On Fri, 04 Nov 2022 08:35:18 +0100, aichao wrote:
For Hamedal C20, the current rate is different from the runtime rate, snd_usb_endpoint stop and close endpoint to resetting rate. if snd_usb_endpoint close the endpoint, sometimes usb will disconnect the device.
Signed-off-by: aichao aichao@kylinos.cn
OK, this is more understandable than the previous one.
But it doesn't look like a proper workaround, and we need to figure out the culprit more deeply. The interface is anyway reset once when the parameter is changed / re-setup. Doesn't it hit the same problem? Or it's about clearing the interface and keep it for long time?
In anyway, please give lsusb -v output of the device.
BTW, is aichao your full name? The sign-off must be with the real full name, and it's a legal requirement.
thanks,
Takashi
sound/usb/endpoint.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 533919a28856..c19e420b1780 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -825,7 +825,9 @@ void snd_usb_endpoint_close(struct snd_usb_audio *chip, usb_audio_dbg(chip, "Closing EP 0x%x (count %d)\n", ep->ep_num, ep->opened);
- if (!--ep->iface_ref->opened)
if (!--ep->iface_ref->opened
&& (le16_to_cpu(chip->dev->descriptor.idVendor) != 0x0525)&& (le16_to_cpu(chip->dev->descriptor.idProduct) != 0xa4ad))endpoint_set_interface(chip, ep, false);
if (!--ep->opened) {
-- 2.25.1