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The reliance on the remoteproc's state for determining when to send sysmon notifications to a remote processor is racy with regard to concurrent remoteproc operations. Further more the advertisement of the state of other remote processor to a newly started remote processor might not only send the wrong state, but might result in a stream of state changes that are out of order. Address this by introducing state tracking within the sysmon instances themselves and extend the locking to ensure that the notifications are consistent with this state. Fixes:1f36ab3f6e("remoteproc: sysmon: Inform current rproc about all active rprocs") Fixes:1877f54f75("remoteproc: sysmon: Add notifications for events") Fixes:1fb82ee806("remoteproc: qcom: Introduce sysmon") Cc: stable@vger.kernel.org Reviewed-by: Rishabh Bhatnagar <rishabhb@codeaurora.org> Link: https://lore.kernel.org/r/20201122054135.802935-2-bjorn.andersson@linaro.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.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.