usb: musb: dsps: fix res_name length

The res_name is used for the name construction of a DT property as
follows:

  sprintf(res_name, "port%d-mode", id);

Hence, res_name must be at least 11 characters long in order to store
the name including the terminating '\0'.

While at it, use to snprintf() rather than sprintf() when accessing this
buffer.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_dsps.c

@@ -458,11 +458,11 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
 	struct platform_device	*musb;
 	struct resource *res;
 	struct resource	resources[2];
-	char res_name[10];
+	char res_name[11];
 	int ret, musbid;
 
 	/* get memory resource */
-	sprintf(res_name, "musb%d", id);
+	snprintf(res_name, sizeof(res_name), "musb%d", id);
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name);
 	if (!res) {
 		dev_err(dev, "%s get mem resource failed\n", res_name);
@@ -473,7 +473,7 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
 	resources[0] = *res;
 
 	/* get irq resource */
-	sprintf(res_name, "musb%d-irq", id);
+	snprintf(res_name, sizeof(res_name), "musb%d-irq", id);
 	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res_name);
 	if (!res) {
 		dev_err(dev, "%s get irq resource failed\n", res_name);
@@ -530,7 +530,7 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
 
 		of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
 		of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
-		sprintf(res_name, "port%d-mode", id);
+		snprintf(res_name, sizeof(res_name), "port%d-mode", id);
 		of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
 		of_property_read_u32(np, "power", (u32 *)&pdata->power);
 		config->multipoint = of_property_read_bool(np, "multipoint");