On Thu, 3 May 2012, Xiaofan Chen wrote: > Last time we have a long discussion here and there is no good > solution to the following ticket. > http://www.libusb.org/ticket/125 > libusb_kernel_driver_active() and _detach() are racy > "If the functionality is to be kept in the next API then let's do > something that isn't racy." > > Relevant discussion (long thread). > http://libusb.6.n5.nabble.com/Patch-libusb-os-linux-usbfs-c-Distingush-between-usbfs-and-other-kernel-mode-drivers-td3199947.html > > Any new thought on this topic? Is it even possible to do this > without changing the Linux kernel usbfs driver?
I don't think so. At the very least, it would be necessary to change the USBDEVFS_DISCONNECT ioctl to make it avoid doing anything if the current driver is usbfs. A better approach would be to allow the user to specify a driver name, and have USBDEVFS_DISCONNECT do nothing if the current driver isn't the one specified. Alan Stern ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
