wx_check_for_msg_vf(9)

💌 NAME 💌

wx_check_for_msg_vf — okay so this one literally just checks whether the PF has sent mail 💅 that's it, that's the whole vibe. Think of it as peeking in the mailbox to see if the physical function dropped you a little note 🎀

✨ SYNOPSIS ✨

int wx_check_for_msg_vf (struct wx *wx );

🫶 ARGUMENTS 🫶

• wx — pointer to the HW structure, aka the hardware bestie you're checking up on 🦋 like, hand it the struct and it goes and looks.

🔥 RETURN 🔥

It returns 0 if the PF has got the req bit — slay, there's mail, go read it 👑 — or else it hands you back -EBUSY, which is the kernel way of saying "bestie, nothing here yet, try again later" 😭

🌈 SEE ALSO 🌈

The kernel file lives at ./drivers/net/ethernet/wangxun/libwx/wx_mbx.c and honestly the whole mailbox friend group is iconic, no cap:

• wx_obtain_mbx_lock_pf(9)
• wx_check_for_ack_pf(9)
• wx_check_for_msg_pf(9)
• wx_write_mbx_pf(9)
• wx_read_mbx_pf(9)
• wx_check_for_rst_pf(9)
• wx_obtain_mbx_lock_vf(9)
• wx_check_for_ack_vf(9)
• wx_check_for_rst_vf(9)
• wx_poll_for_msg(9)
• wx_poll_for_ack(9)
• wx_read_posted_mbx(9)
• wx_write_posted_mbx(9)
• wx_write_mbx_vf(9)
• wx_read_mbx_vf(9)

💀 reminder: this is the _vf one, don't get it twisted with wx_check_for_msg_pf(9) — they're siblings, not twins, iykyk.

okay that's the whole page, mwah 🍓 this came from the Kernel API Manual, out of ./drivers/net/ethernet/wangxun..., dated October 2026, and it's wx_check_for_msg_vf(9) 💖 go check that mail bestie 🧚✨