Merge branch 'linux-4.21' of git://github.com/skeggsb/linux into drm-fixes

[sfrench/cifs-2.6.git] / Documentation / driver-model / devres.txt

diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 52a752300e9447ecf395e271bbf57b805c23df03..b277cafce71eb25effa455c90f3c24d14430856d 100644 (file)
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -132,6 +132,13 @@ devres.  Complexity is shifted from less maintained low level drivers
 to better maintained higher layer.  Also, as init failure path is
 shared with exit path, both can get more testing.
 
+Note though that when converting current calls or assignments to
+managed devm_* versions it is up to you to check if internal operations
+like allocating memory, have failed. Managed resources pertains to the
+freeing of these resources *only* - all other checks needed are still
+on you. In some cases this may mean introducing checks that were not
+necessary before moving to the managed devm_* calls.
+
 
   3. Devres group
   ---------------
@@ -243,7 +250,6 @@ DMA
   dmaenginem_async_device_register()
   dmam_alloc_coherent()
   dmam_alloc_attrs()
-  dmam_declare_coherent_memory()
   dmam_free_coherent()
   dmam_pool_create()
   dmam_pool_destroy()