[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 <Douglas_Warzecha@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index 8ed6ddbb9c5d..4652512f7d1a 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -39,7 +39,7 @@
 #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;
@@ -581,9 +581,13 @@ static int __init dcdbas_init(void)
  */
 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);