Re: Dead lock in ehci hcd (3.5.3) with usb-serial adapters.

2012-10-04 Thread Alan Stern
On Thu, 4 Oct 2012, jx chang wrote: Hi, all, Recently I get a dead lock in ehci_hcd and hope someone can look at my analysis. The symptom is: When I set loglevel=8 in command line and set console=ttyUSB0, 115200n8..., and connect a usb-serial adapter to my target device (a tablet

Re: Dead lock in ehci hcd (3.5.3) with usb-serial adapters.

2012-10-04 Thread Greg KH
On Thu, Oct 04, 2012 at 12:52:24PM -0400, Alan Stern wrote: On Thu, 4 Oct 2012, jx chang wrote: Hi, all, Recently I get a dead lock in ehci_hcd and hope someone can look at my analysis. The symptom is: When I set loglevel=8 in command line and set console=ttyUSB0,

Re: Dead lock in ehci hcd (3.5.3) with usb-serial adapters.

2012-10-04 Thread jx chang
Alan and Greg, Appreciate your quick feedback. I guess even if I could fix dead lock with other APIs like spin_is_locked(), it will just make code convoluted. I don't think there is a solution either. Thanks lot for the help! On Thu, Oct 4, 2012 at 10:24 AM, Greg KH gre...@linuxfoundation.org