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[v2,0/3] wifi: rtw88: USB fixes

Message ID 20230210111632.1985205-1-s.hauer@pengutronix.de
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Series wifi: rtw88: USB fixes | expand

Message

Sascha Hauer Feb. 10, 2023, 11:16 a.m. UTC 
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(-)