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Robert Mader
410f8e562e
commit1d0e25c1ddupstream. The message of commit504e2b4ab9("dma-buf/udmabuf: skip redundant cpu sync to fix cacheline EEXIST warning") says: > The CPU sync at map/unmap time is also redundant for udmabuf: > begin_cpu_udmabuf() and end_cpu_udmabuf() already perform explicit > cache synchronization via dma_sync_sgtable_for_cpu/device() when CPU > access is requested through the dma-buf interface. This, however, does not apply to the first time begin_cpu_udmabuf() is called on an udmabuf, in which case the implementation previously relied on get_sg_table() to perform the cache synchronisation. Ensure to call dma_sync_sgtable_for_cpu() in that case as well. Fixes:504e2b4ab9("dma-buf/udmabuf: skip redundant cpu sync to fix cacheline EEXIST warning") Signed-off-by: Robert Mader <robert.mader@collabora.com> Reviewed-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Link: https://patch.msgid.link/20260627105725.9083-1-robert.mader@collabora.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.