dmaengine: zxdma: Fix off-by-one for testing valid pchan request

The valid pchan range is 0 ~ d->dma_requests - 1.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/zx296702_dma.c b/drivers/dma/zx296702_dma.c
index 39915a6..c017fcd 100644 (file)
--- a/drivers/dma/zx296702_dma.c
+++ b/drivers/dma/zx296702_dma.c
@@ -739,7 +739,7 @@ static struct dma_chan *zx_of_dma_simple_xlate(struct of_phandle_args *dma_spec,
        struct dma_chan *chan;
        struct zx_dma_chan *c;
 
-       if (request > d->dma_requests)
+       if (request >= d->dma_requests)
                return NULL;
 
        chan = dma_get_any_slave_channel(&d->slave);