This series addresses issues for the recently added RTW88 USB support reported by Andreas Henriksson and also our customer. The hardware can't handle urbs that have a size of multiple of the bulkout_size (usually 512 bytes). The symptom is that the hardware stalls completely. The issue can be reproduced by sending a suitably sized ping packet from the device: ping -s 394 <somehost> (It's 394 bytes here on a RTL8822CU and RTL8821CU, the actual size may differ on other chips, it was 402 bytes on a RTL8723DU) Other than that qsel was not set correctly. The sympton here is that only one of multiple bulk endpoints was used to send data. Changes since v1: - Use URB_ZERO_PACKET to let the USB host controller handle it automatically rather than working around the issue. Sascha Hauer (3): wifi: rtw88: usb: Set qsel correctly wifi: rtw88: usb: send Zero length packets if necessary wifi: rtw88: usb: drop now unnecessary URB size check drivers/net/wireless/realtek/rtw88/usb.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) -- 2.30.2
