8f6b6d0606
Because a callback is called twice when DMA transfer complete the second callback may be possible to access a freed memory if the first callback routines perform the dma_release_channel function. So this patch serialized the callback functions Signed-off-by: Brad Kim <brad.kim@semifive.com> Tested-and-reviewed-by: Green Wan <green.wan@sifive.com> Signed-off-by: Brad Kim <brad.kim@sifive.com> Link: https://lore.kernel.org/r/20200903111726.3413-1-brad.kim@sifive.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.