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From:   Pascal Terjan <pterjan@gmail.com>
Date:   Sat, 24 Jun 2023 21:39:15 +0100
Message-ID: <CA+CX+bjcvbtW2Wto1XF1dKcAbpGGisdyHAGHX12v3TchhLbKtg@mail.gmail.com>
Subject: rtsx_usb_sdmmc not detecting card insertion anymore
To:     linux-kernel <linux-kernel@vger.kernel.org>,
        linux-mmc@vger.kernel.org, Ulf Hansson <ulf.hansson@linaro.org>
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Hi,
I have an ASUS PN50 machine with a 0bda:0129 card reader. The card is
not seen unless I reload the rtsx_usb_sdmmc module.

I found a Debian bug report for the same regression
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993068 but nothing
to see there.

Trying to understand things I found
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4dad599b8b5d1ffc5ef12a2edb13d15d537202ba
which seemed related, so I first tried to revert it and that worked.

Assuming the description is correct and the rtsx USB driver runtime
resumes the rtsx_usb_sdmmc device when it detects that a new card has
been inserted, I assume this means it doesn't detect that a card was
inserted and the problem would be in rtsx_usb rather than
rtsx_usb_sdmmc.

I am not sure how to debug this further, usbmon doesn't see anything
when I insert the card.