This patch series is primarily ACPI objects support for SATA/PATA. It applies to 2.6.16-rc4. ACPI objects for SATA/PATA add support for the _GTF, _SDD, _GTM, and _STM ACPI methods. ACPI methods are used to: PATA: get and set channel timings and modes and taskfiles SATA: get and set drive data and taskfiles Taskfile operations are not limited. Examples that I have seen are (not limited to): - power management: . enable or disable drive-initiated power management - performance: . enable drive cache; set transfer mode (PIO/DMA) - security . lock the disk access password There is also an addition here to send a Standby Immediate command to SATA/PATA drives during shutdown. This should be done (at least for some drives) to cause a safe and orderly shutdown of the drive heads (i.e., protect data). Caveat: Some people are reporting good results from these patches. Unfortunately I have problems with them myself. My test platforms usually suspend successfully but they don't resume successfully. Oh, and there may be a BUG during sleep-shutdown processing where a sleep happens while a spinlock is held. These patches definitely need some time in -mm, but be prepared to revert them or to use libata.noacpi=1 to disable them. Also, please use libata.printk=0xff to enable full debug messages. If you want to test this without using -mm, you can either apply the patch series (13 patches) or one rolled-up (combined) patch. The combined patch is available at: http://www.xenotime.net/linux/SATA/2.6.16-rc4/libata-rollup-2616-rc4.patch Still TBD: more calls to ata_acpi_push_timing(), e.g., during resume, to set PATA hard drive timing and mode. And fix the BUG above. --- ~Randy - : 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
