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>
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File | Mode | Size |
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postprocess | ||
coresight-cpu-debug.txt | -rw-r--r-- | 8.0 KB |
coresight.txt | -rw-r--r-- | 16.0 KB |
events-kmem.txt | -rw-r--r-- | 5.3 KB |
events-msr.txt | -rw-r--r-- | 700 bytes |
events-nmi.txt | -rw-r--r-- | 1.5 KB |
events-power.txt | -rw-r--r-- | 3.4 KB |
events.txt | -rw-r--r-- | 100.0 KB |
ftrace-design.txt | -rw-r--r-- | 14.5 KB |
ftrace.txt | -rw-r--r-- | 119.3 KB |
function-graph-fold.vim | -rw-r--r-- | 1.3 KB |
hwlat_detector.txt | -rw-r--r-- | 3.8 KB |
intel_th.txt | -rw-r--r-- | 4.7 KB |
kprobetrace.txt | -rw-r--r-- | 7.5 KB |
mmiotrace.txt | -rw-r--r-- | 6.6 KB |
ring-buffer-design.txt | -rw-r--r-- | 29.9 KB |
stm.txt | -rw-r--r-- | 5.5 KB |
tracepoint-analysis.txt | -rw-r--r-- | 12.0 KB |
tracepoints.txt | -rw-r--r-- | 5.1 KB |
uprobetracer.txt | -rw-r--r-- | 6.6 KB |
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