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authorJames Bottomley <James.Bottomley@steeleye.com>2006-06-12 09:09:18 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-06-12 10:38:51 -0500
commitc5943d36aebb79589ac3983eec418bbeca897573 (patch)
tree6412182aab9b3f97e2163346cfc6c0a04af70be3 /drivers/scsi/scsi_transport_sas.c
parent8d7feac3c7504425aaf61dc7d804685a6b89ee43 (diff)
[SCSI] scsi_transport_sas: fix panic in sas_free_rphy
This is a hold over from the end device/expander conversion. Apparently the rphy list pointer is never initialised, so list_del() on the uninitialised pointer can panic the system Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_transport_sas.c')
-rw-r--r--drivers/scsi/scsi_transport_sas.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index 6da6721eb0db..1fe6b2d01853 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -748,6 +748,18 @@ static void sas_end_device_release(struct device *dev)
}
/**
+ * sas_rphy_initialize - common rphy intialization
+ * @rphy: rphy to initialise
+ *
+ * Used by both sas_end_device_alloc() and sas_expander_alloc() to
+ * initialise the common rphy component of each.
+ */
+static void sas_rphy_initialize(struct sas_rphy *rphy)
+{
+ INIT_LIST_HEAD(&rphy->list);
+}
+
+/**
* sas_end_device_alloc - allocate an rphy for an end device
*
* Allocates an SAS remote PHY structure, connected to @parent.
@@ -771,6 +783,7 @@ struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent)
sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d-%d",
shost->host_no, parent->port_identifier, parent->number);
rdev->rphy.identify.device_type = SAS_END_DEVICE;
+ sas_rphy_initialize(&rdev->rphy);
transport_setup_device(&rdev->rphy.dev);
return &rdev->rphy;
@@ -809,6 +822,7 @@ struct sas_rphy *sas_expander_alloc(struct sas_phy *parent,
sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d",
shost->host_no, rdev->rphy.scsi_target_id);
rdev->rphy.identify.device_type = type;
+ sas_rphy_initialize(&rdev->rphy);
transport_setup_device(&rdev->rphy.dev);
return &rdev->rphy;