn't change between these commits.
>
> git log --oneline fs/debugfs/inode.c
>
> [doesn't work]
> 23f8a05 Merge branches 'work.misc', 'work.iget', 'work.const-qstr', 'work.splice_read' and 'current_time', remote-tracking branches 'ovl/misc' and 'ovl/
> c2050a4 fs: Replace current_fs_time() with current_time()
> e0e0be8 libfs: support RENAME_NOREPLACE in simple_rename()
> acc29fb debugfs: ->d_parent is never NULL or negative
> 5614e77 Merge 4.6-rc4 into driver-core-next
> 87243de debugfs: Make automount point inodes permanently empty
> c646880 debugfs: add support for self-protecting attribute file fops
>
> [works]
> dde78b1 Revert "debugfs: ->d_parent is never NULL or negative"
> 23f8a05 Merge branches 'work.misc', 'work.iget', 'work.const-qstr', 'work.splice_read' and 'current_time', remote-tracking branches 'ovl/misc' and 'ovl/
> c2050a4 fs: Replace current_fs_time() with current_time()
> e0e0be8 libfs: support RENAME_NOREPLACE in simple_rename()
> acc29fb debugfs: ->d_parent is never NULL or negative
> 5614e77 Merge 4.6-rc4 into driver-core-next
>
>
>
>
--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
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