RE: [PATCH 6/9] dmaengine: consolidate tx_status functions
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From: H Hartley Sweeten <hidden>
Date: 2012-03-05 23:35:53
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linux-arm-kernel
Revision v1 of 6 in this series.
Revisions (6)
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On Monday, March 05, 2012 1:17 PM, Russell King wrote:
Now that we have the completed cookie in the dma_chan structure, we can consolidate the tx_status functions by providing a function to set the txstate structure and returning the DMA status. We also provide a separate helper to set the residue for cookies which are still in progress. Signed-off-by: Russell King <redacted>
<snip>
quoted hunk ↗ jump to hunk
diff --git a/drivers/dma/dmaengine.h b/drivers/dma/dmaengine.h index 47e0997..244a2c5 100644 --- a/drivers/dma/dmaengine.h +++ b/drivers/dma/dmaengine.h@@ -45,4 +45,35 @@ static inline void dma_cookie_complete(struct dma_asyn=
c_tx_descriptor *tx)
tx->cookie =3D 0;
}
=20
+/**
+ * dma_cookie_status - report cookie status
+ * @chan: dma channel
+ * @cookie: cookie we are interested in
+ * @state: dma_tx_state structure to return last/used cookies
+ *
+ * Report the status of the cookie, filling in the state structure if
+ * non-NULL. No locking is required.
+ */
+static inline enum dma_status dma_cookie_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *state)
+{
+ dma_cookie_t used, complete;
+
+ used =3D chan->cookie;
+ complete =3D chan->complete;Is this supposed to be: complete =3D chan->completed_cookie; Regards, Hartley