Hi! Experimenting with AtomISP (yes, code is ugly and MSI handling rather hackish, though...). So, with v4.14 base: [ 33.639224] atomisp-isp2 0000:00:03.0: Start stream on pad 1 for asd0 [ 33.652355] atomisp-isp2 0000:00:03.0: irq:0x20 [ 33.662456] atomisp-isp2 0000:00:03.0: irq:0x20 [ 33.698064] atomisp-isp2 0000:00:03.0: stream[0] started. Ctrl+C [ 48.185643] atomisp-isp2 0000:00:03.0: <atomisp_dqbuf: -512 [ 48.204641] atomisp-isp2 0000:00:03.0: release device ATOMISP ISP CAPTURE output ... and machine still alive. With v4.15-rc1 base (basically your branch + some my hack patches) the IR Q behaviour changed, i.e. I have got: [ 85.167061] spurious APIC interrupt through vector ff on CPU#0, should never happen. [ 85.199886] atomisp-isp2 0000:00:03.0: stream[0] started. and Ctrl+C does NOT work. Machine just hangs. It might be related to this: https://lkml.org/lkml/2017/12/22/697 Any comments, Thomas? -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxx> Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
