[PATCH RFC 1/3] dt:net:stmmac: Allocate platform data only if its NULL.

[Srinivas KANDAGATLA]

From: Srinivas Kandagatla <srinivas.kandagatla at st.com>

In some DT use-cases platform data might be already allocated and passed
via AUXDATA. These are the cases where machine level code populates few
callbacks in the platform data.

This patch adds check and reuses platform_data if its valid, before
allocating a new one.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla at st.com>
---
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 1d3780f..5907920 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -92,8 +92,10 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
 	if (IS_ERR(addr))
 		return PTR_ERR(addr);
 
+	plat_dat = pdev->dev.platform_data;
 	if (pdev->dev.of_node) {
-		plat_dat = devm_kzalloc(&pdev->dev,
+		if (!plat_dat)
+			plat_dat = devm_kzalloc(&pdev->dev,
 					sizeof(struct plat_stmmacenet_data),
 					GFP_KERNEL);
 		if (!plat_dat) {
@@ -106,8 +108,6 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
 			pr_err("%s: main dt probe failed", __func__);
 			return ret;
 		}
-	} else {
-		plat_dat = pdev->dev.platform_data;
 	}
 
 	/* Custom initialisation (if needed)*/
-- 
1.7.6.5