On Thu, Jan 22, 2015 at 8:35 AM, Paulo Fortuna Carvalho <pricardofc@xxxxxxxxx> wrote: > Hello Bjorn, > I can add and remove an ATCA card with a PCIExpress endpoint. > UDEV device manager runs hotplug scripts ok and device files are created and > removed from system accdordingly. > Im trying now to run a script that on remove kills running applications > using a certain device before it is removed from system. > To do so I implement in my .rules file an entry regarding "remove" that > calls a script to perform that task. > My problem is that before script runs the device node is no longer there and > my system crashes. > Do you have any idea on how can run my script stopping the applciations > before device remove procedure occurs? If I understand correctly, you want to run a script while your device is still in the system, *before* it is removed. I'm not familiar with the ATCA hotplug slot details. What event would trigger the script to run? Is there an attention button used to request card removal? Is there a sysfs or similar software interface to request removal? > 2015-01-12 16:58 GMT+00:00 Bjorn Helgaas <bhelgaas@xxxxxxxxxx>: >> >> On Mon, Jan 12, 2015 at 5:42 AM, Paulo Fortuna Carvalho >> <pricardofc@xxxxxxxxx> wrote: >> > Hello, >> > I want to automatically load/unload a PCIe device driver when a card >> > is inserted/removed from the system. I can see in the system logger >> > with dmesg that the interrupt event is captured and acknowledged by >> > the pciehp hotplug service driver. >> > What I want to do next is that the operating system load/unload the >> > corresponding PCIe device driver for that card. >> >> When pciehp receives the interrupt, it should enumerate the device, >> and you should see a line in dmesg similar to this (of course, it will >> have different bus/device/function and different vendor/device IDs): >> >> pci 0000:00:16.0: [8086:9c3a] type 00 class 0x078000 >> >> The PCI core should then add the device using device_add(), and part >> of that is to emit a uevent, which can be read by user-space. >> Generally udev would handle the event and load the appropriate driver. >> I don't know the details of how the user-space side works. >> >> 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
