The patch titled
usb: fsl_qe_udc: Fix muram corruption by disabled endpoints
has been added to the -mm tree. Its filename is
usb-fsl_qe_udc-fix-muram-corruption-by-disabled-endpoints.patch
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------------------------------------------------------
Subject: usb: fsl_qe_udc: Fix muram corruption by disabled endpoints
From: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Before freeing an endpoint's muram memory, we should stop all activity of
the endpoint, otherwise the QE UDC controller might do nasty things with
the muram memory that isn't belong to that endpoint anymore.
The qe_ep_reset() effectively flushes the hardware fifos, finishes all
late transaction and thus prevents the corruption.
Signed-off-by: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Acked-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/fsl_qe_udc.c | 1 +
1 file changed, 1 insertion(+)
diff -puN drivers/usb/gadget/fsl_qe_udc.c~usb-fsl_qe_udc-fix-muram-corruption-by-disabled-endpoints drivers/usb/gadget/fsl_qe_udc.c
--- a/drivers/usb/gadget/fsl_qe_udc.c~usb-fsl_qe_udc-fix-muram-corruption-by-disabled-endpoints
+++ a/drivers/usb/gadget/fsl_qe_udc.c
@@ -1622,6 +1622,7 @@ static int qe_ep_disable(struct usb_ep *
nuke(ep, -ESHUTDOWN);
ep->desc = NULL;
ep->stopped = 1;
+ qe_ep_reset(udc, ep->epnum);
spin_unlock_irqrestore(&udc->lock, flags);
cpm_muram_free(cpm_muram_offset(ep->rxbase));
_
Patches currently in -mm which might be from avorontsov@xxxxxxxxxxxxx are
origin.patch
linux-next.patch
usb-driver-for-freescale-quicc-engine-usb-host-controller.patch
usb-fsl_qe_udc-fix-oops-on-qe-udc-probe-failure.patch
usb-fsl_qe_udc-fix-recursive-locking-bug-in-ch9getstatus.patch
usb-fsl_qe_udc-fix-qe-usb-controller-initialization.patch
usb-fsl_qe_udc-fix-disconnects-reporting-during-bus-reset.patch
usb-fsl_qe_udc-fix-muram-corruption-by-disabled-endpoints.patch
usb-fsl_qe_udc-fix-stalled-tx-requests-bug.patch
rtc-bunch-of-drivers-fix-no-irq-case-handing.patch
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