arc_emac_rx_stall_check(9)

📦 version 7.3.1, in nixpkgs unstable

💅 arc_emac_rx_stall_check(9) — like, the kernel API manual, bestie

okay so this is a page from the Kernel API Manual and honestly? it's giving "small function, big rescue mission." let's get into it ✨

🌸 NAME

arc_emac_rx_stall_check — the function that checks for an RX stall 🫶

🎀 SYNOPSIS

void arc_emac_rx_stall_check (struct net_device *ndev , int budget ,
unsigned int work_done );
no cap, that's the whole signature. void return, three args, we move 💅

✨ ARGUMENTS

  • ndev — a pointer to the struct net_device structure. like, the actual network device we're checking on 💖
  • budget — how many BDs are requested to process on 1 call. that's the cap for a single round, periodt.
  • work_done — how many BDs got processed. the receipts of what already happened 📋

🦋 DESCRIPTION

okay so here's the drama 😭 — under certain conditions, EMAC just stops receiving incoming packets. like, fully ghosts them. and instead of saving the data into the provided buffer, it just keeps continuously incrementing the R_MISS register. rude honestly.

this function detects that exact condition and restarts EMAC. that's it, that's the whole glow-up. it notices the vibe is off and hits the reset button so reception comes back 🔥

💜 SEE ALSO

kernel file ./drivers/net/ethernet/arc/emac_main.c — and the whole friend group of related calls:

anyway that's the page 💖 sourced from ./drivers/net/ethernet/arc, stamped October 2026, and it's literally signed arc_emac_rx_stall_check(9). go off, little net driver function 👑🌈

📦 where this page comes from