Ilpo Järvinen e09060b3b6 PCI/ASPM: Use RMW accessors for changing LNKCTL ... Don't assume that the device is fully under the control of ASPM and use RMW capability accessors which do proper locking to avoid losing concurrent updates to the register values. If configuration fails in pcie_aspm_configure_common_clock(), the function attempts to restore the old PCI_EXP_LNKCTL_CCC settings. Store only the old PCI_EXP_LNKCTL_CCC bit for the relevant devices rather than the content of the whole LNKCTL registers. It aligns better with how pcie_lnkctl_clear_and_set() expects its parameter and makes the code more obvious to understand. Suggested-by: Lukas Wunner <lukas@wunner.de> Fixes: 2a42d9dba7 ("PCIe: ASPM: Break out of endless loop waiting for PCI config bits to switch") Fixes: 7d715a6c1a ("PCI: add PCI Express ASPM support") Link: https://lore.kernel.org/r/20230717120503.15276-5-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>		2023-08-10 11:13:43 -05:00
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aer_inject.c	PCI/AER: Update aer-inject URL	2022-03-02 11:26:17 -06:00
aer.c	PCI/AER: Remove redundant Device Control Error Reporting Enable	2023-01-26 17:06:13 -06:00
aspm.c	PCI/ASPM: Use RMW accessors for changing LNKCTL	2023-08-10 11:13:43 -05:00
dpc.c	PCI/PM: Drop pci_bridge_wait_for_secondary_bus() timeout parameter	2023-04-11 17:35:06 -05:00
edr.c	PCI/EDR: Add edr_handle_event() comments	2023-04-07 17:39:53 -05:00
err.c	PCI/ERR: Recognize disconnected devices in report_error_detected()	2022-06-08 15:08:40 -05:00
Kconfig	PCI: pciehp: Enable by default if USB4 enabled	2022-11-15 09:25:21 -06:00
Makefile	PCI/portdrv: Squash into portdrv.c	2022-10-24 14:57:30 -05:00
pme.c	PCI/PME: Use PCI_POSSIBLE_ERROR() to check config reads	2021-11-18 14:13:18 -06:00
portdrv.c	PCI/portdrv: Prevent LS7A Bus Master clearing on shutdown	2023-02-01 12:05:28 -06:00
portdrv.h	PCI/portdrv: Move private things to portdrv.c	2022-10-24 14:57:30 -05:00
ptm.c	PCI/PTM: Reorder functions in logical order	2022-09-12 15:29:52 -05:00
rcec.c	PCI/RCEC: Fix RCiEP device to RCEC association	2021-03-10 15:10:46 -06:00