Don't embed ap inside shost. Allocate it separately and point it back
from shosts's hostdata. This makes port allocation more flexible and
allows regular ATA and SAS share host alloc/init paths.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/ata/libata-core.c | 19 ++++++++++++++-----
include/linux/libata.h | 2 +-
2 files changed, 15 insertions(+), 6 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 735f0b0..542e9ea 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5782,13 +5782,18 @@ static struct ata_port * ata_port_add(const struct ata_probe_ent *ent,
return NULL;
}
- shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
- if (!shost)
+ ap = kzalloc(sizeof(struct ata_port), GFP_KERNEL);
+ if (!ap)
return NULL;
- shost->transportt = &ata_scsi_transport_template;
+ shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port *));
+ if (!shost) {
+ kfree(ap);
+ return NULL;
+ }
- ap = ata_shost_to_port(shost);
+ *(struct ata_port **)&shost->hostdata[0] = ap;
+ shost->transportt = &ata_scsi_transport_template;
ata_port_init(ap, host, ent, port_no);
ata_port_init_shost(ap, shost);
@@ -5814,9 +5819,13 @@ static void ata_host_release(struct device *gendev, void *res)
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
- if (ap)
+ if (!ap)
+ continue;
+
+ if (ap->scsi_host)
scsi_host_put(ap->scsi_host);
+ kfree(ap);
host->ports[i] = NULL;
}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 12237d4..ced9dd5 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1231,7 +1231,7 @@ static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
{
- return (struct ata_port *) &host->hostdata[0];
+ return *(struct ata_port **)&host->hostdata[0];
}
#endif /* __LINUX_LIBATA_H__ */
--
1.5.0.3
-
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