Messages in this thread | | | Subject | Re: [linux-usb-devel] usb sysfs intf files no longer created when probe fails | From | Stelian Pop <> | Date | Wed, 22 Jun 2005 16:56:30 +0200 |
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Le mercredi 22 juin 2005 à 16:07 +0200, Stelian Pop a écrit : > Le mercredi 22 juin 2005 à 15:50 +0200, Stelian Pop a écrit : > > > I use the 'atp' input driver from http://popies.net/atp/ to drive this > > touchpad. When removing the driver I also get an oops, possibly related > > to the previous failure to create the sysfs file:
Ok, there are two separate problems here:
1. The sysfs intf entry is not created, and this causes the oops later when trying to remove the entry, etc.
I've tracked this problem back to this patch: [PATCH] driver core: fix error handling in bus_add_device http://www.kernel.org/git/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ca2b94ba12f3c36fd3d6ed9d38b3798d4dad0d8b
Once the patch above is reverted, I have no more oops, my driver can be loaded/unloaded just fine, and the /sys/devices/.../ is present.
However, I'm not really sure if the problem comes from the above patch or from my driver which should manually call usb_create_sysfs_intf_files() or something equivalent.
2. There is still a problem with the early loading of the driver. If loaded at boot, it won't work. If I rmmod/insmod it later it does.
Stelian. -- Stelian Pop <stelian@popies.net>
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