Hi! > On Mon, Feb 12, 2018 at 09:10:00PM +0100, Pavel Machek wrote: > > Hi! > > > > During tethering, I got oops in ssi_stop_tx(), followed by failure of > > GPRS. I used GPRS tethering a lot with some older kernel, and it was > > stable for hours. > > > > It seems v4.12 has the same problem. In v4.15 usb networking does not > > work at all, so I can't test... v4.10 seems to have similar problem. > > (Testing is > > slighlty tricky, as my internet connection is ... tethering using > > N900.) > > Based on a quick look ssi_stop_tx() is called too many times (i.e. once > more than ssi_start_tx()). This would appear to be an interal problem > with the SSI codebase (or whatever lies there; I don't know the current > codebase).
If I change BUG_ON in ssi_stop_tx() to warning and return, I see the warning and system survives it. > Did this work in the past? When? There appear to have been changes in IRQ > handling some time in 2016... Actually, I'm not sure any more :-(. I did have tethering running overnight some time ago, but it was on slower mobile data, and over wifi. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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