AuxXxilium/linux_dsm_epyc7002
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35ff867b76
linux_dsm_epyc7002/drivers/pci
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Pierre Crégut 35ff867b76 PCI/IOV: Serialize sysfs sriov_numvfs reads vs writes 
When sriov_numvfs is being updated, we call the driver->sriov_configure()
function, which may enable VFs and call probe functions, which may make new
devices visible.  This all happens before before sriov_numvfs_store()
updates sriov->num_VFs, so previously, concurrent sysfs reads of
sriov_numvfs returned stale values.

Serialize the sysfs read vs the write so the read returns the correct
num_VFs value.

[bhelgaas: hold device_lock instead of checking mutex_is_locked()]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=202991
Link: https://lore.kernel.org/r/20190911072736.32091-1-pierre.cregut@orange.com
Signed-off-by: Pierre Crégut <pierre.cregut@orange.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2019-10-15 16:39:12 -05:00
..
controller pci-v5.4-changes 2019-09-23 19:16:01 -07:00
endpoint PCI: endpoint: Clear BAR before freeing its space 2019-06-11 10:57:54 +01:00
hotplug pci-v5.4-changes 2019-09-23 19:16:01 -07:00
pcie pci-v5.4-changes 2019-09-23 19:16:01 -07:00
switch New feature to add support for NTB virtual MSI interrupts, the ability 2019-07-21 09:46:59 -07:00
access.c PCI: Make pcie_downstream_port() available outside of access.c 2019-09-07 07:45:25 -05:00
ats.c PCI/ATS: Remove unnecessary EXPORT_SYMBOL_GPL() 2019-10-15 16:39:11 -05:00
bus.c PCI: Unexport pci_bus_get() and pci_bus_put() 2019-07-23 18:32:49 -05:00
ecam.c PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate 2018-01-28 15:48:29 -06:00
host-bridge.c PCI: Tidy comments 2018-03-19 14:20:43 -05:00
iov.c PCI/IOV: Serialize sysfs sriov_numvfs reads vs writes 2019-10-15 16:39:12 -05:00
irq.c PCI: Use IRQF_ONESHOT if pci_request_irq() called with no handler 2018-07-31 10:43:43 -05:00
Kconfig pci-v5.4-changes 2019-09-23 19:16:01 -07:00
Makefile PCI: OF: Allow of_pci_get_max_link_speed() to be used by PCI Endpoint drivers 2019-04-15 13:24:02 +01:00
mmap.c PCI: Fix typos and whitespace errors 2019-07-09 07:24:53 -05:00
msi.c New feature to add support for NTB virtual MSI interrupts, the ability 2019-07-21 09:46:59 -07:00
of.c PCI: OF: Correct of_irq_parse_pci() documentation 2019-08-30 14:00:34 -05:00
p2pdma.c PCI/P2PDMA: Update pci_p2pdma_distance_many() documentation 2019-08-16 08:41:59 -05:00
pci-acpi.c Merge branch 'pci/enumeration' 2019-09-23 16:10:08 -05:00
pci-bridge-emul.c PCI: Use static const struct, not const static struct 2019-09-05 13:26:46 -05:00
pci-bridge-emul.h PCI: pci-bridge-emul: Extend pci_bridge_emul_init() with flags 2019-02-22 10:51:14 +00:00
pci-driver.c pci-v5.3-changes 2019-07-15 20:44:49 -07:00
pci-label.c PCI: Tidy comments 2018-03-19 14:20:43 -05:00
pci-mid.c x86/cpu: Sanitize FAM6_ATOM naming 2018-10-02 10:14:32 +02:00
pci-pf-stub.c PCI: Fix typos and whitespace errors 2019-07-09 07:24:53 -05:00
pci-stub.c PCI: Replace printk(KERN_INFO) with pr_info(), etc 2019-05-09 07:49:54 -05:00
pci-sysfs.c Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
pci.c pci-v5.4-changes 2019-09-23 19:16:01 -07:00
pci.h PCI/ATS: Make pci_restore_pri_state(), pci_restore_pasid_state() private 2019-10-15 16:39:11 -05:00
probe.c PCI/ATS: Cache PASID Capability offset 2019-10-15 16:39:10 -05:00
proc.c Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
quirks.c PCI: Add DMA alias quirk for Intel VCA NTB 2019-10-15 16:39:12 -05:00
remove.c PCI/ASPM: Fix link_state teardown on device removal 2018-09-17 16:32:23 -05:00
rom.c PCI: Make pci_get_rom_size() static 2018-06-29 21:17:26 -05:00
search.c PCI: Unexport pci_bus_sem 2019-07-23 18:32:50 -05:00
setup-bus.c PCI: Use PCI_SRIOV_NUM_BARS in loops instead of PCI_IOV_RESOURCE_END 2019-08-08 15:12:12 -05:00
setup-irq.c PCI: Tidy comments 2018-03-19 14:20:43 -05:00
setup-res.c PCI: Remove messages about reassigning resources 2018-04-11 08:46:50 -05:00
slot.c PCI: Decode PCIe 32 GT/s link speed 2019-06-13 16:49:45 -05:00
syscall.c PCI: Lock down BAR access when the kernel is locked down 2019-08-19 21:54:15 -07:00
vc.c Merge branch 'pci/trivial' 2019-09-23 16:10:31 -05:00
vpd.c PCI/VPD: Prevent VPD access for Amazon's Annapurna Labs Root Port 2019-09-16 14:10:09 +01:00
xen-pcifront.c Merge branch 'pci/printk' 2019-05-13 18:34:46 -05:00