zd_mac_tx_to_dev(9)

📦 version 7.3.1, in nixpkgs unstable

💅 zd_mac_tx_to_dev(9) — the Kernel API Manual, bestie edition 🎀

okay so this is page zd_mac_tx_to_dev(9) from the Kernel API Manual (section 9, kernel developer vibes only, no cap) and it's genuinely such a little icon. it's a callback. it's tiny. it ate. let's get into it 🦋

✨ NAME ✨

zd_mac_tx_to_dev — callback for USB layer 🫶

like, that's the whole job description. it's the USB layer's little callback bestie. main character energy fr.

🌸 SYNOPSIS 🌸

void zd_mac_tx_to_dev (struct sk_buff *skb , int error );

yup that's it, that's the whole signature 💀 returns void, takes a struct sk_buff *skb and an int error, and then just goes off to do its thing. iconic behaviour honestly.

🎀 ARGUMENTS 🎀

  • skb — a sk_buff pointer 💖 your literal packet bestie, the frame in question.
  • error — the error value, and it's 0 if the transmission was successful ✨ so like, zero equals slay in this context, keep that in mind.

👑 DESCRIPTION 👑

so what it actually does: it informs the MAC layer that the frame has successfully transferred to the device 🔥 that's the whole plot.

and then, plot twist 🌈 — if an ACK is required and the transfer to the device has been successful, the packets get put on the ack_wait_queue with the control set removed. the way that ack_wait_queue is just sitting there waiting for its moment... obsessed 💜

lowkey important detail to not fumble: the ACK branch only happens when an ACK is required and the transfer succeeded. both conditions. periodt ✋

🦋 SEE ALSO 🦋

like a little friend group of kernel symbols, all linked up, iykyk 💫

so yeah that's the page!! source is ./drivers/net/wireless/zydas/z... (yes it's cut off with the little ..., that's how it came, don't come for me 🙈), dated October 2026, and the page is zd_mac_tx_to_dev(9) — same as the top, we love a full circle moment 💖 bye bestie, go inform that MAC layer 🧚✨

📦 where this page comes from