I am getting the kernel panic while using SMC wireless dongle with the zd1211rw driver. The system is an Embedded system.
The scenario is as follows when I get the kernel panic,
1) connect the system with secured wireless network
- I am using wpa_supplicant for this
2) Once you IP address with the help of dhcp start pinging to a system on the same network
3) when ping is going on then physically remove the dongle
At this movement the system halts, few times i can see the register dump other wise it just halts.
When I unplug the device physically then USB subsystem start the disconnection process and during this process it halts at any place.
the related info:
1) Kernel is configured for EHCI (USB2.0)
2) SMC uses Zydas 1211 chip set
3) zd1211rw driver is used
4) zd1211 v1.4 firmware is used
5) System hangs at multiple places (not at specific place in the kernel every time)
6) Linux kernel used 188.8.131.52
7) Its an embedded system with the MIPS processor (AU1250) which has on-chip USB 2.0 Host Controller
One more observation is that if I configure kernel for OHCI (USB 1.1) instead of EHCI (USB 2.0), then I could not see same behavior.
I don't have much understanding of USB subsystem. Is there any change needed in zd1211rw driver?
So could anybody help me out to resolve this issue.
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