0001-call-usb_set_configuration-before-usb_claim_interf.patch

   1 From 128f757596a32ae23fe61711883f6210e1d90bd0 Mon Sep 17 00:00:00 2001
   2 From: Mike Frysinger <vapier@gentoo.org>
   3 Date: Thu, 24 Apr 2008 02:00:15 -0400
   4 Subject: [PATCH] call usb_set_configuration() before usb_claim_interface()
   5
   6 ---
   7  src/ftdi.c |   10 ++++++++++
   8  1 files changed, 10 insertions(+), 0 deletions(-)
   9
  10 diff --git a/src/ftdi.c b/src/ftdi.c
  11 index 043d24a..56fea0c 100644
  12 --- a/src/ftdi.c
  13 +++ b/src/ftdi.c
  14 @@ -341,6 +341,7 @@ int ftdi_usb_get_strings(struct ftdi_context * ftdi, struct usb_device * dev,
  15      \param dev libusb usb_dev to use
  16
  17      \retval  0: all fine
  18 +    \retval -3: unable to config device
  19      \retval -4: unable to open device
  20      \retval -5: unable to claim device
  21      \retval -6: reset failed
  22 @@ -359,6 +360,15 @@ int ftdi_usb_open_dev(struct ftdi_context *ftdi, struct usb_device *dev)
  23          detach_errno = errno;
  24  #endif
  25
  26 +    if (usb_set_configuration(ftdi->usb_dev, dev->config[0].bConfigurationValue)) {
  27 +        usb_close (ftdi->usb_dev);
  28 +        if (detach_errno == EPERM) {
  29 +            ftdi_error_return(-8, "inappropriate permissions on device!");
  30 +        } else {
  31 +            ftdi_error_return(-3, "unable to set usb configuration. Make sure ftdi_sio is unloaded!");
  32 +        }
  33 +    }
  34 +
  35      if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0) {
  36          usb_close (ftdi->usb_dev);
  37          if (detach_errno == EPERM) {
  38 --
  39 1.5.5
  40