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Differential D49805

sound: Create a dsp_close() helper function
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Authored by christos on Apr 12 2025, 8:13 PM.
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markj
emaste
kib
dev_submerge.ch
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rG532b45fe103c: sound: Create a dsp_close() helper function
Summary

Needed by follow-up patch.

Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks

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rG FreeBSD src repository
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Event Timeline

christos created this revision.Apr 12 2025, 8:13 PM
Herald added a subscriber: imp. · View Herald TranscriptApr 12 2025, 8:13 PM
christos requested review of this revision.Apr 12 2025, 8:13 PM
Harbormaster completed remote builds in B63481: Diff 153588.Apr 12 2025, 8:13 PM
christos added a parent revision: D49804: sound: Access softc through si_drv1 in dsp cdev methods.Apr 12 2025, 8:13 PM
christos added a child revision: D49216: sound: Implement /dev/dsp as a router device.Apr 12 2025, 8:14 PM
markj accepted this revision.Apr 13 2025, 4:02 PM
This revision is now accepted and ready to land.Apr 13 2025, 4:02 PM
kib added inline comments.Apr 14 2025, 3:54 PM
sys/dev/sound/pcm/dsp.c
268

So where are these non-NULL checks in the new code?

christos added inline comments.Apr 14 2025, 3:56 PM
sys/dev/sound/pcm/dsp.c
268

At the very beginning of dsp_close_chan().

kib added inline comments.Apr 14 2025, 4:01 PM
sys/dev/sound/pcm/dsp.c
268

Are the values of priv->{rd,wr}ch stable? You are now checking for their non-NULL after priv->sc acquire.

christos added inline comments.Apr 15 2025, 5:36 PM
sys/dev/sound/pcm/dsp.c
268

Primary (i.e., non-vchan) channels are destroyed during detach (see pcm_killchans()), and vchans in dsp_close() (see vchan_destroy()). So I think it's safe to leave the check as is. If we're detaching, we'll catch that a few lines below and bail-out anyway, and for vchans, well, we destroy them here only.

kib accepted this revision.Apr 15 2025, 6:04 PM
christos marked 2 inline comments as done.Apr 15 2025, 6:06 PM
Closed by commit rG532b45fe103c: sound: Create a dsp_close() helper function (authored by christos). · Explain WhyApr 25 2025, 4:57 PM
This revision was automatically updated to reflect the committed changes.
christos added a commit: rG532b45fe103c: sound: Create a dsp_close() helper function.
christos added a reverting change: rG4a556c2277fd: Revert "sound: Create a dsp_close() helper function".Apr 25 2025, 10:04 PM

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sys/
dev/
sound/
pcm/
129 lines

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sys/dev/sound/pcm/dsp.c

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