[PATCH 2.6] Fix OOPS in device_platform_unregister

From: Dmitry Torokhov (dtor_core_at_ameritech.net)
Date: 07/11/04

  • Next message: Dmitry Torokhov: "[RFT] mousedev and handling absolute devices" 
    To: linux-kernel@vger.kernel.org
Date:	Sat, 10 Jul 2004 22:13:39 -0500

    Hi,

    The following patch should fix the oops reported by Denis. We can safely
    move call to device_unregister as the release fucntion is not guaranteed
    to be called immediately and therefore should not access resources anyway.
      

    -- 
Dmitry
===================================================================
ChangeSet@1.1819, 2004-07-10 22:08:01-05:00, dtor_core@ameritech.net
  Driver core: platform_device_unregister should release resources first
               and only then call device_unregister, otherwise if there
               are no more references to the device it will be freed and
               the fucntion will try to access freed memory.
  
  Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
              
 platform.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
===================================================================
diff -Nru a/drivers/base/platform.c b/drivers/base/platform.c
--- a/drivers/base/platform.c	2004-07-10 22:09:10 -05:00
+++ b/drivers/base/platform.c	2004-07-10 22:09:10 -05:00
@@ -146,13 +146,13 @@
 	int i;
 
 	if (pdev) {
-		device_unregister(&pdev->dev);
-
 		for (i = 0; i < pdev->num_resources; i++) {
 			struct resource *r = &pdev->resource[i];
 			if (r->flags & (IORESOURCE_MEM|IORESOURCE_IO))
 				release_resource(r);
 		}
+
+		device_unregister(&pdev->dev);
 	}
 }
 
-
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  • Next message: Dmitry Torokhov: "[RFT] mousedev and handling absolute devices"