Re: Detach kernel driver

Michal Demin wrote:

Subject: [PATCH 1/2] Detach the device kernel driver when kernel driver loaded.

..

@@ -689,6 +690,15 @@ int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)

libusb_free_device_list(list, 0);

• if (libusb_kernel_driver_active(dev->devh, 0)) {

• // reattach later
  

• dev->reattach = 1;
  

• if (libusb_detach_kernel_driver(dev->devh, 0)) {
  

• 	fprintf(stderr, "Error detaching kernel driver \n");
  

• 	goto err;
  

• }
  

• }
• r = libusb_claim_interface(dev->devh, 0); if (r < 0) { fprintf(stderr, "usb_claim_interface error %d\n", r);

This is racy. It's better to call libusb_detach_kernel_driver() when libusb_claim_interface() returns an error.

//Peter