[Muscle] ccid driver: "usb_bulk_read: Resource temporarily unavailable"

[Nagy Gabor]

Hi!

You probably know about this problem, because I found the following comment in
ifdhandler.c:
/* This "warm up" sequence is sometimes needed when pcscd is
 * restarted with the reader already connected. We get some
 * "usb_bulk_read: Resource temporarily unavailable" on the first
 * few tries. It is an empirical hack */

Well, this hack may be acceptable, but I have a problem:
When pcscd does this hack, it _lies_ to the caller app, that the reader is not
present. This is a problem, because most people (like me), have an S50pcscd in
/etc/rc?.d/ and something like S51card_eventmanager which depends on pcscd. On
my machine card_eventmanager (I use my patched version:
http://jedlik.vein.hu:60080/linux/scard_tools/scard_tools-en.html) cannot start,
because SCardListReaders returns with empty reader-list. It took a while to
found the reason for this problem (I had to add 'sleep 4' to the end of pcscd
init-script as a workaround).
So I would prefer if SCardListReaders returned with the correct results (even if
my program must wait 4 sec for the result) or an internally delayed pcscd start.

Bye, ngaba


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