From 6f63caae2172e97e528b58319480217b0b36542e Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 26 Jan 2007 14:08:43 -0800 Subject: [SCSI] libsas: Clean up discovery failure handler code sas_rphy_delete does two things: it removes the sas_rphy from the transport layer and frees the sas_rphy. This can be broken down into two functions, sas_rphy_remove and sas_rphy_free; sas_rphy_remove is of interest to sas_discover_root_expander because it calls functions that require sas_rphy_add as a prerequisite and can fail (namely sas_discover_expander). In that case, sas_discover_root_expander needs to be able to undo the effects of sas_rphy_add yet leave the job of freeing the sas_rphy to the caller of sas_discover_root_expander. This patch also removes some unnecessary code from sas_discover_end_dev to eliminate an unnecessary cycle of sas_notify_lldd_gone/found for SAS devices, thus eliminating a sas_rphy_remove call (and fixing a race condition where a SCSI target scan can come in between the gone and found call). It also moves the sas_rphy_free calls into sas_discover_domain and sas_ex_discover_end_dev to complement the sas_rphy_allocation via sas_get_port_device. This patch does not change the semantics of sas_rphy_delete. Signed-off-by: Darrick J. Wong Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_expander.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/scsi/libsas/sas_expander.c') diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 0dfd97e7e96c..d9b9a008d36d 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -667,6 +667,8 @@ static struct domain_device *sas_ex_discover_end_dev( return child; out_list_del: + sas_rphy_free(child->rphy); + child->rphy = NULL; list_del(&child->dev_list_node); out_free: sas_port_delete(phy->port); @@ -1444,12 +1446,8 @@ int sas_discover_root_expander(struct domain_device *dev) return res; out_err2: - sas_rphy_delete(dev->rphy); - dev->rphy = NULL; - return res; + sas_rphy_remove(dev->rphy); out_err: - sas_rphy_free(dev->rphy); - dev->rphy = NULL; return res; } -- cgit v1.2.3