[PATCH] dcdbas: dcdbas_pdev referenced after platform_device_unregister on exit

smi_data_buf_free() references dcdbas_pdev when calling
dma_free_coherent(). In dcdbas_exit(), smi_data_buf_free() is called after
platform_device_unregister(dcdbas_pdev).

This patch moves platform_device_unregister(dcdbas_pdev) after
smi_data_buf_free() in dcdbas_exit().

Signed-off-by: Doug Warzecha <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/firmware/dcdbas.c

···
 #include "dcdbas.h"
 
 #define DRIVER_NAME		"dcdbas"
-#define DRIVER_VERSION		"5.6.0-1"
+#define DRIVER_VERSION		"5.6.0-2"
 #define DRIVER_DESCRIPTION	"Dell Systems Management Base Driver"
 
 static struct platform_device *dcdbas_pdev;
···
  */
 static void __exit dcdbas_exit(void)
 {
-	platform_device_unregister(dcdbas_pdev);
+	/*
+	 * make sure functions that use dcdbas_pdev are called
+	 * before platform_device_unregister
+	 */
 	unregister_reboot_notifier(&dcdbas_reboot_nb);
 	smi_data_buf_free();
+	platform_device_unregister(dcdbas_pdev);
 }
 
 module_init(dcdbas_init);