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ab69f61321
The expectation in the FUSB302 driver is that a TX_SUCCESS event should occur after a message has been sent, but before a GCRCSENT event is raised to indicate successful receipt of a message from the partner. However in some circumstances it is possible to see the hardware raise a GCRCSENT event before a TX_SUCCESS event is raised. The upshot of this is that the GCRCSENT handling portion of code ends up reporting the GoodCRC message to TCPM because the TX_SUCCESS event hasn't yet arrived to trigger a consumption of it. When TX_SUCCESS is then raised by the chip it ends up consuming the actual message that was meant for TCPM, and this incorrect sequence results in a hard reset from TCPM. To avoid this problem, this commit updates the message reading code to check whether a GoodCRC message was received or not. Based on this check it will either report that the previous transmission has completed or it will pass the msg data to TCPM for futher processing. This way the incorrect ordering of the events no longer matters. Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.