Revision 2aa70f864955bf02362e3fb3008e4208d7a17a98 authored by Geert Uytterhoeven on 13 September 2017, 17:42:05 UTC, committed by David S. Miller on 15 September 2017, 21:24:49 UTC
If the network interface is kept running during suspend, the net core
may call net_device_ops.ndo_start_xmit() while the Ethernet device is
still suspended, which may lead to a system crash.
E.g. on sh73a0/kzm9g and r8a73a4/ape6evm, the external Ethernet chip is
driven by a PM controlled clock. If the Ethernet registers are accessed
while the clock is not running, the system will crash with an imprecise
external abort.
As this is a race condition with a small time window, it is not so easy
to trigger at will. Using pm_test may increase your chances:
# echo 0 > /sys/module/printk/parameters/console_suspend
# echo platform > /sys/power/pm_test
# echo mem > /sys/power/state
To fix this, make sure the network interface is quietened during
suspend.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 7095c97
| File | Mode | Size |
|---|---|---|
| bpf | ||
| cgroup | ||
| configs | ||
| debug | ||
| events | ||
| gcov | ||
| irq | ||
| livepatch | ||
| locking | ||
| power | ||
| printk | ||
| rcu | ||
| sched | ||
| time | ||
| trace | ||
| .gitignore | -rw-r--r-- | 69 bytes |
| Kconfig.freezer | -rw-r--r-- | 52 bytes |
| Kconfig.hz | -rw-r--r-- | 1.6 KB |
| Kconfig.locks | -rw-r--r-- | 4.8 KB |
| Kconfig.preempt | -rw-r--r-- | 2.1 KB |
| Makefile | -rw-r--r-- | 3.9 KB |
| acct.c | -rw-r--r-- | 15.4 KB |
| async.c | -rw-r--r-- | 9.9 KB |
| audit.c | -rw-r--r-- | 62.1 KB |
| audit.h | -rw-r--r-- | 11.0 KB |
| audit_fsnotify.c | -rw-r--r-- | 6.1 KB |
| audit_tree.c | -rw-r--r-- | 23.9 KB |
| audit_watch.c | -rw-r--r-- | 14.6 KB |
| auditfilter.c | -rw-r--r-- | 33.9 KB |
| auditsc.c | -rw-r--r-- | 65.3 KB |
| backtracetest.c | -rw-r--r-- | 2.1 KB |
| bounds.c | -rw-r--r-- | 703 bytes |
| capability.c | -rw-r--r-- | 13.9 KB |
| compat.c | -rw-r--r-- | 16.6 KB |
| configs.c | -rw-r--r-- | 2.8 KB |
| context_tracking.c | -rw-r--r-- | 6.3 KB |
| cpu.c | -rw-r--r-- | 43.3 KB |
| cpu_pm.c | -rw-r--r-- | 6.0 KB |
| crash_core.c | -rw-r--r-- | 11.2 KB |
| crash_dump.c | -rw-r--r-- | 1.3 KB |
| cred.c | -rw-r--r-- | 21.5 KB |
| delayacct.c | -rw-r--r-- | 4.5 KB |
| dma.c | -rw-r--r-- | 3.6 KB |
| elfcore.c | -rw-r--r-- | 396 bytes |
| exec_domain.c | -rw-r--r-- | 1.4 KB |
| exit.c | -rw-r--r-- | 44.1 KB |
| extable.c | -rw-r--r-- | 4.3 KB |
| fork.c | -rw-r--r-- | 58.8 KB |
| freezer.c | -rw-r--r-- | 4.4 KB |
