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If any key on console is pressed when board is suspended, board hangs. Driver's interrupt handler must be guaranteed not to run while resume/suspend_noirq() are being executed. See include/linux/pm.h for details. Tested on i.MX6 based board. The idea of this fix is based on commit in official i.MX kernel tree: http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git commit 81e8e7d91d81 ("tty: serial: imx: disable irq after suspend") Disable rx irq after suspend to avoid interrupt coming in early resume. Signed-off-by: Fugang Duan <B38611@freescale.com> Signed-off-by: Maxim Yu. Osipov <mosipov@ilbers.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.