Hello, This is part of patchset series described in [T]. This is the fifth take of add-hotplug-support patchset. Changes from the last take[L] are. * ata_scsi_hotplug() requeue condition check has been updated such that SCSI devices are guaranteed to be attached to ATA devices. No race window anymore. * boot probing reimplemented using ata_port_wait_eh(). * ata_port_detach() reimplemented using ata_port_wait_eh(). New implementation is much more robust and survives PCI unplugging under all circumstances. EH part of unloading is also reimplemented in simpler and more robust way. * UNLOADING check added to ata_scsi_hotplug(). hotplug task flushing is reliable now. * s/FIS34/D2H FIS/g One thing to note about unload handling is that, if EH is scheduled after ata_port_detach() is complete but before SCSI host is actually released, it can oops accessing ap->host_set. The problem is that, as SCSI doesn't supply host release callback, host_set is released before all ports are released. However, this condition is unlikely to occur - to trigger the bug, either the driver has to schedule EH while frozen during that window, or the user has to hold reference to scan/delete node and issue warm plug request, again, during the window. This patchset is against upstream (ef2824073fba9def3cf122e89cc485f66dd71f70) + [1] set-PIO-0-after-successful-EH-reset + [2] shift-host-flag-constants + [3] implement-ata_eh_wait + [4] prep-for-hotplug-support patchset + [5] prep-LLDDs-for-hotplug-support patchset Thanks. -- tejun [T] http://article.gmane.org/gmane.linux.ide/11012 [L] http://article.gmane.org/gmane.linux.ide/10892 [1] http://article.gmane.org/gmane.linux.ide/10890 [2] http://article.gmane.org/gmane.linux.ide/11010 [3] http://article.gmane.org/gmane.linux.ide/11011 [4] http://article.gmane.org/gmane.linux.ide/11014 [5] http://article.gmane.org/gmane.linux.ide/11028 - : 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
