This is a note to let you know that I've just added the patch titled usb: gadget: udc: core: don't starve DMA resources to the 4.4-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-gadget-udc-core-don-t-starve-dma-resources.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 23fd537c9508fb6e3b93ddf23982f51afc087781 Mon Sep 17 00:00:00 2001 From: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Date: Wed, 24 Aug 2016 14:33:27 +0300 Subject: usb: gadget: udc: core: don't starve DMA resources From: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> commit 23fd537c9508fb6e3b93ddf23982f51afc087781 upstream. Always unmap all SG entries as required by DMA API Fixes: a698908d3b3b ("usb: gadget: add generic map/unmap request utilities") Cc: <stable@xxxxxxxxxxxxxxx> # v3.4+ Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/gadget/udc/udc-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/gadget/udc/udc-core.c +++ b/drivers/usb/gadget/udc/udc-core.c @@ -97,7 +97,7 @@ void usb_gadget_unmap_request(struct usb return; if (req->num_mapped_sgs) { - dma_unmap_sg(gadget->dev.parent, req->sg, req->num_mapped_sgs, + dma_unmap_sg(gadget->dev.parent, req->sg, req->num_sgs, is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); req->num_mapped_sgs = 0; Patches currently in stable-queue which might be from felipe.balbi@xxxxxxxxxxxxxxx are queue-4.4/usb-gadget-udc-core-don-t-starve-dma-resources.patch queue-4.4/usb-gadget-pch_udc-reorder-spin_lock-to-avoid-deadlock.patch queue-4.4/usb-gadged-pch_udc-get-rid-of-redundant-assignments.patch