This is a note to let you know that I've just added the patch titled usb: host: ehci: use correct device pointer for dma ops to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-host-ehci-use-correct-device-pointer-for-dma-ops.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 02a10f061a3f8bca1b37332672f50a107198adbe Mon Sep 17 00:00:00 2001 From: Peter Chen <hzpeterchen@xxxxxxxxx> Date: Thu, 1 Feb 2018 12:26:43 +0800 Subject: usb: host: ehci: use correct device pointer for dma ops From: Peter Chen <hzpeterchen@xxxxxxxxx> commit 02a10f061a3f8bca1b37332672f50a107198adbe upstream. commit a8c06e407ef9 ("usb: separate out sysdev pointer from usb_bus") converted to use hcd->self.sysdev for DMA operations instead of hcd->self.controller, but forgot to do it for hcd test mode. Replace the correct one in this commit. Fixes: a8c06e407ef9 ("usb: separate out sysdev pointer from usb_bus") Signed-off-by: Peter Chen <peter.chen@xxxxxxx> Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/host/ehci-hub.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -787,12 +787,12 @@ static struct urb *request_single_step_s atomic_inc(&urb->use_count); atomic_inc(&urb->dev->urbnum); urb->setup_dma = dma_map_single( - hcd->self.controller, + hcd->self.sysdev, urb->setup_packet, sizeof(struct usb_ctrlrequest), DMA_TO_DEVICE); urb->transfer_dma = dma_map_single( - hcd->self.controller, + hcd->self.sysdev, urb->transfer_buffer, urb->transfer_buffer_length, DMA_FROM_DEVICE); Patches currently in stable-queue which might be from hzpeterchen@xxxxxxxxx are queue-4.14/usb-host-ehci-use-correct-device-pointer-for-dma-ops.patch