https://bugzilla.kernel.org/show_bug.cgi?id=42844
--- Comment #13 from WZab <w...@ise.pw.edu.pl> 2012-09-03 16:42:42 ---
I have found yet one fact about Dell Vostro, which maybe can explain the
problem.
The USB 3.0 controller uses the IRQ 18:
03:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev
04) (prog-if 30 [XHCI])
Subsystem: Dell Device 04c6
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at f2900000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [50] Power Management version 3
Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
Capabilities: [90] MSI-X: Enable+ Count=8 Masked-
Capabilities: [a0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff
Capabilities: [150] Latency Tolerance Reporting
Kernel driver in use: xhci_hcd
The SMBus controller uses the same IRQ:
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus
Controller (rev 05)
Subsystem: Dell Device 04c6
Flags: medium devsel, IRQ 18
Memory at f2b04000 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]
Maybe the problem is associated with interrupt handling in the SMBus driver?
If during the boot any device is connected to the USB 3.0 jack, the USB 3.0
controller generates IRQ 18 interrupts, which causes hang in the SMBus driver?
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