forked from luck/tmp_suning_uos_patched
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> |
||
|---|---|---|
| .. | ||
| power | ||
| regmap | ||
| attribute_container.c | ||
| base.h | ||
| bus.c | ||
| class.c | ||
| core.c | ||
| cpu.c | ||
| dd.c | ||
| devres.c | ||
| devtmpfs.c | ||
| dma-coherent.c | ||
| dma-mapping.c | ||
| driver.c | ||
| firmware_class.c | ||
| firmware.c | ||
| hypervisor.c | ||
| init.c | ||
| isa.c | ||
| Kconfig | ||
| Makefile | ||
| map.c | ||
| memory.c | ||
| module.c | ||
| node.c | ||
| platform.c | ||
| sys.c | ||
| syscore.c | ||
| topology.c | ||
| transport_class.c | ||