Public bug reported:
When I test xenial kernel about PCI function on one ARM64 box, I see
the PCI device does work, and this device is shown with MSI capability.
But the msi_irqs directory can't be found under:
./platform/soc/1f2b0000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/
When I trace the kernel and I found populate_msi_sysfs() is run successfully
from this path(pci_enable_msi), but it looks weird.
[1] lspci:
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5722
Gigabit Ethernet PCI Express
Subsystem: Broadcom Corporation NetXtreme BCM5722 Gigabit Ethernet
PCI Express
Flags: bus master, fast devsel, latency 0, IRQ 93
Memory at c140000000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [48] Power Management version 3
Capabilities: [50] Vital Product Data
Capabilities: [58] Vendor Specific Information: Len=78 <?>
Capabilities: [e8] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Virtual Channel
Capabilities: [160] Device Serial Number 00-10-18-ff-fe-55-33-0d
Capabilities: [16c] Power Budgeting <?>
Kernel driver in use: tg3
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1553934
Title:
xenial: 'msi_irqs' directory isn't show under pci device capable of
MSI
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