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* libata-transport.c: local functions should not be exposed globallyH Hartley Sweeten2012-07-25
| | | | | | | | | | | | | | Functions not referenced outside of a source file should be marked static to prevent it from being exposed globally. This quiets the sparse warnings: warning: symbol 'ata_is_port' was not declared. Should it be static? warning: symbol 'ata_is_link' was not declared. Should it be static? warning: symbol 'ata_is_ata_dev' was not declared. Should it be static? Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: forbid port runtime pm by default, fixing regressionLin Ming2012-04-18
| | | | | | | | | | Forbid port runtime pm by default because it has known hotplug issue. User can allow it by, for example echo auto > /sys/devices/pci0000:00/0000:00:1f.2/ata2/power/control Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] enable ata port async suspendLin Ming2012-01-17
| | | | | | | | | | | | | | | | | | | | | | | | This saves devices suspend/resume time. Tested system suspend/resume with SATA IDE/AHCI mode 3 times. Below is the time took for devices suspend/resume. SATA mode vanilla-kernel patched-kernel --------- --------------------- --------------------- IDE suspend: 0.744 suspend: 0.432 (0.716, 0.768, 0.748) (0.440, 0.428, 0.428) resume: 5.084 resume: 2.209 (5.100, 5.064, 5.088) (2.168, 2.232, 2.228) AHCI: suspend: 0.725 suspend: 0.449 (0.740, 0.708, 0.728) (0.456, 0.448, 0.444) resume: 2.556 resume: 1.896 (2.604, 2.492, 2.572) (1.932, 1.872, 1.884) Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: add ata port runtime PM callbacksLin Ming2012-01-08
| | | | | | | | | | Add ata port runtime suspend/resume/idle callbacks. Set ->eh_noresume to skip the runtime PM calls on scsi host in the error handler to avoid dead lock. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: add ata port system PM callbacksLin Ming2012-01-08
| | | | | | | | | | Change ata_host_request_pm to ata_port_request_pm which performs port suspend/resume. Add ata port type driver which implements port PM callbacks. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* drivers/ata/libata-transport.c: include linux/slab.hJeff Garzik2010-10-21
| | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] Add ATA transport classGwendal Grignou2010-10-21
This is a scheleton for libata transport class. All information is read only, exporting information from libata: - ata_port class: one per ATA port - ata_link class: one per ATA port or 15 for SATA Port Multiplier - ata_device class: up to 2 for PATA link, usually one for SATA. Signed-off-by: Gwendal Grignou <gwendal@google.com> Reviewed-by: Grant Grundler <grundler@google.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>