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authorVidya Sagar <vidyas@nvidia.com>2024-02-23 13:36:24 -0600
committerBjorn Helgaas <bhelgaas@google.com>2024-03-12 12:09:12 -0500
commit6d4266675279b38c301243f3a4fac4a511b03246 (patch)
treee834f95941d0bea1ac6c5ce7b6c1da067cec31d1 /drivers/dma/idma64.c
parent64dbb2d707444f691539fb12aacf81797786c10b (diff)
PCI/ASPM: Update save_state when configuration changes
Many PCIe device drivers save the configuration state of their device during probe and restore it when their .slot_reset() hook is called during PCIe error recovery. If the ASPM configuration is changed after the driver's probe is called and before an error event occurs, .slot_reset() restores the ASPM configuration to what it was at the time of probe, not to what it was just before the occurrence of the error event. This leads to a mismatch in ASPM configuration between the device and its upstream device. Update the saved configuration of the device when the ASPM configuration changes. Link: https://lore.kernel.org/r/20240222174436.3565146-1-vidyas@nvidia.com Signed-off-by: Vidya Sagar <vidyas@nvidia.com> [bhelgaas: commit log, rebase to pci/aspm, rename to pci_update_aspm_saved_state() since it updates only LNKCTL, update only ASPMC and CLKREQ_EN in LNKCTL] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: David E. Box <david.e.box@linux.intel.com>
Diffstat (limited to 'drivers/dma/idma64.c')
0 files changed, 0 insertions, 0 deletions