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fx2lafw: Fix #445 by detaching the kernel driver (if any) 

This avoids the need to run "rmmod usbtest" on Linux for devices
with the standard Cypress FX2 USB VID/PID (04b4:8613).
This commit is contained in:
Soeren Apel 2015-07-06 21:20:26 +02:00 committed by Uwe Hermann
parent 536141ff49
commit 39e4517759
1 changed files with 10 additions and 0 deletions
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10
src/hardware/fx2lafw/api.c
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@ -370,6 +370,16 @@ static int dev_open(struct sr_dev_inst *sdi)
devc = sdi->priv;
usb = sdi->conn;
if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
sr_err("Failed to detach kernel driver: %s.",
libusb_error_name(ret));
return SR_ERR;
}
}
}
/*
* If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
* milliseconds for the FX2 to renumerate.