Does anybody have an idea why this driver crashes? I tried to bisect it. But that turns out to be very hard as the intermediate versions are all very unstable, too. For various reasons. Therefore, I aborted my bisect attempt. But if you have an idea what patch I could try, I'd be very happy to do so. -- Michael Büsch https://bues.ch/ On Wed, 9 Feb 2022 17:05:50 +0100 Michael Büsch <m@xxxxxxx> wrote: > Hi, > > on the latest stable 5.16.8 (df659ebe) the Mediatek WLAN driver > crashes on my machine in a DMA function. > > Please excuse me for the crappy photos. The first one has been > captured out of a video. Therefore it's partially interleaved with the > predecessor frame. > > https://bues.ch/misc/mt7921/mt7921_oops1.jpg > https://bues.ch/misc/mt7921/mt7921_oops2.jpg > > Most of the time the crash happens right during system boot. > > The stable kernel 5.15.y does not crash. (However, I frequently get > connection interruptions. But I'm not sure whether that's related to > the driver.) > > 03:00.0 Network controller: MEDIATEK Corp. MT7921 802.11ax PCI > Express Wireless Network Adapter > > 03:00.0 0280: 14c3:7961 > Subsystem: 17aa:e0bc > Physical Slot: 0 > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- > ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- > FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- > INTx- Latency: 0, Cache Line Size: 32 bytes Interrupt: pin A routed > to IRQ 94 IOMMU group: 11 > Region 0: Memory at 670200000 (64-bit, prefetchable) [size=1M] > Region 2: Memory at 670300000 (64-bit, prefetchable) > [size=16K] Region 4: Memory at 670304000 (64-bit, prefetchable) > [size=4K] Capabilities: <access denied> > Kernel driver in use: mt7921e > Kernel modules: mt7921e > >
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