b43ff11736
imx_mu_isr() always calls pm_system_wakeup() even when it should not,
making the system unable to enter sleep.
Suspend fails as follows:
armadillo:~# echo mem > /sys/power/state
[ 2614.602432] PM: suspend entry (deep)
[ 2614.610640] Filesystems sync: 0.004 seconds
[ 2614.618016] Freezing user space processes ... (elapsed 0.001 seconds) done.
[ 2614.626555] OOM killer disabled.
[ 2614.629792] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 2614.638456] printk: Suspending console(s) (use no_console_suspend to debug)
[ 2614.649504] PM: Some devices failed to suspend, or early wake event detected
[ 2614.730103] PM: resume devices took 0.080 seconds
[ 2614.741924] OOM killer enabled.
[ 2614.745073] Restarting tasks ... done.
[ 2614.754532] PM: suspend exit
ash: write error: Resource busy
armadillo:~#
Upstream commit 892cb524ae8a is correct, so this seems to be a
mistake during cherry-pick.
Cc: <stable@vger.kernel.org>
Fixes: a16f5ae8ade1 ("mailbox: imx: fix wakeup failure from freeze mode")
Signed-off-by: Daisuke Mizobuchi <mizo@atmark-techno.com>
Reviewed-by: Dominique Martinet <dominique.martinet@atmark-techno.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.