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Ensure that if sdw_handle_slave_status() sees a peripheral has dropped off the bus it reports it to the client driver. If there are any devices reporting on address 0 it bails out after programming the device IDs. So it never reaches the second loop that calls sdw_update_slave_status(). If the missing device is one that is now showing as unenumerated it has been given a device ID so will report as attached next time sdw_handle_slave_status() runs. With the previous code the client driver would only see another ATTACHED notification because the UNATTACHED state was lost when sdw_handle_slave_status() bailed out after programming the device ID. This shows up most when the peripheral has to be reset after downloading updated firmware and there are multiple of these peripherals on the bus. They will all return to unenumerated state after the reset, and then there is a mix of unattached, attached and unenumerated PING states from the peripherals, as each is reset and they reboot. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20220914160248.1047627-3-rf@opensource.cirrus.com Signed-off-by: Vinod Koul <vkoul@kernel.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.