On Wed, Feb 12, 2014 at 1:00 AM, Izumi, Taku <izumi.taku@xxxxxxxxxxxxxx> wrote: > Hi Bjorn, > >> Hi Taku, >> >> Thanks a lot for finding and bisecting this problem. I recently merged >> some patches from Rajat that partially revert 2debd9289997. Can you try >> out my pci/pciehp branch and see whether it is enough to fix the problem >> for you? >> >> Here's the branch: >> http://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/log/?h=pci/pciehp >> >> and the specific change Rajat made is: >> http://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci/pciehp&id=b1811d2455f32754cc3d8725bf2e961c >> 5eda2a72 >> >> Let me know if that isn't enough to fix the problem you're seeing, and we >> can work on it some more. > > I tested the kernel checkouted from remotes/origin/pci/pciehp. > The original problem I reported was fixed. > However the sequence of hot-plug operation got changed. > The slot power becomes ON the moment when I insert PCIe card on the slot. > This behavior is unacceptable to me. > > (before) > - hot-add > 1. insert PCIe card > 2. echo 1 > power > - hot-remove > 1. echo 0 > power > 2. eject PCIe card > > (after) > - hot-add > 1. insert PCIe card (and automatically power-on) > > - hot-remove > 1. echo 0 > power > 2. eject PCIe card Huh, that doesn't sound good. Does your slot have an attention button? Can you collect the "lspci -vvv" output for the Downstream Port leading to this slot? I think that for ExpressCard and similar devices, we want to turn on the device and attach a driver as soon as the card is inserted. But in your case, I assume we want a model like that in Table 2-7 of the "PCI Standard Hot-Plug Controller and Subsystem Specification," rev 1.0, i.e., "Hot Insertion Initiated via Software UI." So there must be some way to differentiate an ExpressCard slot from a slot like yours. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
