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When a timestamp update or an event acknowledgment command times out, the driver invokes the soft reset handler to recover the controller while holding a mutex lock. The soft reset handler also tries to acquire the same mutex to send initialization commands to the controller which leads to a deadlock scenario. To resolve the issue the driver will check thestatus and if this indicates the controller is operational, the driver will issue a diagnostic fault reset and exit out of the command processing function. If the controller is already faulted or asynchronously reset, then the driver will just exit the command processing function. Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com> Link: https://lore.kernel.org/r/20230804104248.118924-2-ranjan.kumar@broadcom.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.