diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index a226a040647a470cb41ac2f53abbf16bb2bbab80..8c04ceee52d4a72f71a3a3bd328c6ec8fa02ee31 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -913,10 +913,17 @@ static void iscsi_sw_tcp_session_destroy(struct iscsi_cls_session *cls_session) if (WARN_ON_ONCE(session->leadconn)) return; + iscsi_session_remove(cls_session); + /* + * Our get_host_param needs to access the session, so remove the + * host from sysfs before freeing the session to make sure userspace + * is no longer accessing the callout. + */ + iscsi_host_remove(shost); + iscsi_tcp_r2tpool_free(cls_session->dd_data); - iscsi_session_teardown(cls_session); - iscsi_host_remove(shost); + iscsi_session_free(cls_session); iscsi_host_free(shost); } diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 6a622c70514a995b58c3a7e5d622c83b3701b99d..39d5067f804bc22e185b02edefa1f7ebbd3e862e 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -2983,17 +2983,32 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost, } EXPORT_SYMBOL_GPL(iscsi_session_setup); -/** - * iscsi_session_teardown - destroy session, host, and cls_session - * @cls_session: iscsi session +/* + * issi_session_remove - Remove session from iSCSI class. */ -void iscsi_session_teardown(struct iscsi_cls_session *cls_session) +void iscsi_session_remove(struct iscsi_cls_session *cls_session) { struct iscsi_session *session = cls_session->dd_data; - struct module *owner = cls_session->transport->owner; struct Scsi_Host *shost = session->host; iscsi_remove_session(cls_session); + /* + * host removal only has to wait for its children to be removed from + * sysfs, and iscsi_tcp needs to do iscsi_host_remove before freeing + * the session, so drop the session count here. + */ + iscsi_host_dec_session_cnt(shost); +} +EXPORT_SYMBOL_GPL(iscsi_session_remove); + +/** + * iscsi_session_free - Free iscsi session and it's resources + * @cls_session: iscsi session + */ +void iscsi_session_free(struct iscsi_cls_session *cls_session) +{ + struct iscsi_session *session = cls_session->dd_data; + struct module *owner = cls_session->transport->owner; iscsi_pool_free(&session->cmdpool); kfree(session->password); @@ -3011,10 +3026,19 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) kfree(session->discovery_parent_type); iscsi_free_session(cls_session); - - iscsi_host_dec_session_cnt(shost); module_put(owner); } +EXPORT_SYMBOL_GPL(iscsi_session_free); + +/** + * iscsi_session_teardown - destroy session and cls_session + * @cls_session: iscsi session + */ +void iscsi_session_teardown(struct iscsi_cls_session *cls_session) +{ + iscsi_session_remove(cls_session); + iscsi_session_free(cls_session); +} EXPORT_SYMBOL_GPL(iscsi_session_teardown); /** diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index 881e4762d626b4f9547bb69adbf297967a1aac07..fb7c5f82dcf33c98f5a423e0cad60f3324e60f80 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -404,6 +404,8 @@ extern int iscsi_host_get_max_scsi_cmds(struct Scsi_Host *shost, extern struct iscsi_cls_session * iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost, uint16_t, int, int, uint32_t, unsigned int); +void iscsi_session_remove(struct iscsi_cls_session *cls_session); +void iscsi_session_free(struct iscsi_cls_session *cls_session); extern void iscsi_session_teardown(struct iscsi_cls_session *); extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *); extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn,