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 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

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-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 02a10f061a3f8bca1b37332672f50a107198adbe Mon Sep 17 00:00:00 2001

From: Peter Chen hzpeterchen@gmail.com Date: Thu, 1 Feb 2018 12:26:43 +0800 Subject: usb: host: ehci: use correct device pointer for dma ops

From: Peter Chen hzpeterchen@gmail.com

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@nxp.com Acked-by: Alan Stern stern@rowland.harvard.edu Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- 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 @@ -774,12 +774,12 @@ 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@gmail.com are

queue-4.15/usb-host-ehci-use-correct-device-pointer-for-dma-ops.patch