Captured from serial link with Raspberry Pi 3B+ and Infineon SLB9670 TPM2 chip, i.e.
triggers here:
static bool __flush_work(struct work_struct *work, bool from_cancel)
{
struct wq_barrier barr;
if (WARN_ON(!wq_online))
return false;
if (WARN_ON(!work->func)) /* <-- */
return false;
# uname -a
Linux buildroot 6.6.1-v8 #1 SMP PREEMPT Sun Nov 19 21:46:00 EET 2023 aarch64 GNU/Linux
# poweroff
# Stopping dropbear sshd: OK
Stopping network: [ 246.487818] smsc95xx 3-1.1:1.0 eth0: hardware isn't capable of remote wakeup
OK
Stopping klogd: OK
Stopping syslogd: OK
Seeding 256 bits and crediting
Saving 256 bits of creditable seed for next boot
umount: devtmpfs busy - remounted read-only
[ 246.623163] EXT4-fs (mmcblk0p2): re-mounted c5bb63df-c03e-4e4a-9846-0cdf5986edc4 ro. Quota mode: none.
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to al[ 248.680154] ------------[ cut here ]------------
[ 248.684825] WARNING: CPU: 1 PID: 298 at kernel/workqueue.c:3400 __flush_work.isra.0+0x29c/0x2c4
[ 248.693582] CPU: 1 PID: 298 Comm: init Tainted: G W 6.6.1-v8 #1
[ 248.700926] Hardware name: Raspberry Pi 3 Model B Rev 1.2 (DT)
[ 248.706780] pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 248.713774] pc : __flush_work.isra.0+0x29c/0x2c4
[ 248.718415] lr : __flush_work.isra.0+0x44/0x2c4
[ 248.722970] sp : ffffffc0812fb910
[ 248.726299] x29: ffffffc0812fb910 x28: ffffff8003e30e40 x27: 0000000000000000
[ 248.733481] x26: fffffff0350c9c10 x25: 0000000000000000 x24: fffffff03500c028
[ 248.740661] x23: fffffff03500d208 x22: 0000000000000001 x21: fffffff034f37568
[ 248.747840] x20: ffffff80064d9ac0 x19: ffffff80064d9a80 x18: ffffffffffffffff
[ 248.755019] x17: 0000000000000000 x16: 0000000000000000 x15: ffffffc0812fb760
[ 248.762197] x14: 0000000000000004 x13: ffffff8002808410 x12: 0000000000000000
[ 248.769376] x11: 0000000000000040 x10: fffffff034f35a98 x9 : 0000000000000004
[ 248.776554] x8 : ffffffc0812fb9a8 x7 : 0000000000000000 x6 : 00000000000003e8
[ 248.783732] x5 : fffffff034e46000 x4 : 0000000000000000 x3 : 0000000000000000
[ 248.790909] x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
[ 248.798087] Call trace:
[ 248.800546] __flush_work.isra.0+0x29c/0x2c4
[ 248.804841] flush_work+0x10/0x1c
[ 248.808177] tpm_tis_remove+0x90/0xc8
[ 248.811866] tpm_tis_spi_remove+0x24/0x34
[ 248.815901] spi_remove+0x30/0x4c
[ 248.819238] device_remove+0x4c/0x80
[ 248.822836] device_release_driver_internal+0x1d4/0x228
[ 248.828088] device_release_driver+0x18/0x24
[ 248.832381] bus_remove_device+0xcc/0x10c
[ 248.836421] device_del+0x15c/0x41c
[ 248.839934] spi_unregister_device+0x48/0x98
[ 248.844231] __unregister+0x10/0x20
[ 248.847742] device_for_each_child+0x60/0xb4
[ 248.852037] spi_unregister_controller+0x48/0x15c
[ 248.856768] bcm2835_spi_remove+0x20/0x60
[ 248.860804] platform_shutdown+0x24/0x34
[ 248.864751] device_shutdown+0x150/0x258
[ 248.868701] kernel_power_off+0x38/0x7c
[ 248.872563] __do_sys_reboot+0x200/0x238
[ 248.876511] __arm64_sys_reboot+0x24/0x30
[ 248.880546] invoke_syscall+0x48/0x114
[ 248.884324] el0_svc_common.constprop.0+0x40/0xe0
[ 248.889057] do_el0_svc+0x1c/0x28
[ 248.892397] el0_svc+0x40/0xe8
[ 248.895478] el0t_64_sync_handler+0x100/0x12c
[ 248.899864] el0t_64_sync+0x190/0x194
[ 248.903549] ---[ end trace 0000000000000000 ]---
[ 248.910555] reboot: Power down
Just putting out. I was testing https://github.com/jarkkojs/buildroot-tpmdd/tree/linux-6.6.y
and this popped up. To build sdcard.img bootable with Raspberry Pi 3:
make raspberrypi3_tpmdd_64_defconfig && make
BR, Jarkko
