ARM: dw_mmc: Exclude dwmci Exynos priv_data allocation from exynos_dwmci_get_config()

This commit prevents memory leak when this function is used with DM_MMC
as the struct dwmci_exynos_priv_data is already allocated by DM.

It is necessary for NON DM aware devices to allocate this struct first.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

drivers/mmc/exynos_dw_mmc.c

@@ -146,17 +146,11 @@ static int do_dwmci_init(struct dwmci_host *host)
 }
 
 static int exynos_dwmci_get_config(const void *blob, int node,
-					struct dwmci_host *host)
+				   struct dwmci_host *host,
+				   struct dwmci_exynos_priv_data *priv)
 {
 	int err = 0;
 	u32 base, timing[3];
-	struct dwmci_exynos_priv_data *priv;
-
-	priv = malloc(sizeof(struct dwmci_exynos_priv_data));
-	if (!priv) {
-		pr_err("dwmci_exynos_priv_data malloc fail!\n");
-		return -ENOMEM;
-	}
 
 	/* Extract device id for each mmc channel */
 	host->dev_id = pinmux_decode_periph_id(blob, node);
@@ -167,7 +161,6 @@ static int exynos_dwmci_get_config(const void *blob, int node,
 
 	if (host->dev_index > 4) {
 		printf("DWMMC%d: Can't get the dev index\n", host->dev_index);
-		free(priv);
 		return -EINVAL;
 	}
 
@@ -178,7 +171,6 @@ static int exynos_dwmci_get_config(const void *blob, int node,
 	base = fdtdec_get_addr(blob, node, "reg");
 	if (!base) {
 		printf("DWMMC%d: Can't get base address\n", host->dev_index);
-		free(priv);
 		return -EINVAL;
 	}
 	host->ioaddr = (void *)base;
@@ -188,7 +180,6 @@ static int exynos_dwmci_get_config(const void *blob, int node,
 	if (err) {
 		printf("DWMMC%d: Can't get sdr-timings for devider\n",
 				host->dev_index);
-		free(priv);
 		return -EINVAL;
 	}
 
@@ -208,14 +199,13 @@ static int exynos_dwmci_get_config(const void *blob, int node,
 	host->bus_hz = fdtdec_get_int(blob, node, "bus_hz", 0);
 	host->div = fdtdec_get_int(blob, node, "div", 0);
 
-	host->priv = priv;
-
 	return 0;
 }
 
 static int exynos_dwmci_process_node(const void *blob,
 					int node_list[], int count)
 {
+	struct dwmci_exynos_priv_data *priv;
 	struct dwmci_host *host;
 	int i, node, err;
 
@@ -224,11 +214,20 @@ static int exynos_dwmci_process_node(const void *blob,
 		if (node <= 0)
 			continue;
 		host = &dwmci_host[i];
-		err = exynos_dwmci_get_config(blob, node, host);
+
+		priv = malloc(sizeof(struct dwmci_exynos_priv_data));
+		if (!priv) {
+			pr_err("dwmci_exynos_priv_data malloc fail!\n");
+			return -ENOMEM;
+		}
+
+		err = exynos_dwmci_get_config(blob, node, host, priv);
 		if (err) {
 			printf("%s: failed to decode dev %d\n", __func__, i);
+			free(priv);
 			return err;
 		}
+		host->priv = priv;
 
 		do_dwmci_init(host);
 	}
@@ -266,7 +265,8 @@ static int exynos_dwmmc_probe(struct udevice *dev)
 	struct dwmci_host *host = &priv->host;
 	int err;
 
-	err = exynos_dwmci_get_config(gd->fdt_blob, dev_of_offset(dev), host);
+	err = exynos_dwmci_get_config(gd->fdt_blob, dev_of_offset(dev), host,
+				      priv);
 	if (err)
 		return err;
 	err = do_dwmci_init(host);