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Driver SDIO code uses helper functions to do IO to the SDIO device. Current helpers handle IO of a single byte as well as multi-byte. Driver predominately uses single byte IO. If the common case is made simple it simplifies the whole driver. The common case can be made simple by splitting the multi-byte and single byte calls into separate functions, i.e 4 functions in total, read single byte, read multi-byte, write single byte, write multi-byte. Also, we need to handle the debug code. Currently debug calls after read/write fail access the IO buffer. This buffer, at best, does not hold useful data on the error path, at worst is uninitialized and holds garbage. Split read/write helper functions into two functions each, one for single byte IO and one for multi-byte IO. Fix all call sites. Do not change the program logic. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.