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From:   Artem Makhutov <artem.makhutov@gmail.com>
Date:   Thu, 27 Apr 2023 23:28:20 +0200
Message-ID: <CALbLcfCYO2Uk91Mq6FW1UCx4j8RiK1Hpy-1VU6wb9tipBi74Fw@mail.gmail.com>
Subject: Re: RTL8188EU (LogiLink WL0151A) - Malformed packets
To:     Bitterblue Smith <rtl8821cerfe2@gmail.com>
Cc:     "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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Hi,

> I had another idea. Does this help?

No, unfortunately not. The packet size is now different and the
difference is now 12 bytes instead of 4 like before:
[   95.519092] urb_len 1544  pkt_cnt 136 pkt_len 1488 drvinfo_sz 32
desc_shift 0 rxmcs 13 rxht 1 paggr 1 faggr 1
[   96.565095] urb_len 1544  pkt_cnt 136 pkt_len 1488 drvinfo_sz 32
desc_shift 0 rxmcs 12 rxht 1 paggr 1 faggr 1
[   96.567223] urb_len 1556  pkt_cnt 136 pkt_len 1500 drvinfo_sz 32
desc_shift 0 rxmcs 4 rxht 0 paggr 0 faggr 0
[   97.600101] urb_len 1556  pkt_cnt 136 pkt_len 1500 drvinfo_sz 32
desc_shift 0 rxmcs 4 rxht 0 paggr 0 faggr 0
[...]
[  129.872096] urb_len 1556  pkt_cnt 136 pkt_len 1500 drvinfo_sz 32
desc_shift 0 rxmcs 4 rxht 0 paggr 0 faggr 0
[  129.879972] urb_len 1556  pkt_cnt 136 pkt_len 1500 drvinfo_sz 32
desc_shift 0 rxmcs 4 rxht 0 paggr 0 faggr 0
[  130.870341] urb_len 1544  pkt_cnt 136 pkt_len 1488 drvinfo_sz 32
desc_shift 0 rxmcs 12 rxht 1 paggr 1 faggr 1
[  131.919967] urb_len 1544  pkt_cnt 136 pkt_len 1488 drvinfo_sz 32
desc_shift 0 rxmcs 12 rxht 1 paggr 1 faggr 1

This time I have much less packet loss as I can only see rxmcs 13 as
max in my logs. Mostly ht mode is not in use for some reasons:
256 packets transmitted, 235 received, 8.20312% packet loss, time 256218ms

Without the patch I was getting 88% packet loss...

And the curious is why were rxmcs 17 and rxmcs 19 working and the rest
not (in my previous tests)?