Reproducer:
./x86_64-softmmu/qemu-system-x86_64 -device usb-ccid,id=ccid0 -usb -device
ccid-card-emulated -monitor stdio
Signed-off-by: Cole Robinson <crobi...@redhat.com>
---
hw/usb/ccid-card-emulated.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/hw/usb/ccid-card-emulated.c b/hw/usb/ccid-card-emulated.c
index 29dcd7a..65e1432 100644
--- a/hw/usb/ccid-card-emulated.c
+++ b/hw/usb/ccid-card-emulated.c
@@ -500,9 +500,15 @@ static int emulated_initfn(CCIDCardState *base)
if (init_pipe_signaling(card) < 0) {
return -1;
}
- card->backend = parse_enumeration(card->backend_str, backend_enum_table,
0);
+
+ card->backend = 0;
+ if (card->backend_str) {
+ card->backend = parse_enumeration(card->backend_str,
+ backend_enum_table, 0);
+ }
+
if (card->backend == 0) {
- printf("unknown backend, must be one of:\n");
+ printf("backend must be one of:\n");
for (ptable = backend_enum_table; ptable->name != NULL; ++ptable) {
printf("%s\n", ptable->name);
}
--
1.8.1.4
