On Tue, Jul 3, 2018 at 5:40 PM, Andy Shevchenko <andy.shevchenko@xxxxxxxxx> wrote: > And here just a wild guess, if you comment out a BUG() in IRQ handler, > does it boot? Not really. It fails a bit later: [ 3.863231] caam 2100000.caam: Entropy delay = 3200 [ 3.929028] caam 2100000.caam: Instantiated RNG4 SH0 [ 3.989789] caam 2100000.caam: Instantiated RNG4 SH1 [ 3.994809] caam 2100000.caam: device ID = 0x0a16010000000000 (Era 4) [ 4.001313] caam 2100000.caam: job rings = 2, qi = 0 [ 4.019569] mmcblk1: p1 p2 [ 4.021007] caam algorithms registered in /proc/crypto [ 4.030633] caam_jr 2101000.jr0: job ring error: irqstate: 00000103 [ 4.037036] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM [ 4.043751] Modules linked in: [ 4.046829] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc3-next-20180703-00001-g62a05d4-dirty #498 [ 4.056317] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 4.062869] PC is at caam_jr_dequeue+0x240/0x2bc [ 4.067499] LR is at 0x1 [ 4.070042] pc : [<c075e6bc>] lr : [<00000001>] psr: 60000113 [ 4.076317] sp : c1001d58 ip : ec85c000 fp : c1001da4 [ 4.081549] r10: ec858010 r9 : ec85c000 r8 : 00000000 [ 4.086783] r7 : 000001ff r6 : 00000001 r5 : 00000000 r4 : 00000000 [ 4.093318] r3 : ffffffff r2 : 00000000 r1 : 00000000 r0 : 00000001 [ 4.099856] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 4.106999] Control: 10c5387d Table: 1000404a DAC: 00000051 [ 4.112754] Process swapper/0 (pid: 0, stack limit = 0x(ptrval)) [ 4.118771] Stack: (0xc1001d58 to 0xc1002000)