dmaengine: pl330: fix return status on pending transfers

The pl330_tx_status() function returns the desc->status if the
dma_cookie_status() call does indicate the cookie completed,
however the desc->status is not look directly compatible. Sparse
throws the following warning:

pl330.c:2262:35: warning: mixing different enum types
pl330.c:2262:35:     int enum desc_status  versus
pl330.c:2262:35:     int enum dma_status

Attempt to fix this by adding a switch statement to turn the
desc->status into a dma_status.

Note, this has only been tested with the dmatest suite.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
--
Vinod Koul <vinod.koul@intel.com>
Dan Williams <dan.j.williams@intel.com>
DMA List <dmaengine@vger.kernel.org>
Maxime Ripard <maxime.ripard@free-electrons.com>
Jassi Brar <jassisinghbrar@gmail.com>
Liviu Dudau <Liviu.Dudau@arm.com>
Linux ARM Kernel <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index d6f677e066f7..a7d9d3029b14 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2259,7 +2259,17 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
                         transferred = 0;
                 residual += desc->bytes_requested - transferred;
                 if (desc->txd.cookie == cookie) {
-                        ret = desc->status;
+                        switch (desc->status) {
+                        case DONE:
+                                ret = DMA_COMPLETE;
+                                break;
+                        case PREP:
+                        case BUSY:
+                                ret = DMA_IN_PROGRESS;
+                                break;
+                        default:
+                                WARN_ON(1);
+                        }
                         break;
                 }
                 if (desc->last)