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
