On Mon, Nov 08, 2010 at 07:04:46PM +0100, XI wrote: > Greg KH wrote: > >On Tue, Oct 26, 2010 at 05:53:14PM +0200, XI wrote: > >>Hi, there seems to be a regression in latest kernels regarding Edgeport > >>USB <-> serial devices. > >> > >> > >> > >>*** Problem description: > >> > >>I use USB <-> Serial converters from Inside Out Networks (model > >>Edgeport 4S & Edgeport 8S, kernel driver io_ti) > >> > >>Since kernel 2.6.33, disconnecting the USB plug of the device _while > >>a transfer is in progress_ cause severe problem to the Linux kernel: > >> -> Kernel OOPS in 2.6.33.x to 2.6.34.x series (No USB device is > >>working after this Oops) > >> -> Computer hang in 2.6.36 (there is no Oops anymore but the > >>problem is even worst because the computer is stuck until I > >>reconnect the device / and sometimes forever) > >> -> Note: 2.6.35.x also fail but I don't remember if they produce an > >>Oops. Also note that 2.6.32.24 and previous works just fine. > > > >Hm, can you run 'git bisect' between 2.6.32 and 2.6.33 to try to find > >the problem patch that caused this issue? > > > >thanks, > > > >greg k-h > > > > > > Hi, > > I have run git bisect between 2.6.32 and v2.6.33. Git result is below : > " > git bisect bad > e1108a63e10d344284011cccc06328b2cd3e5da3 is the first bad commit > commit e1108a63e10d344284011cccc06328b2cd3e5da3 > Author: Alan Cox <alan@xxxxxxxxxxxxxxx> > Date: Tue Oct 6 16:06:36 2009 +0100 > > usb_serial: Use the shutdown() operation > > As Alan Stern pointed out - now we have tty_port_open the > shutdown method and locking allow us to whack the other bits into > the full helper methods and provide a shutdown op which the tty port > code will synchronize with setup for us. > > Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx> > Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > Cc: Oliver Neukum <oliver@xxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> > > :040000 040000 415f5c46a1bb71a4fe6f7d76ab3149e955ef0ed6 > 561d8a0423a9f996eebffed326eeb2ced14ef046 M drivers > " > > It seems related to my problem since the OOPS occurs when I > disconnect the Edgeport USB<->Serial device. > > What do you think ? Possibly, but that seems odd. Which driver are you using here, the io_edgeport or io_ti driver? And can you test 2.6.36.1? I can't duplicate this problem here with that kernel version. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
