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commit 21e35e898aa9ef7781632959db8613a5380f2eae upstream. For data read commands, SDHC may initiate data transfers even before it completely process the command response. In case command itself fails, driver un-maps the memory associated with data transfer but this memory can still be accessed by SDHC for the already initiated data transfer. This scenario can lead to un-mapped memory access error. To avoid this scenario, reset SDHC (when command fails) prior to un-mapping memory. Resetting SDHC ensures that all in-flight data transfers are either aborted or completed. So we don't run into this scenario. Swap the reset, un-map steps sequence in sdhci_request_done(). Suggested-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org> Signed-off-by: Pradeep P V K <pragalla@codeaurora.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/1614760331-43499-1-git-send-email-pragalla@qti.qualcomm.com Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.