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06891af270Merge series from Nam Cao <namcao@linutronix.de>: While running the spl022, I got the following warning: BUG: sleeping function called from invalid context at drivers/spi/spi.c:1428 This is because between spi transfers, spi_transfer_delay_exec() (who may sleep if the delay is >10us) is called in interrupt context. This is a problem for anyone who runs this driver and need more than 10us delay. Patch 1 adds an error reporting mechanism, needed by patch 2 who switch to use the default spi_transfer_one_message(), which fix the problem. The series is tested with polling transfer mode and interrupt transfer mode. I can't test the DMA mode, so some help testing here is very appreciated. |
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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.