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Date:   Sun, 25 Sep 2022 23:51:33 +0200
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Subject: Re: v6.0-rc6 - arm64 / rock960 : kernel panic
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To:     Peter Geis <pgwipeout@gmail.com>, Heiko St??bner <heiko@sntech.de>,
        Samuel Holland <samuel@sholland.org>,
        Vinod Koul <vinod.koul@linaro.org>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@lists.infradead.org>,
        Michael Nazzareno Trimarchi <michael@amarulasolutions.com>
References: <4f398e4c-973b-7843-2f75-27324d109277@linaro.org>
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From:   Daniel Lezcano <daniel.lezcano@linaro.org>
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Hi,

after a painful git bisect, the kernel panic happens with:

commit 8dc60f8da22fdbaa1fafcfb5ff6d24bc9eff56aa (refs/bisect/bad)
Author: Peter Geis <pgwipeout@gmail.com>
Date:   Tue Jun 21 20:31:40 2022 -0400

     phy: rockchip-inno-usb2: Sync initial otg state

     The initial otg state for the phy defaults to device mode. The actual
     state isn't detected until an ID IRQ fires. Fix this by syncing the ID
     state during initialization.

     Fixes: 51a9b2c03dd3 ("phy: rockchip-inno-usb2: Handle ID IRQ")
     Signed-off-by: Peter Geis <pgwipeout@gmail.com>
     Reviewed-by: Samuel Holland <samuel@sholland.org>
     Link: 
https://lore.kernel.org/r/20220622003140.30365-1-pgwipeout@gmail.com
     Signed-off-by: Vinod Koul <vkoul@kernel.org>

Reverting it fixes the issue

=======================================================================

@@@@`0` @`@@ @@@@@@@[    3.566365] Unable to handle kernel NULL pointer 
dereference at virtual address 0000000000000000
[    3.567182] Mem abort info:
[    3.567440]   ESR = 0x0000000086000006
[    3.567783]   EC = 0x21: IABT (current EL), IL = 32 bits
[    3.568264]   SET = 0, FnV = 0
[    3.568544]   EA = 0, S1PTW = 0
[    3.568833]   FSC = 0x06: level 2 translation fault
[    3.569275] user pgtable: 4k pages, 48-bit VAs, pgdp=00000000024be000
[    3.569854] [0000000000000000] pgd=0800000001725003, 
p4d=0800000001725003, pud=0800000000f11003, pmd=0000000000000000
[    3.570912] Internal error: Oops: 86000006 [#1] PREEMPT SMP
[    3.571421] Modules linked in:
[    3.571712] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 5.19.0-rc1+ #795
[    3.572303] Hardware name: 96boards Rock960 (DT)
[    3.572722] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS 
BTYPE=--)
[    3.573354] pc : 0x0
[    3.573567] lr : call_timer_fn.constprop.0+0x24/0x80
[    3.574037] sp : ffff80000a703a50
[    3.574339] x29: ffff80000a703a50 x28: 0000000000000005 x27: 
0000000000000000
[    3.575002] x26: ffff80000a3379c0 x25: ffff0000f7798de8 x24: 
ffff80000a703ae0
[    3.575664] x23: 0000000000000000 x22: dead000000000122 x21: 
0000000000000101
[    3.576325] x20: ffff0000006b6200 x19: 0000000000000000 x18: 
0000000000000000
[    3.576986] x17: ffff8000ed773000 x16: ffff80000801c000 x15: 
00003d0900007d00
[    3.577648] x14: 0000000000000000 x13: 0000000000000000 x12: 
0000000000000000
[    3.578308] x11: 0000000000000004 x10: ffff8000ed773000 x9 : 
ffff0000f7798e30
[    3.578970] x8 : 0000000000000001 x7 : ffffffffffffffff x6 : 
0000000000000000
[    3.579630] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 
0000000000000200
[    3.580290] x2 : 0000000000000200 x1 : 0000000000000000 x0 : 
ffff000001025310
[    3.580951] Call trace:
[    3.581178]  0x0
[    3.581359]  __run_timers.part.0+0x1f0/0x234
[    3.581759]  run_timer_softirq+0x3c/0x7c
[    3.582130]  _stext+0x124/0x2a0
[    3.582430]  __irq_exit_rcu+0xe4/0x100
[    3.582790]  irq_exit_rcu+0x10/0x1c
[    3.583117]  el1_interrupt+0x38/0x70
[    3.583454]  el1h_64_irq_handler+0x18/0x24
[    3.583835]  el1h_64_irq+0x64/0x68
[    3.584156]  cpuidle_enter_state+0x130/0x2f0
[    3.584560]  cpuidle_enter+0x38/0x50
[    3.584901]  do_idle+0x214/0x29c
[    3.585210]  cpu_startup_entry+0x28/0x30
[    3.585578]  secondary_start_kernel+0x13c/0x150
[    3.586002]  __secondary_switched+0xa0/0xa4
[    3.586408] Code: bad PC value
[    3.586699] ---[ end trace 0000000000000000 ]---
[    3.587119] Kernel panic - not syncing: Oops: Fatal exception in 
interrupt
[    3.587732] SMP: stopping secondary CPUs
[    3.588230] Kernel Offset: 0x80000 from 0xffff800008000000
[    3.588725] PHYS_OFFSET: 0x0
[    3.588991] CPU features: 0x800,00127811,00001082
[    3.589420] Memory Limit: none
[    3.589724] ---[ end Kernel panic - not syncing: Oops: Fatal 
exception in interrupt ]---


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