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When stopping an AP RX channel, there can be a transient period while the channel enters STOP_IN_PROC state before reaching the final STOPPED state. In that case we make another attempt to stop the channel. Similarly, when stopping a modem channel (using a GSI generic command issued from the AP), it's possible that multiple attempts will be required before the channel reaches STOPPED state. Add a field to the GSI structure to record an errno representing the result code provided when a generic command completes. If the result learned in gsi_isr_gp_int1() is RETRY, record -EAGAIN in the result code, otherwise record 0 for success, or -EIO for any other result. If we time out nf gsi_generic_command() waiting for the command to complete, return -ETIMEDOUT (as before). Otherwise return the result stashed by gsi_isr_gp_int1(). Add a loop in gsi_modem_channel_halt() to reissue the HALT command if the result code indicates -EAGAIN. Limit this to 10 retries (after the initial attempt). Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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.