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The mipi_csis_dump_regs() function accesses the interface registers in order to printout their values for debug purposes. As the function access the registers, it requires the interface to be powered up. Currently this is only enforced in one of the function's callers (mipi_csis_log_status)() but not when the function is called by the debugfs attribute handler. Make sure to access registers only if the interface is powered up and remove the same check from the caller. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Acked-by: Rui Miguel Silva <rmfrfs@gmail.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@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.