4080ab0830
If the target device has any suppliers, as reflected by device links to them, __pm_runtime_set_status() does not take them into account, which is not consistent with the other parts of the PM-runtime framework and may lead to programming mistakes. Modify __pm_runtime_set_status() to take suppliers into account by activating them upfront if the new status is RPM_ACTIVE and deactivating them on exit if the new status is RPM_SUSPENDED. If the activation of one of the suppliers fails, the new status will be RPM_SUSPENDED and the (remaining) suppliers will be deactivated on exit (the child count of the device's parent will be dropped too then). Of course, adding device links locking to __pm_runtime_set_status() means that it cannot be run fron interrupt context, so make it use spin_lock_irq() and spin_unlock_irq() instead of spin_lock_irqsave() and spin_unlock_irqrestore(), respectively. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.