Commit 82341b36 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Greg Kroah-Hartman

USB: fsl_qe_udc: Fix muram corruption by disabled endpoints

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: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent ef84e405
...@@ -1622,6 +1622,7 @@ static int qe_ep_disable(struct usb_ep *_ep) ...@@ -1622,6 +1622,7 @@ static int qe_ep_disable(struct usb_ep *_ep)
nuke(ep, -ESHUTDOWN); nuke(ep, -ESHUTDOWN);
ep->desc = NULL; ep->desc = NULL;
ep->stopped = 1; ep->stopped = 1;
qe_ep_reset(udc, ep->epnum);
spin_unlock_irqrestore(&udc->lock, flags); spin_unlock_irqrestore(&udc->lock, flags);
cpm_muram_free(cpm_muram_offset(ep->rxbase)); cpm_muram_free(cpm_muram_offset(ep->rxbase));
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment