ALSA: control: code refactoring for TLV request handler to user element set

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User-defined element set registers own handler to get callbacks from TLV
ioctl handler. In the handler, execution path bifurcates depending on
requests from user space. At write request, container in given buffer is
registered to the element set, or replaced old TLV data. At the read
request, the registered data is copied to user space. The command request
is not allowed.  In current implementation, function of the handler
includes codes for the two cases.

This commit adds two helper functions for these cases so that readers can
easily get the above design.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Takashi Sakamoto 2017-08-03 20:20:44 +09:00 • committed by Takashi Iwai

parent 450296f305

commit 6d4d41f011

1 changed files with 46 additions and 30 deletions

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sound/core/control.c

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