ALSA: control: Simplify snd_ctl_elem_list() implementation

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This patch simplifies the code of snd_ctl_elem_list() in the following
ways:

- Avoid a vmalloc() temporary buffer but do copy in each iteration;
  the vmalloc buffer was introduced at the time we took the spinlock
  for the ctl element management.

- Use the standard list_for_each_entry() macro

- Merge two loops into one;
  it used to be a loop for skipping until offset becomes zero and
  another loop to copy the data.  They can be folded into a single
  loop easily.

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

...

This commit is contained in:

Takashi Iwai 2017-05-22 17:43:04 +02:00

parent a02cb8f8de

commit 53e7bf4525

1 changed files with 24 additions and 42 deletions

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68

sound/core/control.c

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