dma: pl08x: allow zero slave channels

linusw · Vinod Koul · commit 1080411c6bf9 · 2013-12-18T21:58:30.000+05:30
It might happen that a platform wants to use its DMA engine for
memcpy only, and then we have zero slave channels to initialize,
so allow the slave initialization to return zero.

Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Signed-off-by: Vinod Koul &lt;vinod.koul@intel.com&gt;
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
@@ -2167,7 +2167,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 	/* Register slave channels */
 	ret = pl08x_dma_init_virtual_channels(pl08x, &pl08x->slave,
 			pl08x->pd->num_slave_channels, true);
-	if (ret <= 0) {
+	if (ret < 0) {
 		dev_warn(&pl08x->adev->dev,
 			"%s failed to enumerate slave channels - %d\n",
 				__func__, ret);