| futex.c | -rw-r--r-- | 95.2 KB |
| futex_compat.c | -rw-r--r-- | 4.5 KB |
| groups.c | -rw-r--r-- | 4.9 KB |
| hung_task.c | -rw-r--r-- | 6.2 KB |
| irq_work.c | -rw-r--r-- | 4.4 KB |
| jump_label.c | -rw-r--r-- | 19.2 KB |
| kallsyms.c | -rw-r--r-- | 16.5 KB |
| kcmp.c | -rw-r--r-- | 5.7 KB |
| kcov.c | -rw-r--r-- | 6.9 KB |
| kexec.c | -rw-r--r-- | 7.0 KB |
| kexec_core.c | -rw-r--r-- | 30.8 KB |
| kexec_file.c | -rw-r--r-- | 25.4 KB |
| kexec_internal.h | -rw-r--r-- | 885 bytes |
| kmod.c | -rw-r--r-- | 5.0 KB |
| kprobes.c | -rw-r--r-- | 62.6 KB |
| ksysfs.c | -rw-r--r-- | 6.3 KB |
| kthread.c | -rw-r--r-- | 32.1 KB |
| latencytop.c | -rw-r--r-- | 7.9 KB |
| memremap.c | -rw-r--r-- | 15.0 KB |
| module-internal.h | -rw-r--r-- | 458 bytes |
| module.c | -rw-r--r-- | 110.4 KB |
| module_signing.c | -rw-r--r-- | 2.2 KB |
| notifier.c | -rw-r--r-- | 16.3 KB |
| nsproxy.c | -rw-r--r-- | 6.5 KB |
| padata.c | -rw-r--r-- | 25.4 KB |
| panic.c | -rw-r--r-- | 16.2 KB |
| params.c | -rw-r--r-- | 23.1 KB |
| pid.c | -rw-r--r-- | 14.9 KB |
| pid_namespace.c | -rw-r--r-- | 11.8 KB |
| profile.c | -rw-r--r-- | 14.8 KB |
| ptrace.c | -rw-r--r-- | 32.7 KB |
| range.c | -rw-r--r-- | 3.0 KB |
| reboot.c | -rw-r--r-- | 13.3 KB |
| relay.c | -rw-r--r-- | 32.1 KB |
| resource.c | -rw-r--r-- | 39.3 KB |
| seccomp.c | -rw-r--r-- | 24.1 KB |
| signal.c | -rw-r--r-- | 95.9 KB |
| smp.c | -rw-r--r-- | 21.3 KB |
| smpboot.c | -rw-r--r-- | 13.3 KB |
| smpboot.h | -rw-r--r-- | 601 bytes |
| softirq.c | -rw-r--r-- | 19.0 KB |
| stacktrace.c | -rw-r--r-- | 1.8 KB |
| stop_machine.c | -rw-r--r-- | 17.1 KB |
| sys.c | -rw-r--r-- | 60.5 KB |
| sys_ni.c | -rw-r--r-- | 7.2 KB |
| sysctl.c | -rw-r--r-- | 73.4 KB |
| sysctl_binary.c | -rw-r--r-- | 50.9 KB |
| task_work.c | -rw-r--r-- | 3.1 KB |
| taskstats.c | -rw-r--r-- | 15.4 KB |
| test_kprobes.c | -rw-r--r-- | 7.4 KB |
| torture.c | -rw-r--r-- | 21.0 KB |
| tracepoint.c | -rw-r--r-- | 14.6 KB |
| tsacct.c | -rw-r--r-- | 5.1 KB |
| ucount.c | -rw-r--r-- | 5.7 KB |
| uid16.c | -rw-r--r-- | 5.0 KB |
| umh.c | -rw-r--r-- | 15.2 KB |
| up.c | -rw-r--r-- | 2.0 KB |
| user-return-notifier.c | -rw-r--r-- | 1.3 KB |
| user.c | -rw-r--r-- | 5.4 KB |
| user_namespace.c | -rw-r--r-- | 27.4 KB |
| utsname.c | -rw-r--r-- | 3.6 KB |
| utsname_sysctl.c | -rw-r--r-- | 3.0 KB |
| watchdog.c | -rw-r--r-- | 25.3 KB |
| watchdog_hld.c | -rw-r--r-- | 7.3 KB |
| workqueue.c | -rw-r--r-- | 156.7 KB |
| workqueue_internal.h | -rw-r--r-- | 2.2 KB |
Computing file changes ...
