snd_ac97_pcm_assign(9)

✨ snd_ac97_pcm_assign — assign AC97 slots to given PCM streams ✨

okay bestie, welcome to the Kernel API Manual entry for snd_ac97_pcm_assign(9) — yes the title AND the manual name, we're doing this properly 💅

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🌸 SYNOPSIS 🌸

int snd_ac97_pcm_assign (struct snd_ac97_bus *bus , unsigned short
       pcms_count , const struct ac97_pcm *pcms );

literally that's the whole signature, no cap. three args, one int coming back at you 🫶

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🎀 ARGUMENTS 🎀

• bus — the ac97 bus instance, aka the main character of this whole operation 👑
• pcms_count — count of PCMs to be assigned, so like, how many are we doing here 🔢
• pcms — PCMs to be assigned, the actual lineup 💖

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🦋 DESCRIPTION 🦋

so the vibe is: it assigns available AC97 slots for the given PCMs. that's the whole job, periodt ✨

but here's the part you gotta hear — if none or only some slots are available, then pcm->xxx.slots and pcm->xxx.rslots[] members are reduced and might be zero. so don't be out here assuming you got everything you asked for, ngl 🙈

lowkey important: your slot counts can shrink on you. zero is a real possibility. check before you trust it, fr fr 💀

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🌈 RETURN 🌈

• Zero if successful 🎉
• a negative error code on failure 😭

that's it, that's the return value contract, iykyk ⭐

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💜 SEE ALSO 💜

• Kernel file ./sound/pci/ac97/ac97_pcm.c 📁
• snd_ac97_set_rate(9)
• snd_ac97_pcm_open(9)
• snd_ac97_pcm_close(9)
• snd_ac97_pcm_double_rate_rules(9)

go read those next bestie, they're all friends of this one 🧚

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and that's a wrap! 💅 brought to you from ./sound/pci/ac97, dated October 2026 — mwah, see you in the next manpage 🍓🎀