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sysfs: bugfix: shorten too long file names

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* In old kernels (e.g: 2.6.18) sysfs file names must be shorter
  then KOBJ_NAME_LEN.

* Longer names are truncated and this leads to duplicate names
  which fails device_register()
  Examples: "dahdi!channels!10!10" is truncated to "dahdi!channels!10!1"

* The fix shorten the names and make them fixed length. Example:
            "dahdi!chan!010!010"

* It seems no current userspace tools rely on that name or on
  /dev/dahdi/channels .

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
This commit is contained in:
Oron Peled
2013-06-17 16:26:28 +03:00
committed by Tzafrir Cohen
parent 431571b5fc
commit 8ea23535dc
2 changed files with 5 additions and 3 deletions
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2
drivers/dahdi/dahdi-sysfs-chan.c
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@@ -247,7 +247,7 @@ int chan_sysfs_create(struct dahdi_chan *chan)
/*
* FIXME: the name cannot be longer than KOBJ_NAME_LEN
*/
dev_set_name(dev, "dahdi!channels!%d!%d", span->spanno, chan->chanpos);
dev_set_name(dev, "dahdi!chan!%03d!%03d", span->spanno, chan->chanpos);
dev_set_drvdata(dev, chan);
dev->release = chan_release;
res = device_register(dev);