es58x_is_can_state_active(9)

📦 version 7.3.1, in nixpkgs unstable

💅 es58x_is_can_state_active 💅

okay bestie, welcome to the <cyan>Kernel API Manual</cyan> page for es58x_is_can_state_active — yes that's a mouthful, we love her anyway 🫶

✨ NAME ✨

es58x_is_can_state_active — literally just asking: is this network device in an active CAN state? that's the whole vibe check 🔥

🌸 SYNOPSIS 🌸

bool es58x_is_can_state_active (struct net_device *netdev );

🎀 ARGUMENTS 🎀

  • netdev — the CAN network device. that's it, that's the whole argument, she's low maintenance 💅

👑 DESCRIPTION 👑

so the device counts as active if it can actually send or receive CAN frames — like, if it's in any one of these states:

  • CAN_STATE_ERROR_ACTIVE
  • CAN_STATE_ERROR_WARNING
  • CAN_STATE_ERROR_PASSIVE

those three, and only those three. iykyk ✨

💀 Caution, fr fr: when recovering from a bus-off, net/core/dev.c#can_restart will call net/core/dev.c#can_flush_echo_skb without using any kind of locks. so it is critical to guarantee that no TX or echo operations (i.e. any access to priv->echo_skb[]) can be done while this function is returning false. like. do not do that. not even a little. 😭

⭐ RETURN ⭐

returns true if the device is active, else returns false. iconic behaviour, no notes 🎀

🦋 SEE ALSO 🦋

kernel file: ./drivers/net/can/usb/etas_es58x/es58x_core.c

and the whole bestie squad:

and that's the page!! 🧚 this lil beauty lives in ./drivers/net/can/usb/etas_es58x, dated October 2026, and yes she's still shipping as es58x_is_can_state_active(9). mwah 💖 periodt.

📦 where this page comes from