[PATCH] net: stmmac: Allow zero for [tr]x_fifo_size

[Steven Price]

Commit 8865d22656b4 ("net: stmmac: Specify hardware capability value
when FIFO size isn't specified") modified the behaviour to bail out if
both the FIFO size and the hardware capability were both set to zero.
However there are platforms out there (e.g. RK3288) where this is the
case which this breaks.

Remove the error return and use the dma_cap value as is.

Fixes: 8865d22656b4 ("net: stmmac: Specify hardware capability value when FIFO size isn't specified")
Signed-off-by: Steven Price <steven.price@xxxxxxx>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index d04543e5697b..41c837c91811 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7220,12 +7220,7 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
 	}
 
 	if (!priv->plat->rx_fifo_size) {
-		if (priv->dma_cap.rx_fifo_size) {
-			priv->plat->rx_fifo_size = priv->dma_cap.rx_fifo_size;
-		} else {
-			dev_err(priv->device, "Can't specify Rx FIFO size\n");
-			return -ENODEV;
-		}
+		priv->plat->rx_fifo_size = priv->dma_cap.rx_fifo_size;
 	} else if (priv->dma_cap.rx_fifo_size &&
 		   priv->plat->rx_fifo_size > priv->dma_cap.rx_fifo_size) {
 		dev_warn(priv->device,
@@ -7234,12 +7229,7 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
 		priv->plat->rx_fifo_size = priv->dma_cap.rx_fifo_size;
 	}
 	if (!priv->plat->tx_fifo_size) {
-		if (priv->dma_cap.tx_fifo_size) {
-			priv->plat->tx_fifo_size = priv->dma_cap.tx_fifo_size;
-		} else {
-			dev_err(priv->device, "Can't specify Tx FIFO size\n");
-			return -ENODEV;
-		}
+		priv->plat->tx_fifo_size = priv->dma_cap.tx_fifo_size;
 	} else if (priv->dma_cap.tx_fifo_size &&
 		   priv->plat->tx_fifo_size > priv->dma_cap.tx_fifo_size) {
 		dev_warn(priv->device,
-- 
2.39.5