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[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>
This commit is contained in:
James Bottomley 2006-06-12 09:09:18 -05:00 committed by James Bottomley
parent 8d7feac3c7
commit c5943d36ae
1 changed files with 14 additions and 0 deletions
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14
drivers/scsi/scsi_transport_sas.c
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@ -747,6 +747,18 @@ static void sas_end_device_release(struct device *dev)
kfree(edev);
}
/**
* 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
*
@ -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;