github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 10:33:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

PCI/ASPM: Avoid L0s and L1 on Freescale [1957:0451] Root Ports

Browse Source 
Christian reported that f3ac2ff148 ("PCI/ASPM: Enable all ClockPM and
ASPM states for devicetree platforms") broke booting on the A-EON X5000.

Override the L0s and L1 Support advertised in Link Capabilities by the
X5000 Root Ports ([1957:0451]) so we don't try to enable those states.

Fixes: f3ac2ff148 ("PCI/ASPM: Enable all ClockPM and ASPM states for devicetree platforms")
Fixes: df5192d9bb ("PCI/ASPM: Enable only L0s and L1 for devicetree platforms")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Link: https://lore.kernel.org/r/db5c95a1-cf3e-46f9-8045-a1b04908051a@xenosoft.de
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Link: https://patch.msgid.link/20251110222929.2140564-5-helgaas@kernel.org
This commit is contained in:
Bjorn Helgaas 2025-11-10 16:22:28 -06:00
parent 30579eebba
commit 5b40a5080c
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/pci/quirks.c
View File

@ -2523,6 +2523,7 @@ static void quirk_disable_aspm_l0s_l1(struct pci_dev *dev)
* disable both L0s and L1 for now to be safe.
*/
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1080, quirk_disable_aspm_l0s_l1);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, 0x0451, quirk_disable_aspm_l0s_l1);
/*
* Some Pericom PCIe-to-PCI bridges in reverse mode need the PCIe Retrain