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[ Upstream commit 8520ce1e17799b220ff421d4f39438c9c572ade3 ] The IRQ handler, mmci_irq(), loops until all status bits have been cleared. However, the status bit signaling busy in variant->busy_detect_flag, may be set even if busy detection isn't monitored for the current request. This may be the case for the CMD11 when switching the I/O voltage, which leads to that mmci_irq() busy loops in IRQ context. Fix this problem, by clearing the status bit for busy, before continuing to validate the condition for the loop. This is safe, because the busy status detection has already been taken care of by mmci_cmd_irq(). Signed-off-by: Ludovic Barre <ludovic.barre@st.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.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.