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The driver triggers actions on both edges of the vbus signal. The former PIO controller was triggering IRQs on both falling and rising edges by default. Newer PIO controller don't, so it's better to set it explicitly to IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING. Without this patch we may trigger the connection with host but only on some bouncing signal conditions and thus lose connecting events. Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: stable <stable@vger.kernel.org> # v4.4+ Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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.