Re: Hotplug Debugging

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On Tue, May 15, 2012 at 7:51 PM, LinuxDrvDev
<ushmasonal-linuxmail@xxxxxxxxx> wrote:
> Hi,
> 2. The lspci -vv output of the root port and the device shows that "ASPM  disabled". Is this the indication that it doesn't support hotplug?

should have slot cap in lspci reporting like

00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI
Express Root Port 4 (rev b4) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=05, subordinate=0c, sec-latency=0
	I/O behind bridge: 00004000-00004fff
	Memory behind bridge: f1c00000-f23fffff
	Prefetchable memory behind bridge: 00000000f0400000-00000000f0bfffff
...
		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+
			Slot #3, PowerLimit 10.000W; Interlock- NoCompl+
		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet+ CmdCplt- HPIrq- LinkChg-
			Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
			Changed: MRL- PresDet- LinkState-
...
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