On 23.07.2012 17:04, Sarbojit Ganguly wrote: > On 23 July 2012 20:17, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: >> On Mon, 23 Jul 2012, Sarbojit Ganguly wrote: >> >>> Hello Daniel, >>> >>> That is why I provided two stacks, >>> >>> 1st one is when I tried to remove the USB hub (which connects a webcam >>> + microphone) >>> 2nd one is when I tried to remove an USB powered external HDD. >>> >>> Just to make sure whether the problem is with USB sound or the USB subsystem. >> >> Do you stop all the programs that are using the USB devices before >> unplugging the hub? Do you unmount the USB HDD first? > > Yes Alan, I did unmount the HDD > >> >> The first crash shows a problem in the snd-usb-audio driver. >> >> The second crash shows a problem in the VFS layer or in ext3, not in >> the USB stack. > > Yes the issue is in evict() api which gets called when USB disconnect > is triggered. >> >> Alan Stern >> > > Even I was confused in the beginning but after thorough check I > confirmed its presence. I reverted back to my distro's stock kernel > (3.2.0-26-generic) where the issue does not recur. > > I could not analysed further (due to my limited knowledge of USB). > Did you succeed in bisecting this problem down? From what I can tell, there hasn't been any similar report on LKML yet. That makes traking the problem on your machine even more important as you can reproduce it reliably. Thanks, Daniel -- 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
