Ming Lei 5ab9b2bc8a PCI/MSI: Return -ENOSPC from pci_alloc_irq_vectors_affinity() ... [ Upstream commit 77f88abd4a ] The API of pci_alloc_irq_vectors_affinity() says it returns -ENOSPC if fewer than @min_vecs interrupt vectors are available for @dev. However, if a device supports MSI-X but not MSI and a caller requests @min_vecs that can't be satisfied by MSI-X, we previously returned -EINVAL (from the failed attempt to enable MSI), not -ENOSPC. When -ENOSPC is returned, callers may reduce the number IRQs they request and try again. Most callers can use the @min_vecs and @max_vecs parameters to avoid this retry loop, but that doesn't work when using IRQ affinity "nr_sets" because rebalancing the sets is driver-specific. This return value bug has been present since pci_alloc_irq_vectors() was added in v4.10 by aff171641d ("PCI: Provide sensible IRQ vector alloc/free routines"), but it wasn't an issue because @min_vecs/@max_vecs removed the need for callers to iteratively reduce the number of IRQs requested and retry the allocation, so they didn't need to distinguish -ENOSPC from -EINVAL. In v5.0, 6da4b3ab9a ("genirq/affinity: Add support for allocating interrupt sets") added IRQ sets to the interface, which reintroduced the need to check for -ENOSPC and possibly reduce the number of IRQs requested and retry the allocation. Signed-off-by: Ming Lei <ming.lei@redhat.com> [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Jens Axboe <axboe@fb.com> Cc: Keith Busch <keith.busch@intel.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-12-05 15:37:55 +01:00
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dwc	PCI: keystone: Use quirk to limit MRRS for K2G	2019-12-01 09:14:13 +01:00
endpoint	PCI: endpoint: Use EPC's device in dma_alloc_coherent()/dma_free_coherent()	2019-03-27 14:13:55 +09:00
host	PCI: vmd: Detach resources after stopping root bus	2019-12-01 09:13:40 +01:00
hotplug	PCI: rpadlpar: Fix leaked device_node references in add/remove paths	2019-06-15 11:54:56 +02:00
pcie	PCI/PME: Fix possible use-after-free on remove	2019-11-06 12:42:59 +01:00
switch	switchtec: Fix SWITCHTEC_IOCTL_EVENT_IDX_ALL flags overwrite	2019-02-12 19:46:04 +01:00
access.c
ats.c
bus.c
ecam.c
host-bridge.c
hotplug-pci.c
htirq.c
iov.c
irq.c
Kconfig
Makefile
mmap.c
msi.c	PCI/MSI: Return -ENOSPC from pci_alloc_irq_vectors_affinity()	2019-12-05 15:37:55 +01:00
of.c
pci-acpi.c	PCI / ACPI: Enable wake automatically for power managed bridges	2018-11-13 11:14:58 -08:00
pci-driver.c	PCI: Always allow probing with driver_override	2019-09-19 09:08:06 +02:00
pci-label.c
pci-mid.c	x86/cpu: Sanitize FAM6_ATOM naming	2019-05-14 19:18:42 +02:00
pci-stub.c
pci-sysfs.c	PCI: sysfs: Ignore lockdep for remove attribute	2019-07-31 07:28:52 +02:00
pci.c	PCI: PM: Fix pci_power_up()	2019-10-29 09:17:45 +01:00
pci.h
probe.c	PCI: Skip MPS logic for Virtual Functions (VFs)	2018-08-24 13:09:22 +02:00
proc.c
quirks.c	PCI: Work around Pericom PCIe-to-PCI bridge Retrain Link erratum	2019-05-25 18:25:32 +02:00
remove.c	PCI/ASPM: Fix link_state teardown on device removal	2018-11-13 11:15:07 -08:00
rom.c
search.c
setup-bus.c
setup-irq.c
setup-res.c
slot.c
syscall.c
vc.c
vpd.c
xen-pcifront.c