igb_i21x_hw_doublecheck(9)

🌸 NAME 🌸

okay so bestie, this page is for igb_i21x_hw_doublecheck(9) from the Kernel API Manual, and it is literally here to double-check a potential HW issue in i21X. tiny function, important vibe check. 💅

✨ SYNOPSIS ✨

the whole signature is giving “short and sweet”:

void igb_i21x_hw_doublecheck (struct e1000_hw *hw );

🎀 ARGUMENTS 🎀

• hw — pointer to the HW structure. that’s the hardware struct, periodt. 🫶

💅 DESCRIPTION 💅

so the function checks if the multicast array is wrote correctly. yes, “wrote,” that’s the original wording — we don’t edit the manpage lore. 😭 if it is not wrote correctly, then it rewrites it again to the register. that’s the whole job: double-check the potential HW issue in i21X and fix the multicast array situation by writing it again. iconic little cleanup behavior, ngl. ✨

🦋 SEE ALSO 🦋

the whole friend group of related calls and the kernel file are right here — all links intact, no cap:

• Kernel file ./drivers/net/ethernet/intel/igb/e1000_mac.c
• igb_get_bus_info_pcie(9)
• igb_clear_vfta(9)
• igb_write_vfta(9)
• igb_init_rx_addrs(9)
• igb_find_vlvf_slot(9)
• igb_vfta_set(9)
• igb_check_alt_mac_addr(9)
• igb_rar_set(9)
• igb_mta_set(9)
• igb_hash_mc_addr(9)
• igb_update_mc_addr_list(9)
• igb_clear_hw_cntrs_base(9)
• igb_check_for_copper_link(9)
• igb_setup_link(9)
• igb_config_collision_dist(9)
• igb_set_fc_watermarks(9)
• igb_set_default_fc(9)
• igb_force_mac_fc(9)
• igb_config_fc_after_link_up(9)
• igb_get_speed_and_duplex_copper(9)
• igb_get_hw_semaphore(9)
• igb_put_hw_semaphore(9)
• igb_get_auto_rd_done(9)
• igb_valid_led_default(9)
• igb_id_led_init(9)
• igb_cleanup_led(9)
• igb_blink_led(9)
• igb_led_off(9)
• igb_disable_pcie_master(9)
• igb_validate_mdi_setting(9)
• igb_write_8bit_ctrl_reg(9)
• igb_enable_mng_pass_thru(9)

xoxo, source/version: ./drivers/net/ethernet/intel/igb, dated October 2026 — bye bestie, go double-check those multicast arrays responsibly 💖🎀🦋