diff options
Diffstat (limited to '')
| -rw-r--r-- | scd/apdu.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/scd/apdu.c b/scd/apdu.c index 8080b42a1..176ab914b 100644 --- a/scd/apdu.c +++ b/scd/apdu.c @@ -1,5 +1,6 @@ /* apdu.c - ISO 7816 APDU functions and low level I/O - * Copyright (C) 2003, 2004, 2008, 2009, 2010 Free Software Foundation, Inc. + * Copyright (C) 2003, 2004, 2008, 2009, 2010, + * 2011 Free Software Foundation, Inc. * * This file is part of GnuPG. * @@ -2355,12 +2356,25 @@ apdu_open_reader (const char *portstr, int *r_no_service) #ifdef HAVE_LIBUSB if (!opt.disable_ccid) { + static int once_available; int i; const char *s; slot = open_ccid_reader (portstr); if (slot != -1) - return slot; /* got one */ + { + once_available = 1; + return slot; /* got one */ + } + + /* If we ever loaded successfully loaded a CCID reader we never + want to fallback to another driver. This solves a problem + where ccid was used, the card unplugged and then scdaemon + tries to find a new reader and will eventually try PC/SC over + and over again. To reset this flag "gpgconf --kill scdaemon" + can be used. */ + if (once_available) + return -1; /* If a CCID reader specification has been given, the user does not want a fallback to other drivers. */ |