mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-24 18:38:38 +00:00
02b26774af
Currently the use of pm_runtime_put_sync() is not safe from interrupts-disabled context because rpm_idle() will release the spinlock and enable interrupts for the idle callbacks. This enables interrupts during a time where interrupts were expected to be disabled, and can have strange side effects on drivers that expected interrupts to be disabled. This is not a bug since the documentation clearly states that only _put_sync_suspend() is safe in IRQ-safe mode. However, pm_runtime_put_sync() could be made safe when in IRQ-safe mode by releasing the spinlock but not re-enabling interrupts, which is what this patch aims to do. Problem was found when using some buggy drivers that set pm_runtime_irq_safe() and used _put_sync() in interrupts-disabled context. Reported-by: Colin Cross <ccross@google.com> Tested-by: Nishanth Menon <nm@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> |
||
---|---|---|
.. | ||
clock_ops.c | ||
domain.c | ||
generic_ops.c | ||
main.c | ||
Makefile | ||
opp.c | ||
power.h | ||
runtime.c | ||
sysfs.c | ||
trace.c | ||
wakeup.c |