diff options
| author | Chaohai Chen <wdhh6@aliyun.com> | 2025-12-06 14:06:16 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-12-08 22:08:31 -0500 |
| commit | 362432e9b9aefb914ab7d9f86c9fc384a6620c41 (patch) | |
| tree | e35d3be4b364e5484046d2eeaa110e81d205b605 | |
| parent | fd81bc5cca8fc6936a8988de6b5d4c5693b6587e (diff) | |
scsi: libsas: Add rollback handling when an error occurs
In sas_register_phys(), if an error is triggered in the loop process, we
need to roll back the resources that have already been requested.
Add sas_unregister_phys() when an error occurs in sas_register_ha().
[mkp: a few coding style tweaks and address John's comment]
Signed-off-by: Chaohai Chen <wdhh6@aliyun.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20251206060616.69216-1-wdhh6@aliyun.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/libsas/sas_init.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_internal.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_phy.c | 33 |
3 files changed, 32 insertions, 3 deletions
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index 8566bb1208a0..6b15ad1bcada 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -141,6 +141,7 @@ Undo_event_q: Undo_ports: sas_unregister_ports(sas_ha); Undo_phys: + sas_unregister_phys(sas_ha); return error; } diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index da5408c701cd..d104c87f04f5 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -54,6 +54,7 @@ void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev); void sas_scsi_recover_host(struct Scsi_Host *shost); int sas_register_phys(struct sas_ha_struct *sas_ha); +void sas_unregister_phys(struct sas_ha_struct *sas_ha); struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy, gfp_t gfp_flags); void sas_free_event(struct asd_sas_event *event); diff --git a/drivers/scsi/libsas/sas_phy.c b/drivers/scsi/libsas/sas_phy.c index 635835c28ecd..58f08dc2c187 100644 --- a/drivers/scsi/libsas/sas_phy.c +++ b/drivers/scsi/libsas/sas_phy.c @@ -116,6 +116,7 @@ static void sas_phye_shutdown(struct work_struct *work) int sas_register_phys(struct sas_ha_struct *sas_ha) { int i; + int err; /* Now register the phys. */ for (i = 0; i < sas_ha->num_phys; i++) { @@ -132,8 +133,10 @@ int sas_register_phys(struct sas_ha_struct *sas_ha) phy->frame_rcvd_size = 0; phy->phy = sas_phy_alloc(&sas_ha->shost->shost_gendev, i); - if (!phy->phy) - return -ENOMEM; + if (!phy->phy) { + err = -ENOMEM; + goto rollback; + } phy->phy->identify.initiator_port_protocols = phy->iproto; @@ -146,10 +149,34 @@ int sas_register_phys(struct sas_ha_struct *sas_ha) phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN; phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; - sas_phy_add(phy->phy); + err = sas_phy_add(phy->phy); + if (err) { + sas_phy_free(phy->phy); + goto rollback; + } } return 0; +rollback: + for (i-- ; i >= 0 ; i--) { + struct asd_sas_phy *phy = sas_ha->sas_phy[i]; + + sas_phy_delete(phy->phy); + sas_phy_free(phy->phy); + } + return err; +} + +void sas_unregister_phys(struct sas_ha_struct *sas_ha) +{ + int i; + + for (i = 0 ; i < sas_ha->num_phys ; i++) { + struct asd_sas_phy *phy = sas_ha->sas_phy[i]; + + sas_phy_delete(phy->phy); + sas_phy_free(phy->phy); + } } const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = { |