Hello, Mark. Mark Lord wrote: >> libata doesn't really put much restrictions on what a LLD should do on >> entering EH and if the controller's behavior is predictable, there's no >> reason to freeze the port. If the problem is that the DMA engine isn't >> usable after PMP error but it's known that the controller isn't gonna >> cause irq storm, no need to freeze. The only command EH issues before >> resetting which can use DMA protocol is READ_LOG_EXT. Maybe there needs >> to be a way to force PIO protocol for READ_LOG_EXT. Other than that, if >> no-data and PIO-only commands work fine, EH autopsy should work fine. > .. > > Eh? READ LOG EXT *is* a PIO command, as opposed to READ LOG DMA EXT > which uses DMA. Ah.. right. My bad. > And the EH also issues PIO READ_BUFFER commands for PM ports, if a PM is > present. Hmmmm.... Where? -- tejun - 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
