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usb: gadget: fsl_udc: wmb ep_td struct when submitting to controller

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Since these get allocated dmacoherent instead of noncacheable in armv7, we need
to do wmb before handing them to hardware.

Change-Id: I413eeb6da3bfeb754c4b475b19fe5823d83d3d04
Signed-off-by: Colin Cross <ccross@android.com>
Cc: Erik Gilling <konkers@android.com>
This commit is contained in:
Colin Cross
2010-03-02 17:25:41 -08:00
parent fd9c8bc964
commit 8ce033fd1f
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/gadget/fsl_udc_core.c
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@@ -670,6 +670,9 @@ static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
? (1 << (ep_index(ep) + 16))
: (1 << (ep_index(ep)));
/* Flush all the dTD structs out to memory */
wmb();
/* check if the pipe is empty */
if (!(list_empty(&ep->queue))) {
/* Add td to the end */
@@ -677,6 +680,7 @@ static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
lastreq->tail->next_td_ptr =
cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
wmb();
/* Read prime bit, if 1 goto done */
if (fsl_readl(&dr_regs->endpointprime) & bitmask)
goto out;