sd_read_data: not in Sending-Data state (state=4)

[Loïc Minier]

Hey

When booting a Linaro headless alpha 2 image from 11.05 cycle, I get a lot of these on the console:
sd_read_data: not in Sending-Data state (state=4)

would be nice not to get them, either by implementing this support or by quieting the warnings if this is what the hardware does too.

Cheers,

[Peter Maydell (pmaydell)]

This turns out to be a bug in QEMU's SDcard model where it was not correctly changing from 'transfer' to 'sending data' state when Linux sent it an SD_STATUS command. On OMAP3 the effect is that you get these warnings and read zeroes; on PL18x (versatile/vexpress/etc) the effect is that the Linux driver never sees any data and the MMC card is not detected.

The fix is two lines, so I'll put together a patch to send upstream.

[Peter Maydell (pmaydell)]

Fix for this submitted upstream:
http://patchwork.ozlabs.org/patch/83594/

In the unlikely event it doesn't get into upstream by then, I'll put it in qemu-linaro for 2011.03.

[Peter Maydell (pmaydell)]

Fixed in qemu-linaro tree and also committed upstream. Will go into 2011.03.