PCI/PM: Add kerneldoc description of pci_pm_reset()
The pci_pm_reset() function is not a very nice interface due to its limitations and conditional behavior (e.g. it doesn't affect devices in low-power states), but it cannot be simply dropped, because existing device drivers may depend on it. However, its behavior and limitations should be well documented, so add an appropriate kerneldoc comment to it. Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl> Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
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