libata-acpi: clean up ata_acpi_exec_tfs()
This patch cleans up ata_acpi_exec_tfs() and its friends.
* Rename taskfile_array to ata_acpi_gtf and make it __packed as it's
used as argument to ACPI method, and use pointer to ata_acpi_gtf and
number of taskfiles to represent _GTF taskfiles instead of a pointer
casted into unsigned long and byte count. This makes argument
re-checking in do_drive_set_taskfiles() unnecessary.
* Pointer in void * not in unsigned long.
* Clean up do_drive_get_GTF() error handling and make
do_drive_get_GTF() return number of taskfiles on success, 0 if _GTF
doesn't exist or doesn't contain valid ata. -errno on other errors.
* Remove superflous check for acpi->buffer.pointer.
* Update taskfile_load_raw() such that printed messages look similar
to the messages printed by ata_eh_report().
* s/do_drive_get_GTF/ata_dev_get_GTF/
s/do_drive_set_taskfiles/ata_dev_set_taskfiles/
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1 file changed