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I always anticipated this code to be not correct, but now I had a test case to prove it. According to all documentation I have, setting the TMIO_STOP_STP bit ever only worked during block transfers. This bit is like manually enforcing an autocmd12 during a so far seamless transfer. It does NOT work when the block transfer had errors. It also does NOT work with any other cmd except block commands. For all those, CMD12 has to be treated like any other command. So, basically, we could use this bit only for mrq->data->stop cmds. But for these, we happily use the autocmd12 feature using the TMIO_STOP_SEC bit. As a result, the above bit is not useful for us and we need to treat CMD12 as a regular cmd always. Just remove the special handling code. Note that the BSP recognized this issue as well yet had a more cautious solution to the problem [1]. Which is understandable but makes CMD12 handling even more complicated. Checked with a Renesas Salvator-X/M3-W which needed to send CMD12 when retuning one of my SD cards. [1] https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git/commit/?id=2838a2ff8ca776f6d18b7fbbe75f3df8dd64183a Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Jan Klötzke <jan.kloetzke@preh.de> Tested-by: Nguyen Viet Dung <dung.nguyen.aj@renesas.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.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.