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SubjectRe: [PATCH] media: pci: cx18: cx18-alsa-mixer.c: Remove some unused functions
2014-12-21 1:06 GMT+01:00 Andy Walls <awalls@md.metrocast.net>:
> On December 20, 2014 5:35:17 PM EST, Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> wrote:
>>Removes some functions that are not used anywhere:
>>snd_cx18_mixer_tv_vol_get() snd_cx18_mixer_tv_vol_info()
>>snd_cx18_mixer_tv_vol_put()
>>
>>This was partially found by using a static code analysis program called
>>cppcheck.
>>
>>Signed-off-by: Rickard Strandqvist
>><rickard_strandqvist@spectrumdigital.se>
>>---
>>drivers/media/pci/cx18/cx18-alsa-mixer.c | 62
>>------------------------------
>> 1 file changed, 62 deletions(-)
>>
>>diff --git a/drivers/media/pci/cx18/cx18-alsa-mixer.c
>>b/drivers/media/pci/cx18/cx18-alsa-mixer.c
>>index 341bddc..e7b0a1f 100644
>>--- a/drivers/media/pci/cx18/cx18-alsa-mixer.c
>>+++ b/drivers/media/pci/cx18/cx18-alsa-mixer.c
>>@@ -69,68 +69,6 @@ static inline int cx18_av_vol_to_dB(int v)
>> return (v >> 9) - 119;
>> }
>>
>>-static int snd_cx18_mixer_tv_vol_info(struct snd_kcontrol *kcontrol,
>>- struct snd_ctl_elem_info *uinfo)
>>-{
>>- uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
>>- uinfo->count = 1;
>>- /* We're already translating values, just keep this control in dB */
>>- uinfo->value.integer.min = -96;
>>- uinfo->value.integer.max = 8;
>>- uinfo->value.integer.step = 1;
>>- return 0;
>>-}
>>-
>>-static int snd_cx18_mixer_tv_vol_get(struct snd_kcontrol *kctl,
>>- struct snd_ctl_elem_value *uctl)
>>-{
>>- struct snd_cx18_card *cxsc = snd_kcontrol_chip(kctl);
>>- struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
>>- struct v4l2_control vctrl;
>>- int ret;
>>-
>>- vctrl.id = V4L2_CID_AUDIO_VOLUME;
>>- vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
>>-
>>- snd_cx18_lock(cxsc);
>>- ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl);
>>- snd_cx18_unlock(cxsc);
>>-
>>- if (!ret)
>>- uctl->value.integer.value[0] = cx18_av_vol_to_dB(vctrl.value);
>>- return ret;
>>-}
>>-
>>-static int snd_cx18_mixer_tv_vol_put(struct snd_kcontrol *kctl,
>>- struct snd_ctl_elem_value *uctl)
>>-{
>>- struct snd_cx18_card *cxsc = snd_kcontrol_chip(kctl);
>>- struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
>>- struct v4l2_control vctrl;
>>- int ret;
>>-
>>- vctrl.id = V4L2_CID_AUDIO_VOLUME;
>>- vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
>>-
>>- snd_cx18_lock(cxsc);
>>-
>>- /* Fetch current state */
>>- ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl);
>>-
>>- if (ret ||
>>- (cx18_av_vol_to_dB(vctrl.value) != uctl->value.integer.value[0]))
>>{
>>-
>>- /* Set, if needed */
>>- vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
>>- ret = v4l2_subdev_call(cx->sd_av, core, s_ctrl, &vctrl);
>>- if (!ret)
>>- ret = 1; /* Indicate control was changed w/o error */
>>- }
>>- snd_cx18_unlock(cxsc);
>>-
>>- return ret;
>>-}
>>-
>>
>>/* This is a bit of overkill, the slider is already in dB internally */
>>static DECLARE_TLV_DB_SCALE(snd_cx18_mixer_tv_vol_db_scale, -9600, 100,
>>0);
>
> Really? Did you try to compile the file after this patch?
>
> http://git.linuxtv.org/cgit.cgi/media_tree.git/tree/drivers/media/pci/cx18/cx18-alsa-mixer.c#n143
>
> They are referenced later in the same file.
>
> This is only half a fix.
>
> You can either remove the cx18-alsa-mixer.* files and from the build system, or even better,you can hook-up and initialize these callbacks with alsa so alsa mixer controls show up for cx18. :)
>



Hi

Ok sorry :-(

Sure, I compile everything as allyesconfig, allmodconfig and allnoconfig.

So snd_cx18_mixer_tv_volume_info is the same as snd_cx18_mixer_tv_vol_info then.

Would gladly done something a little more concrete.
But first I want to see if as I can go through all of the
approximately 2000 functions that are not in use.


Kind regards
Rickard Strandqvist


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