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[ Upstream commit 4fdc1790e6a9ef22399c6bc6e63b80f4609f3b7e ] On plug-in of my USB-C device, its USB_SS_PORT_LS_SS_INACTIVE link state bit is set. Greping all the kernel for this bit shows that the port status requests a warm-reset this way. This just happens, if its the only device on the root hub, the hub therefore resumes and the HCDs status_urb isn't yet available. If a warm-reset request is detected, this sets the hubs event_bits, which will prevent any auto-suspend and allows the hubs workqueue to warm-reset the port later in port_event. Signed-off-by: Jan-Marek Glogowski <glogow@fbihome.de> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.