ata: libata: Assign print_id at port allocation time

While the assignment of ap->print_id could have been moved to
ata_host_alloc(), let's simply move it to ata_port_alloc().

If you allocate a port, you want to give it a unique name that can be used
for printing.

By moving the ap->print_id assignment to ata_port_alloc(), means that we
can also remove the ap->print_id assignment from ata_sas_port_alloc().

This will allow a LLD to use the ata_port_*() print functions before
ata_host_register() has been called.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-17-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>

Author: floatious

drivers/ata/libata-core.c

@@ -5470,7 +5470,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
 	ap->lock = &host->lock;
-	ap->print_id = -1;
+	ap->print_id = atomic_inc_return(&ata_print_id);
 	ap->host = host;
 	ap->dev = host->dev;
 
@@ -5907,10 +5907,6 @@ int ata_host_register(struct ata_host *host, const struct scsi_host_template *sh
 		return -EINVAL;
 	}
 
-	/* give ports names and add SCSI hosts */
-	for (i = 0; i < host->n_ports; i++)
-		host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
-
 	/* Create associated sysfs transport objects  */
 	for (i = 0; i < host->n_ports; i++) {
 		rc = ata_tport_add(host->dev,host->ports[i]);

drivers/ata/libata-sata.c

@@ -1234,7 +1234,6 @@ struct ata_port *ata_sas_port_alloc(struct ata_host *host,
 	ap->flags |= port_info->flags;
 	ap->ops = port_info->port_ops;
 	ap->cbl = ATA_CBL_SATA;
-	ap->print_id = atomic_inc_return(&ata_print_id);
 
 	return ap;
 }

drivers/ata/libata.h

@@ -32,7 +32,6 @@ enum {
 
 #define ATA_PORT_TYPE_NAME	"ata_port"
 
-extern atomic_t ata_print_id;
 extern int atapi_passthru16;
 extern int libata_fua;
 extern int libata_noacpi;