diff options
Diffstat (limited to 'Documentation/sound')
-rw-r--r-- | Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl | 17 |
1 files changed, 1 insertions, 16 deletions
diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl index ab3dfe074fb1..05ae29ac898c 100644 --- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl | |||
@@ -1433,25 +1433,10 @@ | |||
1433 | <informalexample> | 1433 | <informalexample> |
1434 | <programlisting> | 1434 | <programlisting> |
1435 | <![CDATA[ | 1435 | <![CDATA[ |
1436 | if (chip->res_port) { | 1436 | release_and_free_resource(chip->res_port); |
1437 | release_resource(chip->res_port); | ||
1438 | kfree_nocheck(chip->res_port); | ||
1439 | } | ||
1440 | ]]> | 1437 | ]]> |
1441 | </programlisting> | 1438 | </programlisting> |
1442 | </informalexample> | 1439 | </informalexample> |
1443 | |||
1444 | As you can see, the resource pointer is also to be freed | ||
1445 | via <function>kfree_nocheck()</function> after | ||
1446 | <function>release_resource()</function> is called. You | ||
1447 | cannot use <function>kfree()</function> here, because on ALSA, | ||
1448 | <function>kfree()</function> may be a wrapper to its own | ||
1449 | allocator with the memory debugging. Since the resource pointer | ||
1450 | is allocated externally outside the ALSA, it must be released | ||
1451 | via the native | ||
1452 | <function>kfree()</function>. | ||
1453 | <function>kfree_nocheck()</function> is used for that; it calls | ||
1454 | the native <function>kfree()</function> without wrapper. | ||
1455 | </para> | 1440 | </para> |
1456 | 1441 | ||
1457 | <para> | 1442 | <para> |