Re: mmc-utils: ioctl connection timed out with SD cards

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

Hello, Christian.

On Tuesday, 04 April 2023 at 08:14, Christian Löhle wrote:
> > 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
> 
> Could you try something like
> sudo dd if=/dev/mmcblk0 of=/dev/null count=1 iflag=direct; sudo mmc status get /dev/mmcblk0
> just to rule out anything in the autosuspend direction?

I did, same error:
$ sudo dd if=/dev/mmcblk0 of=/dev/null count=1 iflag=direct; sudo mmc status get /dev/mmcblk0
1+0 records in
1+0 records out
512 bytes copied, 0.000832209 s, 615 kB/s
ioctl: Connection timed out
Could not read response to SEND_STATUS from /dev/mmcblk0

And there's a corresponding
[ 3540.312203] rtsx_pci_sdmmc rtsx_pci_sdmmc.0: __mmc_blk_ioctl_cmd: cmd error -110
in dmesg.

This is on a third machine, a Dell laptop (though the SD card reader is
driven by the same rtsx_pci_sdmmc driver as in the Sony case).

Regards,
Dominik
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