igb_disable_pcie_master(9)

💅 igb_disable_pcie_master — Kernel API Manual, but make it make sense 💅

okay bestie, welcome to the Kernel API Manual entry for igb_disable_pcie_master(9) ✨ this is a little function that does one very specific thing and then checks its own work, and honestly? we love an accountable icon.

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🎀 NAME 🎀

igb_disable_pcie_master — literally just turns off PCI-express master access 🫶

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✨ SYNOPSIS ✨

s32 igb_disable_pcie_master (struct e1000_hw *hw );

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🌸 ARGUMENTS 🌸

• hw — pointer to the HW structure 💖 like, it needs to know which hardware bestie we're talking about

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🦋 DESCRIPTION 🦋

So here's the vibe. This function disables PCI-Express master access and then verifies there are no pending requests. no cap, it actually checks. 🔍

And it returns:

• 0 (0) if it's successful 🎉 slay
• -10 (-E1000_ERR_MASTER_REQUESTS_PENDING) if the master disable bit has not caused the master requests to be disabled 😭 meaning the whole thing didn't take, and it's telling you so

lowkey important: that second one isn't a fun surprise, it's the function being honest with you. respect. 💅

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👑 SEE ALSO 👑

first up, the kernel file itself, because that's where the whole lore lives:

• ./drivers/net/ethernet/intel/igb/e1000_mac.c

and now the whole friend group, the entire group chat, every single one of them, in original order, no one left out 🫶:

• 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_i21x_hw_doublecheck(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_validate_mdi_setting(9)
• igb_write_8bit_ctrl_reg(9)
• igb_enable_mng_pass_thru(9)

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okay that's the whole page, go read the source bestie 🌈💜

and for the cute sign-off: this one comes from ./drivers/net/ethernet/intel/igb, dated October 2026, and it's filed under igb_disable_pcie_master(9) — periodt. 💅✨