>
>On Thu, Sep 30, 2021 at 11:42:17AM +0200, Pawel Laszczak wrote:
>> From: Pawel Laszczak <pawell@xxxxxxxxxxx>
>>
>> commit b69ec50b3e55c4b2a85c8bc46763eaf33060584 upstream
>>
>> For DEV_VER_V3 version there exist race condition between clearing
>> ep_sts.EP_STS_TRBERR and setting ep_cmd.EP_CMD_DRDY bit.
>> Setting EP_CMD_DRDY will be ignored by controller when
>> EP_STS_TRBERR is set. So, between these two instructions we have
>> a small time gap in which the EP_STS_TRBERR can be set. In such case
>> the transfer will not start after setting doorbell.
>>
>> Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
>> cc: <stable@xxxxxxxxxxxxxxx> # 5.4.x
>> Tested-by: Aswath Govindraju <a-govindraju@xxxxxx>
>> Reviewed-by: Aswath Govindraju <a-govindraju@xxxxxx>
>> Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
>> ---
>> drivers/usb/cdns3/gadget.c | 14 ++++++++++++++
>> 1 file changed, 14 insertions(+)
>
>What kernel(s) are you wanting this applied to?
To 5.4. I added information in cc: <stable@xxxxxxxxxxxxxxx> tag (# 5.4.x) .
Is it sufficient or not? I ask because I need to post this fix also to v5.10.
Thanks,
Pawel
>
>thanks,
>
>greg k-h
