intel-mid: sfi: Allow struct devs_id.get_platform_data to be NULL

Intel mid sfi code doesn't need struct devs_id.get_platform_data != NULL.
If the callback is not set, just assume there is no platform_data.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1382049336-21316-11-git-send-email-david.a.cohen@linux.intel.com
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/platform/intel-mid/sfi.c

@@ -70,6 +70,9 @@ struct blocking_notifier_head intel_scu_notifier =
 			BLOCKING_NOTIFIER_INIT(intel_scu_notifier);
 EXPORT_SYMBOL_GPL(intel_scu_notifier);
 
+#define intel_mid_sfi_get_pdata(dev, priv)	\
+	((dev)->get_platform_data ? (dev)->get_platform_data(priv) : NULL)
+
 /* parse all the mtimer info to a static mtimer array */
 int __init sfi_parse_mtmr(struct sfi_table_header *table)
 {
@@ -334,7 +337,7 @@ static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *pentry,
 
 	pr_debug("IPC bus, name = %16.16s, irq = 0x%2x\n",
 		pentry->name, pentry->irq);
-	pdata = dev->get_platform_data(pentry);
+	pdata = intel_mid_sfi_get_pdata(dev, pentry);
 
 	pdev = platform_device_alloc(pentry->name, 0);
 	if (pdev == NULL) {
@@ -367,7 +370,7 @@ static void __init sfi_handle_spi_dev(struct sfi_device_table_entry *pentry,
 		spi_info.max_speed_hz,
 		spi_info.chip_select);
 
-	pdata = dev->get_platform_data(&spi_info);
+	pdata = intel_mid_sfi_get_pdata(dev, &spi_info);
 
 	spi_info.platform_data = pdata;
 	if (dev->delay)
@@ -391,7 +394,7 @@ static void __init sfi_handle_i2c_dev(struct sfi_device_table_entry *pentry,
 		i2c_info.type,
 		i2c_info.irq,
 		i2c_info.addr);
-	pdata = dev->get_platform_data(&i2c_info);
+	pdata = intel_mid_sfi_get_pdata(dev, &i2c_info);
 	i2c_info.platform_data = pdata;
 
 	if (dev->delay)
@@ -450,7 +453,7 @@ static int __init sfi_parse_devs(struct sfi_table_header *table)
 
 		dev = get_device_id(pentry->type, pentry->name);
 
-		if ((dev == NULL) || (dev->get_platform_data == NULL))
+		if (!dev)
 			continue;
 
 		if (dev->device_handler) {