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sdl/besjRoED+OWEzm3o5HgMwCxcxZPBn7gRktlJEjtxn8wOr5STAXHagUVv49251xlYskm/Jpv SRpUJwscV4vZztpAs008wpxtFweIroJo0sa+rQ9mkWi7j8aD5C7eZfJ+SmpmtyYdAVNYhyk+YGg rWUcZAefgn+UjpJU44w== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA1MDIwNiBTYWx0ZWRfX9cIRKnXRvOYA uAeooifBDlkH0P432rGSQr8VPWIBLZs/xtU41vNLyno9rKrHFfMmaEYxcUqGA1ncZWLSo7k67qz saZ1TCgHQ1Bq61xkSuu6RsFbxjvsryVvOZSWoKd4CPsaRCryJ8jI Hi Greg/Sasha, On 04/09/26 10:31 am, Greg Kroah-Hartman wrote: > 6.12-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Max Lee > > commit ec3d987fcaf92516d13ee18c305c82281557046d upstream. > > The Realtek RTS525A PCIe card reader reports an AER Correctable Replay > Timer Timeout storm when ASPM L0s is enabled on its link. On an affected > HP ZBook Power 16 inch G11, the Root Port received tens of millions of AER > interrupts from the RTS525A even when the rtsx_pci driver was blacklisted > and the endpoint was not enabled by a driver. > > For example: > > pcieport 0000:00:1c.6: AER: Multiple Correctable error message received from 0000:58:00.0 > rtsx_pci 0000:58:00.0: PCIe Bus Error: severity=Correctable, type=Data Link Layer, (Transmitter ID) > rtsx_pci 0000:58:00.0: device [10ec:525a] error status/mask=00001000/00006000 > rtsx_pci 0000:58:00.0: [12] Timeout > pcieport 0000:00:1c.6: AER: Correctable error message received from 0000:58:00.0 > > Testing with OS-native AER control showed that disabling only L0s on the > RTS525A link stops new AER interrupt and counter growth while leaving L1 > enabled. Disabling L1, L1 substates, or Clock PM alone did not stop the > storm. > > Prevent the broken L0s configuration by removing L0s from the RTS525A > advertised ASPM capability. This avoids enabling the non-working ASPM > state instead of masking the resulting AER Replay Timer Timeout reports. > > Signed-off-by: Max Lee > Signed-off-by: Bjorn Helgaas > Reviewed-by: Lukas Wunner > Reviewed-by: Manivannan Sadhasivam > Cc: stable@vger.kernel.org > Link: https://patch.msgid.link/20260707021527.639611-1-max.lee@canonical.com > Signed-off-by: Greg Kroah-Hartman > --- > drivers/pci/quirks.c | 3 +++ > 1 file changed, 3 insertions(+) > > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -2503,6 +2503,9 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN > DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10f4, quirk_disable_aspm_l0s); > DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1508, quirk_disable_aspm_l0s); > > +/* Realtek RTS525A generates a Replay Timer Timeout storm when L0s is enabled. */ > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_REALTEK, 0x525a, quirk_disable_aspm_l0s); > + ^^^^ I have run an AI-assisted backport review and spotted an issue. Upstream commit: ec3d987fcaf9 ("PCI/ASPM: Avoid L0s for Realtek RTS525A") disables L0s before ASPM initialization using cached capabilities. On 6.12.y, the HEADER quirk calls: pci_disable_link_state(dev, PCIE_LINK_STATE_L0S); At this point link_state does not exist, so the call returns -EINVAL and L0s remains enabled. The required support comes from commit: 4495bffd86ba, commit: 575b98e39d81, and commit: 30579eebba6a. None is present in 6.12.y. Without those prerequisites or a 6.12-specific fix, I would suggest dropping commit: dbccca7f5d2f ("PCI/ASPM: Avoid L0s for Realtek RTS525A"). Thoughts? thanks, Harshit > static void quirk_disable_aspm_l0s_l1(struct pci_dev *dev) > { > pci_info(dev, "Disabling ASPM L0s/L1\n"); > > >