rt2x00usb_regbusy_read(9)

💅 rt2x00usb_regbusy_read — kernel API manual, but make it cute ✨

okay so bestie, this is a page from the Kernel API Manual and it's about rt2x00usb_regbusy_read, which lowkey does exactly what it says on the tin: reads a register and checks if it's busy. no cap. 🎀

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✨ NAME ✨

rt2x00usb_regbusy_read — Read from register with busy check 🦋

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🌸 SYNOPSIS 🌸

int rt2x00usb_regbusy_read (struct rt2x00_dev *rt2x00dev , const
       unsigned int offset , const struct rt2x00_field32 field , u32 *reg );

like, that's the whole signature, copy it exactly bestie 💖

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💜 ARGUMENTS 💜

• rt2x00dev — the device pointer, iykyk — see struct rt2x00_dev. 🫶
• offset — the register offset, literally just where the register lives.
• field — the field you're checking to see if the register is busy 👀
• reg — a pointer to where the register contents should be stored. that's where the good stuff goes. ✨

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🔥 DESCRIPTION 🔥

so here's the vibe: this function reads the given register, and then it checks if the register is busy. that's the whole main character energy of it.

if it is busy? it will sleep for a couple of microseconds before reading the register again 😴 — like a lil nap break, no big deal.

and if the register is still not read after a certain timeout... this function will return FALSE. 💀 that's the sad ending, bestie.

ngl, the timeout is real — if the register refuses to cooperate in time, FALSE is what you get. not a suggestion, that's just how it is. 🥲

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🦋 SEE ALSO 🦋

the kernel file ./drivers/net/wireless/ralink/rt2x00/rt2x00usb.h, plus the whole squad 👑:

• enum rt2x00usb_vendor_request(9)
• enum rt2x00usb_mode_offset(9)
• rt2x00usb_vendor_request(9)
• rt2x00usb_vendor_request_buff(9)
• rt2x00usb_vendor_request_sw(9)
• rt2x00usb_eeprom_read(9)
• rt2x00usb_register_read(9)
• rt2x00usb_register_read_lock(9)
• rt2x00usb_register_multiread(9)
• rt2x00usb_register_write(9)
• rt2x00usb_register_write_lock(9)
• rt2x00usb_register_multiwrite(9)
• rt2x00usb_register_read_async(9)
• struct queue_entry_priv_usb(9)
• struct queue_entry_priv_usb_bcn(9)
• rt2x00usb_kick_queue(9)
• rt2x00usb_flush_queue(9)
• rt2x00usb_watchdog(9)

(and yes that's all of them, i checked, we don't skip entries in this household 💅)

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🎀 sign-off 🎀

this little masterpiece comes from ./drivers/net/wireless/ralink/... and it's dated October 2026, and the page it lives on is rt2x00usb_regbusy_read(9). slay, go read some registers, mwah 💖✨🧚