Kernel Oops after unplugging the device

[DinoTools]

Hi,

I use the nwfermi driver on Debian Squeeze with a touch monitor from Chilin. Everything works fine. But after unplugging the device or turning it off there is a kernel Oops.

Kernel: 2.6.32-5-686
Arch: i368
Driver: 0.6.1.0

I have attached the log messages from dmesg. Can you please fix the bug or provide a workaround.

Please don't hesitate to ask if you have any questions or if you need more information.

[DinoTools (oss-dinotools-de)]

Hi,

I think I have fixed the problem. I have modified only a few lines. For more information have a look at the attached patch.

The patch has been tested with Debian Squeeze (i386)

[Lars Kühn (78luphr0rnk2nuq-launchpad)]

Patch works for me!

[DinoTools (oss-dinotools-de)]

Hi,

the first patch only works in some situations. So I created a new one and have attached it to this message. The main problem is, that the kernel tries to disconnect two devices in some cases. The first device is a device with a minor number equal to or larger than 0. And the second device is always a device with a minor number equal to -1. The first disconnect works perfectly but the second one crashes with a NULL-pointer dereference.

I'm currently testing the patch with 8 touch monitors and Debian 6.0 and as far as I can see it works very well.

I hope it helps.