On Mon, Aug 21, 2006 at 04:49:12PM +0800, Yu Luming wrote: > On Monday 21 August 2006 10:49, danny@xxxxxxxxxxx wrote: > > Hi, > > Recently I noticed that unloading video.ko causes a warning from > > remove_proc_entry because the subdir is not empty. This is related to the > > fact that I have 2 VID entries in /proc/acpi/video, and this messes up > > things a bit. The cause of this is that the VID entry appears both on the > > PCI and on the AGP bus, sysfs handles this nicely: > > ./firmware/acpi/namespace/ACPI/_SB/PCI0/AGP/VID > >... > > Yes, This is a problem. > > > More information can be found here: > > http://qa.mandriva.com/show_bug.cgi?id=22249 > > > > proc/acpi/video/ does not know about AGP or PCI. Attached patch fixes the > > problem but is not so beautiful. Maybe it's better to make another subdir > > in video for the parent of the device, but I thought this would be more > > likely to break userland apps. Perhaps someone can do better. > > > > The beautiful way is to completely delete /proc/acpi, and turn to sysfs. :-) > But we still have to live with /proc/acpi for some times. > So, I think your patch is right thing. > > >+ strcpy(proc_dir_name, acpi_device_bid(device)); > >+ strcat(proc_dir_name, "_"); > >+ strcat(proc_dir_name, acpi_device_bid(device->parent)); > > but, when you are using acpi_device_bid(device->parent), you > should have checked device->parent is NOT NULL. > Yes I considered this, but then I thought, if there is actually a VID bus, it always has a parent. You cannot have a bus that correctly passes the checks for being the acpi video device and not have a parent bus. Or can you? Second question is the size of proc_dir_name: is 32 big enough? Should I have used strncat. I really have no idea at the maximum possible size of the names we get from the dsdt. Danny - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
