On Thu, May 27, 2021 at 10:45:34AM -0500, Mario Limonciello wrote: > The XHCI controller is required to enter D3hot rather than D3cold for AMD > s2idle on this hardware generation. > > Otherwise, the 'Controller Not Ready' (CNR) bit is not being cleared by > host in resume and eventually this results in xhci resume failures during > the s2idle wakeup. > > Suggested-by: Prike Liang <Prike.Liang@xxxxxxx> > Link: https://lore.kernel.org/linux-usb/1612527609-7053-1-git-send-email-Prike.Liang@xxxxxxx/ > Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> > --- > drivers/usb/host/xhci-pci.c | 7 ++++++- > drivers/usb/host/xhci.h | 1 + > 2 files changed, 7 insertions(+), 1 deletion(-) Should it go to stable kernels, and if so, how far back? thanks, greg k-h
