[PATCH v4 8/9] md/raid1,raid10: set IO_BLOCKED in case of BLK_STS_P2PDMA

[Mykola Marzhan]

> I think it would be better to
> move the code more towards similarity with raid1 instead of diverging it
> further.

I'll move bio = r10_bio->devs[slot].bio; up into the declaration so
raid10 matches raid1 in v5.

Thank you!