diff options
| author | Hongren (Zenithal) Zheng <i@zenithal.me> | 2022-06-13 20:14:19 +0800 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2022-07-01 12:37:36 +0200 |
| commit | ada270cd18723c575120c379d0234a1eafeba3dc (patch) | |
| tree | 37e06d2b0b1ac09ce976072457b1afca63fee364 /hw/usb | |
| parent | 8c0d80245f3cdbbe6003844751d8fc6b1db7b1e4 (diff) | |
hw/usb/canokey: Fix CCID ZLP
CCID could send zero-length packet (ZLP)
if we invoke two data_in, two packets would be concated
and we could not distinguish them.
The CANOKEY_EMU_EP_CTAPHID is imported from canokey-qemu.h
Reported-by: MkfsSion <myychina28759@gmail.com>
Signed-off-by: Hongren (Zenithal) Zheng <i@zenithal.me>
Message-Id: <YqcqGz0s3+LE42ms@Sun>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/usb')
| -rw-r--r-- | hw/usb/canokey.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/hw/usb/canokey.c b/hw/usb/canokey.c index 4a08b1cbd7..86548923eb 100644 --- a/hw/usb/canokey.c +++ b/hw/usb/canokey.c @@ -109,11 +109,10 @@ int canokey_emu_transmit( * Note: this is a quirk for CanoKey CTAPHID * because it calls multiple emu_transmit in one device_loop * but w/o data_in it would stuck in device_loop - * This has no side effect for CCID as it is strictly - * OUT then IN transfer - * However it has side effect for Control transfer + * This has side effect for CCID since CCID can send ZLP + * This also has side effect for Control transfer */ - if (ep_in != 0) { + if (ep_in == CANOKEY_EMU_EP_CTAPHID) { canokey_emu_data_in(ep_in); } return 0; |