This is a note to let you know that I've just added the patch titled
usb: dwc3: Fix size used in dma_free_coherent()
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-dwc3-fix-size-used-in-dma_free_coherent.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 51fbc7c06c8900370c6da5fc4a4685add8fa4fb0 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date: Fri, 7 Oct 2016 22:12:39 +0200
Subject: usb: dwc3: Fix size used in dma_free_coherent()
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
commit 51fbc7c06c8900370c6da5fc4a4685add8fa4fb0 upstream.
In commit 2abd9d5fa60f9 ("usb: dwc3: ep0: Add chained TRB support"), the
size of the memory allocated with 'dma_alloc_coherent()' has been modified
but the corresponding calls to 'dma_free_coherent()' have not been updated
accordingly.
This has been spotted with coccinelle, using the following script:
////////////////////
@r@
expression x0, x1, y0, y1, z0, z1, t0, t1, ret;
@@
* ret = dma_alloc_coherent(x0, y0, z0, t0);
...
* dma_free_coherent(x1, y1, ret, t1);
@script:python@
y0 << r.y0;
y1 << r.y1;
@@
if y1.find(y0) == -1:
print "WARNING: sizes look different: '%s' vs '%s'" % (y0, y1)
////////////////////
Fixes: 2abd9d5fa60f9 ("usb: dwc3: ep0: Add chained TRB support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/gadget.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2845,7 +2845,7 @@ err3:
kfree(dwc->setup_buf);
err2:
- dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb),
+ dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2,
dwc->ep0_trb, dwc->ep0_trb_addr);
err1:
@@ -2869,7 +2869,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
kfree(dwc->setup_buf);
- dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb),
+ dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb) * 2,
dwc->ep0_trb, dwc->ep0_trb_addr);
dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
Patches currently in stable-queue which might be from christophe.jaillet@xxxxxxxxxx are
queue-4.4/usb-dwc3-fix-size-used-in-dma_free_coherent.patch
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