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linux/drivers/pci/pcie
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Ilpo Järvinen fb10875455 PCI/bwctrl: Disable BW controller on Intel P45 using a quirk 
[ Upstream commit 46a9f70e93 ]

The commit 665745f274 ("PCI/bwctrl: Re-add BW notification portdrv as
PCIe BW controller") was found to lead to a boot hang on a Intel P45
system. Testing without setting Link Bandwidth Management Interrupt Enable
(LBMIE) and Link Autonomous Bandwidth Interrupt Enable (LABIE) (PCIe r7.0,
sec 7.5.3.7) in bwctrl allowed system to come up.

P45 is a very old chipset and supports only up to gen2 PCIe, so not having
bwctrl does not seem a huge deficiency.

Add no_bw_notif in struct pci_dev and quirk Intel P45 Root Port with it.

Reported-by: Adam Stylinski <kungfujesus06@gmail.com>
Link: https://lore.kernel.org/linux-pci/aUCt1tHhm_-XIVvi@eggsbenedict/
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Adam Stylinski <kungfujesus06@gmail.com>
Link: https://patch.msgid.link/20260116131513.2359-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:20:27 -05:00
..
aer.c PCI/AER: Clear stale errors on reporting agents upon probe 2026-03-04 07:20:26 -05:00
aer_inject.c PCI/AER: Use PCI_DEVID() macro in aer_inject() 2024-09-01 17:05:45 +00:00
aspm.c pci-v6.18-fixes-5 2025-11-14 15:45:31 -08:00
bwctrl.c PCI/bwctrl: Disable BW controller on Intel P45 using a quirk 2026-03-04 07:20:27 -05:00
dpc.c PCI/AER: Convert aer_get_device_error_info(), aer_print_error() to index 2025-05-23 11:11:36 -05:00
edr.c PCI/EDR: Align EDR_PORT_LOCATE_DSM with PCI Firmware r3.3 2024-05-08 15:08:39 -05:00
err.c PCI/ERR: Update device error_state already after reset 2025-08-13 13:20:56 -05:00
Kconfig PCI/AER: Update aer-inject tool source URL 2024-04-17 10:35:43 -05:00
Makefile PCI: Move TLP Log handling to its own file 2025-01-14 17:38:18 -06:00
pme.c PCI/PME: Use FIELD_GET() 2023-10-24 16:55:45 -05:00
portdrv.c PCI/portdrv: Fix potential resource leak 2026-02-26 14:59:16 -08:00
portdrv.h PCI/bwctrl: Re-add BW notification portdrv as PCIe BW controller 2024-11-16 10:09:04 -06:00
ptm.c PCI/PTM: Fix pcie_ptm_create_debugfs() memory leak 2026-02-26 14:59:16 -08:00
rcec.c PCI/RCEC: Fix RCiEP device to RCEC association 2021-03-10 15:10:46 -06:00
tlp.c PCI/ERR: Add printk level to pcie_print_tlp_log() 2025-05-23 11:02:03 -05:00