[PATCH net-next v3] stmmac: dwmac-intel-plat: remove redundant dwmac->data check in probe

[PATCH net-next v3] stmmac: dwmac-intel-plat: remove redundant dwmac->data check in probe

[Vitalii Mordan]

The driver’s compatibility with devices is confirmed earlier in
platform_match(). Since reaching probe means the device is valid,
the extra check can be removed to simplify the code.

Signed-off-by: Vitalii Mordan <mordan@ispras.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
v2: Add a comment explaining why dwmac->data cannot be NULL, as per
Andrew Lunn's request.
v3: Resolve merge conflicts.
 .../stmicro/stmmac/dwmac-intel-plat.c         | 53 ++++++++++---------
 1 file changed, 28 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c
index a433526dcbe8..d94f0a150e93 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c
@@ -97,35 +97,38 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
 	dwmac->dev = &pdev->dev;
 	dwmac->tx_clk = NULL;
 
+	/*
+	 * This cannot return NULL at this point because the driver’s
+	 * compatibility with the device has already been validated in
+	 * platform_match().
+	 */
 	dwmac->data = device_get_match_data(&pdev->dev);
-	if (dwmac->data) {
-		if (dwmac->data->fix_mac_speed)
-			plat_dat->fix_mac_speed = dwmac->data->fix_mac_speed;
-
-		/* Enable TX clock */
-		if (dwmac->data->tx_clk_en) {
-			dwmac->tx_clk = devm_clk_get(&pdev->dev, "tx_clk");
-			if (IS_ERR(dwmac->tx_clk))
-				return PTR_ERR(dwmac->tx_clk);
+	if (dwmac->data->fix_mac_speed)
+		plat_dat->fix_mac_speed = dwmac->data->fix_mac_speed;
+
+	/* Enable TX clock */
+	if (dwmac->data->tx_clk_en) {
+		dwmac->tx_clk = devm_clk_get(&pdev->dev, "tx_clk");
+		if (IS_ERR(dwmac->tx_clk))
+			return PTR_ERR(dwmac->tx_clk);
+
+		ret = clk_prepare_enable(dwmac->tx_clk);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"Failed to enable tx_clk\n");
+			return ret;
+		}
 
-			ret = clk_prepare_enable(dwmac->tx_clk);
+		/* Check and configure TX clock rate */
+		rate = clk_get_rate(dwmac->tx_clk);
+		if (dwmac->data->tx_clk_rate &&
+		    rate != dwmac->data->tx_clk_rate) {
+			rate = dwmac->data->tx_clk_rate;
+			ret = clk_set_rate(dwmac->tx_clk, rate);
 			if (ret) {
 				dev_err(&pdev->dev,
-					"Failed to enable tx_clk\n");
-				return ret;
-			}
-
-			/* Check and configure TX clock rate */
-			rate = clk_get_rate(dwmac->tx_clk);
-			if (dwmac->data->tx_clk_rate &&
-			    rate != dwmac->data->tx_clk_rate) {
-				rate = dwmac->data->tx_clk_rate;
-				ret = clk_set_rate(dwmac->tx_clk, rate);
-				if (ret) {
-					dev_err(&pdev->dev,
-						"Failed to set tx_clk\n");
-					goto err_tx_clk_disable;
-				}
+					"Failed to set tx_clk\n");
+				goto err_tx_clk_disable;
 			}
 		}
 
-- 
2.25.1

Re: [PATCH net-next v3] stmmac: dwmac-intel-plat: remove redundant dwmac->data check in probe

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 15 Nov 2024 16:26:32 +0300 you wrote:
> The driver’s compatibility with devices is confirmed earlier in
> platform_match(). Since reaching probe means the device is valid,
> the extra check can be removed to simplify the code.
> 
> Signed-off-by: Vitalii Mordan <mordan@ispras.ru>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> 
> [...]

Here is the summary with links:
  - [net-next,v3] stmmac: dwmac-intel-plat: remove redundant dwmac->data check in probe
    https://git.kernel.org/netdev/net-next/c/cc84d89ad8d4

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html