libata: kill ata_noop_dev_select()

Now that SFF assumptions are separated out from non-SFF reset
sequence, port_ops->sff_dev_select() is no longer necessary for
non-SFF controllers.  Kill ata_noop_dev_select() and ->sff_dev_select
initialization from base and other non-SFF port_ops.
Signed-off-by: NTejun Heo <htejun@gmail.com>

drivers/ata/libata-core.c

@@ -84,7 +84,6 @@ const struct ata_port_operations sata_port_ops = {
 
 	.qc_defer		= ata_std_qc_defer,
 	.hardreset		= sata_std_hardreset,
-	.sff_dev_select		= ata_noop_dev_select,
 };
 
 const struct ata_port_operations sata_pmp_port_ops = {
@@ -1431,22 +1430,6 @@ static int ata_hpa_resize(struct ata_device *dev)
 	return 0;
 }
 
-/**
- *	ata_noop_dev_select - Select device 0/1 on ATA bus
- *	@ap: ATA channel to manipulate
- *	@device: ATA device (numbered from zero) to select
- *
- *	This function performs no actual function.
- *
- *	May be used as the dev_select() entry in ata_port_operations.
- *
- *	LOCKING:
- *	caller.
- */
-void ata_noop_dev_select(struct ata_port *ap, unsigned int device)
-{
-}
-
 /**
  *	ata_dump_id - IDENTIFY DEVICE info debugging output
  *	@id: IDENTIFY DEVICE page to dump
@@ -6193,7 +6176,6 @@ static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
 struct ata_port_operations ata_dummy_port_ops = {
 	.sff_check_status	= ata_dummy_check_status,
 	.sff_check_altstatus	= ata_dummy_check_status,
-	.sff_dev_select		= ata_noop_dev_select,
 	.qc_prep		= ata_noop_qc_prep,
 	.qc_issue		= ata_dummy_qc_issue,
 	.freeze			= ata_dummy_noret,
@@ -6234,7 +6216,6 @@ EXPORT_SYMBOL_GPL(ata_host_detach);
 EXPORT_SYMBOL_GPL(ata_sg_init);
 EXPORT_SYMBOL_GPL(ata_qc_complete);
 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
-EXPORT_SYMBOL_GPL(ata_noop_dev_select);
 EXPORT_SYMBOL_GPL(sata_print_link_status);
 EXPORT_SYMBOL_GPL(atapi_cmd_type);
 EXPORT_SYMBOL_GPL(ata_tf_to_fis);

drivers/scsi/ipr.c

@@ -5247,7 +5247,6 @@ static bool ipr_qc_fill_rtf(struct ata_queued_cmd *qc)
 }
 
 static struct ata_port_operations ipr_sata_ops = {
-	.sff_dev_select = ata_noop_dev_select,
 	.phy_reset = ipr_ata_phy_reset,
 	.hardreset = ipr_sata_reset,
 	.post_internal_cmd = ipr_ata_post_internal,

drivers/scsi/libsas/sas_ata.c

@@ -344,7 +344,6 @@ static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
 }
 
 static struct ata_port_operations sas_sata_ops = {
-	.sff_dev_select		= ata_noop_dev_select,
 	.phy_reset		= sas_ata_phy_reset,
 	.post_internal_cmd	= sas_ata_post_internal,
 	.qc_prep		= ata_noop_qc_prep,

include/linux/libata.h

@@ -911,7 +911,6 @@ extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
 extern const char *ata_mode_string(unsigned long xfer_mask);
 extern unsigned long ata_id_xfermask(const u16 *id);
-extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
 extern int ata_port_start(struct ata_port *ap);
 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);