mmc-utils: ioctl connection timed out with SD cards

[Dominik 'Rathann' Mierzejewski <dominik@greysector.net>]

Hello,
is the mmc tool from mmc-utils supposed to work with SD cards?
I tried mmc status get /dev/mmcblkN with three different SD cards
on two different machines (Pinebook Pro and a Sony laptop) and I get
the same error on both:
# mmc status get /dev/mmcblk0
ioctl: Connection timed out
Could not read response to SEND_STATUS from /dev/mmcblk0

dmesg on the Sony machine shows:
[ 1291.196547] mmc0: new SD card at address aaaa
[ 1291.196834] mmcblk0: mmc0:aaaa SD01G 969 MiB 
[ 1291.200263]  mmcblk0: p1 p2 p3
[ 1306.273160] rtsx_pci_sdmmc rtsx_pci_sdmmc.0: __mmc_blk_ioctl_cmd: cmd error -110
[ 1306.276978]  mmcblk0: p1 p2 p3

I'm able to get status of the internal eMMC device on Pinebook Pro
with no errors. extcsd read works fine, too.

I'm running Fedora 38 with kernel 6.2.9 on both machines if that helps.

Regards,
Dominik
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