Hello James, Am 25.07.2012 21:55, schrieb James Bottomley:> > It looks like a hack like this might be needed. > > James > <SNIP> I don't yet understand all the code but I'm following your discussion with Tejun: I've set up a minimal vm running gentoo with a mpt2sas driven controller in passthrough mode. I've applied your proposed patch against the vanilla 3.5.0 kernel (which includes Tejun's commit), and I'm happy to report the problem does seem to get fixed by it. Well at least sending the sata drive in standby using 'hdparm -y' now works (according to 'hdparm -C') without these nasty i/o errors on later i/o. That is to say the drive wakes up again (e.g. from a 'fdisk -l /dev/sda' command) and returns data. -- Matthias -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
