From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Mon, 19 Feb 2018 20:04:54 +0100 Subject: v4.13 on nokia n900: oops during tethering In-Reply-To: <20180213222412.GA1116@mara.localdomain> References: <20180212201000.GA25608@amd> <20180213222412.GA1116@mara.localdomain> Message-ID: <20180219190454.GB19366@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: