Implement ata_all_ports list. All active ata_ports are linked on this
list. This will be used to dynamically modify libata-wide
configurations.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/scsi/libata-core.c | 13 +++++++++++++
include/linux/libata.h | 2 ++
2 files changed, 15 insertions(+), 0 deletions(-)
a962488760934f639dd202793694339afd2db1cf
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 61db4f5..1477d32 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -70,6 +70,9 @@ static unsigned int ata_dev_init_params(
static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
static void ata_dev_xfermask(struct ata_device *dev);
+static DEFINE_MUTEX(ata_all_ports_mutex);
+static LIST_HEAD(ata_all_ports);
+
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
@@ -5464,6 +5467,11 @@ int ata_device_add(const struct ata_prob
ap = host_set->ports[i];
+ /* this port is active now, add it to all_ports */
+ mutex_lock(&ata_all_ports_mutex);
+ list_add_tail(&ap->all_ports_entry, &ata_all_ports);
+ mutex_unlock(&ata_all_ports_mutex);
+
/* init sata_spd_limit to the current value */
if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
int spd = (scontrol >> 4) & 0xf;
@@ -5594,6 +5602,11 @@ void ata_port_detach(struct ata_port *ap
cancel_delayed_work(&ap->hotplug_task);
flush_workqueue(ata_aux_wq);
+ /* this port is dead now, remove from all_ports */
+ mutex_lock(&ata_all_ports_mutex);
+ list_del_init(&ap->all_ports_entry);
+ mutex_unlock(&ata_all_ports_mutex);
+
/* remove the associated SCSI host */
scsi_remove_host(ap->host);
}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 66c3100..c9ed035 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -555,6 +555,8 @@ struct ata_port {
pm_message_t pm_mesg;
int *pm_result;
+ struct list_head all_ports_entry;
+
void *private_data;
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
--
1.3.2
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