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Rafael J. Wysocki
44cc89f764
Because the PM-runtime status of the device is not updated in
__rpm_callback(), attempts to suspend the suppliers of the given
device triggered by rpm_put_suppliers() called by it may fail.
Fix this by making __rpm_callback() update the device's status to
RPM_SUSPENDED before calling rpm_put_suppliers() if the current
status of the device is RPM_SUSPENDING and the callback just invoked
by it has returned 0 (success).
While at it, modify the code in __rpm_callback() to always check
the device's PM-runtime status under its PM lock.
Link: https://lore.kernel.org/linux-pm/CAPDyKFqm06KDw_p8WXsM4dijDbho4bb6T4k50UqqvR1_COsp8g@mail.gmail.com/
Fixes: 21d5c57b37 ("PM / runtime: Use device links")
Reported-by: Elaine Zhang <[email protected]>
Diagnosed-by: Ulf Hansson <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Tested-by: Elaine Zhang <[email protected]>
Reviewed-by: Ulf Hansson <[email protected]>
Cc: 4.10+ <[email protected]> # 4.10+
Signed-off-by: Rafael J. Wysocki <[email protected]>