dmaengine: ti: k3-udma-glue: clean up return in k3_udma_glue_rx_get_irq()

Currently the k3_udma_glue_rx_get_irq() function returns either negative
error codes or zero on error.  Generally, in the kernel, zero means
success so this be confusing and has caused bugs in the past.  Also the
"tx" version of this function only returns negative error codes.  Let's
clean this "rx" function so both functions match.

This patch has no effect on runtime.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/dma/ti/k3-udma-glue.c b/drivers/dma/ti/k3-udma-glue.c
index c9b9305..b96b448 100644 (file)
--- a/drivers/dma/ti/k3-udma-glue.c
+++ b/drivers/dma/ti/k3-udma-glue.c
@@ -1531,6 +1531,9 @@ int k3_udma_glue_rx_get_irq(struct k3_udma_glue_rx_channel *rx_chn,
                flow->virq = k3_ringacc_get_ring_irq_num(flow->ringrx);
        }
 
+       if (!flow->virq)
+               return -ENXIO;
+
        return flow->virq;
 }
 EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_irq);

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index e6f87ac..81d9f21 100644 (file)
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2424,10 +2424,10 @@ static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
 
                rx_chn->irq = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
 
-               if (rx_chn->irq <= 0) {
+               if (rx_chn->irq < 0) {
                        dev_err(dev, "Failed to get rx dma irq %d\n",
                                rx_chn->irq);
-                       ret = -ENXIO;
+                       ret = rx_chn->irq;
                        goto err;
                }
        }

diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c
index 873126d..2f716c0 100644 (file)
--- a/drivers/net/ethernet/ti/icssg/icssg_common.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_common.c
@@ -440,9 +440,7 @@ int prueth_init_rx_chns(struct prueth_emac *emac,
                        fdqring_id = k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
                                                                     i);
                ret = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
-               if (ret <= 0) {
-                       if (!ret)
-                               ret = -ENXIO;
+               if (ret < 0) {
                        netdev_err(ndev, "Failed to get rx dma irq");
                        goto fail;
                }