Ilpo Järvinen fae0e055d0 PCI: Do not wait for disconnected devices when resuming ... [ Upstream commit 6613443ffc ] On runtime resume, pci_dev_wait() is called: pci_pm_runtime_resume() pci_pm_bridge_power_up_actions() pci_bridge_wait_for_secondary_bus() pci_dev_wait() While a device is runtime suspended along with its PCI hierarchy, the device could get disconnected. In such case, the link will not come up no matter how long pci_dev_wait() waits for it. Besides the above mentioned case, there could be other ways to get the device disconnected while pci_dev_wait() is waiting for the link to come up. Make pci_dev_wait() exit if the device is already disconnected to avoid unnecessary delay. The use cases of pci_dev_wait() boil down to two: 1. Waiting for the device after reset 2. pci_bridge_wait_for_secondary_bus() The callers in both cases seem to benefit from propagating the disconnection as error even if device disconnection would be more analoguous to the case where there is no device in the first place which return 0 from pci_dev_wait(). In the case 2, it results in unnecessary marking of the devices disconnected again but that is just harmless extra work. Also make sure compiler does not become too clever with dev->error_state and use READ_ONCE() to force a fetch for the up-to-date value. Link: https://lore.kernel.org/r/20240208132322.4811-1-ilpo.jarvinen@linux.intel.com Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-06-27 13:49:05 +02:00
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acpi	ACPI: x86: Move acpi_quirk_skip_serdev_enumeration() out of CONFIG_X86_ANDROID_TABLETS	2024-04-13 13:07:31 +02:00
asm-generic	sched: Add missing memory barrier in switch_mm_cid	2024-04-27 17:11:41 +02:00
clocksource
crypto
drm	drm/edid: Parse topology block for all DispID structure v1.x	2024-06-12 11:12:05 +02:00
dt-bindings
keys
kunit
kvm	KVM: arm64: Fix host-programmed guest events in nVHE	2024-04-10 16:35:48 +02:00
linux	PCI: Do not wait for disconnected devices when resuming	2024-06-27 13:49:05 +02:00
math-emu
media	media: cec: core: avoid recursive cec_claim_log_addrs	2024-06-12 11:12:43 +02:00
memory
misc
net	net/sched: fix false lockdep warning on qdisc root lock	2024-06-27 13:49:02 +02:00
pcmcia
ras
rdma
rv
scsi	scsi: mpi3mr: Fix ATA NCQ priority support	2024-06-21 14:38:25 +02:00
soc	soc: qcom: rpmh-rsc: Enhance check for VRM in-flight request	2024-06-16 13:47:33 +02:00
sound	ASoC: tas2781: Fix wrong loading calibrated data sequence	2024-06-12 11:12:47 +02:00
target
trace	cachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read()	2024-06-21 14:38:27 +02:00
uapi	drm/nouveau: use tile_mode and pte_kind for VM_BIND bo allocations	2024-06-12 11:12:45 +02:00
ufs
vdso
video
xen