Hi stable team,
I would suggest to apply the patch
470a66268856 ("i2c: stm32f7: Add atomic_xfer method to driver")
from 6.7-rc1 to the stable Kernel 6.6.y.
Here is why:
After the commit
6e9df38f359a ("mfd: stpmic1: Add PMIC poweroff via sys-off handler")
from 6.5-rc1 the following WARNING appears after calling the poweroff
command:
[ 791.813369] systemd-shutdown[1]: Syncing filesystems and block devices.
[ 792.865580] systemd-shutdown[1]: Sending SIGTERM to remaining processes...
[ 792.921103] systemd-journald[101]: Received SIGTERM from PID 1 (systemd-shutdow).
[ 792.936515] systemd-shutdown[1]: Sending SIGKILL to remaining processes...
[ 792.968715] systemd-shutdown[1]: Unmounting file systems.
[ 792.979332] (sd-remount)[315]: Remounting '/' read-only with options ''.
[ 793.219266] EXT4-fs (mmcblk2p4): re-mounted f7da42a1-2eed-4d39-a31e-e0ffadb97b28 ro. Quota mode: disabled.
[ 793.238398] systemd-shutdown[1]: All filesystems unmounted.
[ 793.242736] systemd-shutdown[1]: Deactivating swaps.
[ 793.248004] systemd-shutdown[1]: All swaps deactivated.
[ 793.252937] systemd-shutdown[1]: Detaching loop devices.
[ 793.272548] systemd-shutdown[1]: All loop devices detached.
[ 793.276918] systemd-shutdown[1]: Stopping MD devices.
[ 793.282790] systemd-shutdown[1]: All MD devices stopped.
[ 793.287128] systemd-shutdown[1]: Detaching DM devices.
[ 793.292995] systemd-shutdown[1]: All DM devices detached.
[ 793.297731] systemd-shutdown[1]: All filesystems, swaps, loop devices, MD devices and DM devices detached.
[ 793.320636] systemd-shutdown[1]: Syncing filesystems and block devices.
[ 793.326078] systemd-shutdown[1]: Powering off.
[ 793.348421] reboot: Power down
[ 793.350129] ------------[ cut here ]------------
[ 793.354691] WARNING: CPU: 0 PID: 1 at drivers/i2c/i2c-core.h:42 i2c_transfer+0x5d/0x7c
[ 793.362617] No atomic I2C transfer handler for 'i2c-2'
[ 793.367780] Modules linked in:
[ 793.370838] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 6.6.41-lardisbox2-00053-g41e0b7f0166f #12
[ 793.380047] Hardware name: STM32 (Device Tree Support)
[ 793.385122] unwind_backtrace from show_stack+0xb/0xc
[ 793.390215] show_stack from dump_stack_lvl+0x2b/0x34
[ 793.395202] dump_stack_lvl from __warn+0x5d/0xc4
[ 793.399993] __warn from warn_slowpath_fmt+0x55/0xa8
[ 793.404887] warn_slowpath_fmt from i2c_transfer+0x5d/0x7c
[ 793.410387] i2c_transfer from regmap_i2c_read+0x41/0x6c
[ 793.415681] regmap_i2c_read from _regmap_raw_read+0x87/0xe8
[ 793.421378] _regmap_raw_read from _regmap_bus_read+0x21/0x38
[ 793.427079] _regmap_bus_read from _regmap_read+0x55/0x9c
[ 793.432477] _regmap_read from _regmap_update_bits+0x71/0xa4
[ 793.438175] _regmap_update_bits from regmap_update_bits_base+0x2f/0x42
[ 793.444784] regmap_update_bits_base from stpmic1_power_off+0x19/0x20
[ 793.451188] stpmic1_power_off from sys_off_notify+0x1b/0x38
[ 793.456880] sys_off_notify from notifier_call_chain+0x57/0x78
[ 793.462668] notifier_call_chain from atomic_notifier_call_chain+0x11/0x16
[ 793.469562] atomic_notifier_call_chain from do_kernel_power_off+0x21/0x38
[ 793.476461] do_kernel_power_off from __do_sys_reboot+0xdf/0x150
[ 793.482456] __do_sys_reboot from ret_fast_syscall+0x1/0x5c
[ 793.488042] Exception stack(0xf0815fa8 to 0xf0815ff0)
[ 793.493017] 5fa0: 00000000 00000000 fee1dead 28121969 4321fedc 00000000
[ 793.501218] 5fc0: 00000000 00000000 00000000 00000058 0001884c 00000003 00000000 00018140
[ 793.509414] 5fe0: 00000058 bee18c34 b6c20cdd b6b995a6
[ 793.514478] ---[ end trace 000000000000000
This can be eliminated by backporting the above mentioned patch. I tested
it with a DHCOM stm32mp157c on a PDK2 board.
Thanks and regards
Christoph
