xcan_set_error_state(9)

✨ xcan_set_error_state ✨ (kernel API manual, section 9)

okay so bestie, we're in the kernel API manual (section 9) and this little icon is called xcan_set_error_state — say it with me, it's giving "let me just quietly fix the vibe of this CAN device" 💅

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🌸 SYNOPSIS 🌸

void xcan_set_error_state (struct net_device *ndev , enum can_state
new_state , struct can_frame *cf );

like, it returns nothing (void) and it takes three things. that's it. that's the whole entrance exam 🎀

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💖 ARGUMENTS 💖

• ndev — a pointer to the net_device structure. your actual device, your main character 🫶
• new_state — the new CAN state to be set. it's an enum can_state, so like, pick a state, any state ✨
• cf — the error frame to be populated, or NULL. yes queen, NULL is allowed, it's optional and we respect that 🙈

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🦋 DESCRIPTION 🦋

so what does it actually do? it sets a new CAN error state for the device. while it's at it, it also updates the statistics and populates the error frame — but only if you actually gave it one (cf). no frame, no populating. simple as that 💀

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⭐ SEE ALSO ⭐

literally the whole friend group, no cap. if you're gonna hang out with xcan_set_error_state, you're gonna meet all of these:

• the kernel file ./drivers/net/can/xilinx_can.c and struct xcan_priv(9)
• xcan_write_reg_le(9)
• xcan_read_reg_le(9)
• xcan_write_reg_be(9)
• xcan_read_reg_be(9)
• xcan_rx_int_mask(9)
• set_reset_mode(9)
• xcan_set_bittiming(9)
• xcan_chip_start(9)
• xcan_do_set_mode(9)
• xcan_write_frame(9)
• xcan_start_xmit_fifo(9)
• xcan_start_xmit_mailbox(9)
• xcan_start_xmit(9)
• xcan_rx(9)
• xcanfd_rx(9)
• xcan_current_error_state(9)
• xcan_update_error_state_after_rxtx(9)
• xcan_err_interrupt(9)
• xcan_state_interrupt(9)
• xcan_rx_fifo_get_next_frame(9)
• xcan_rx_poll(9)
• xcan_tx_interrupt(9)
• xcan_interrupt(9)
• xcan_chip_stop(9)
• xcan_open(9)
• xcan_close(9)
• xcan_get_berr_counter(9)
• xcan_get_auto_tdcv(9)
• xcan_suspend(9)
• xcan_resume(9)
• xcan_runtime_suspend(9)
• xcan_runtime_resume(9)
• xcan_probe(9)
• xcan_remove(9)

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and that's the whole page, bestie 🧚 no notes, ate and left no crumbs 👑

k byeee, this one lives in ./drivers/net/can and it's dated October 2026 — so like, it's from the future, iconic behavior honestly 🌈💜