diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 21 | ||||
| -rw-r--r-- | drivers/ieee1394/sbp2.h | 9 |
2 files changed, 19 insertions, 11 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index 3cb6b479b2e..017259cc34f 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -478,7 +478,7 @@ static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id, * There is a small window after a bus reset within which the node * entry's generation is current but the reconnect wasn't completed. */ - if (atomic_read(&scsi_id->unfinished_reset)) + if (unlikely(atomic_read(&scsi_id->state) == SBP2LU_STATE_IN_RESET)) return; if (hpsb_node_write(scsi_id->ne, @@ -489,7 +489,7 @@ static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id, * Now accept new SCSI commands, unless a bus reset happended during * hpsb_node_write. */ - if (!atomic_read(&scsi_id->unfinished_reset)) + if (likely(atomic_read(&scsi_id->state) != SBP2LU_STATE_IN_RESET)) scsi_unblock_requests(scsi_id->scsi_host); } @@ -756,7 +756,7 @@ static int sbp2_remove(struct device *dev) sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); /* scsi_remove_device() will trigger shutdown functions of SCSI * highlevel drivers which would deadlock if blocked. */ - atomic_set(&scsi_id->unfinished_reset, 0); + atomic_set(&scsi_id->state, SBP2LU_STATE_IN_SHUTDOWN); scsi_unblock_requests(scsi_id->scsi_host); } sdev = scsi_id->sdev; @@ -811,7 +811,7 @@ static int sbp2_update(struct unit_directory *ud) /* Accept new commands unless there was another bus reset in the * meantime. */ if (hpsb_node_entry_valid(scsi_id->ne)) { - atomic_set(&scsi_id->unfinished_reset, 0); + atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); scsi_unblock_requests(scsi_id->scsi_host); } return 0; @@ -842,7 +842,7 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); INIT_LIST_HEAD(&scsi_id->scsi_list); spin_lock_init(&scsi_id->sbp2_command_orb_lock); - atomic_set(&scsi_id->unfinished_reset, 0); + atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); INIT_WORK(&scsi_id->protocol_work, NULL, NULL); ud->device.driver_data = scsi_id; @@ -926,13 +926,14 @@ static void sbp2_host_reset(struct hpsb_host *host) struct scsi_id_instance_data *scsi_id; hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - - if (hi) { - list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) { - atomic_set(&scsi_id->unfinished_reset, 1); + if (!hi) + return; + list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) + if (likely(atomic_read(&scsi_id->state) != + SBP2LU_STATE_IN_SHUTDOWN)) { + atomic_set(&scsi_id->state, SBP2LU_STATE_IN_RESET); scsi_block_requests(scsi_id->scsi_host); } - } } /* diff --git a/drivers/ieee1394/sbp2.h b/drivers/ieee1394/sbp2.h index 34c52bf4fa3..abbe48e646c 100644 --- a/drivers/ieee1394/sbp2.h +++ b/drivers/ieee1394/sbp2.h @@ -347,10 +347,17 @@ struct scsi_id_instance_data { /* Device specific workarounds/brokeness */ unsigned workarounds; - atomic_t unfinished_reset; + atomic_t state; struct work_struct protocol_work; }; +/* For use in scsi_id_instance_data.state */ +enum sbp2lu_state_types { + SBP2LU_STATE_RUNNING, /* all normal */ + SBP2LU_STATE_IN_RESET, /* between bus reset and reconnect */ + SBP2LU_STATE_IN_SHUTDOWN /* when sbp2_remove was called */ +}; + /* Sbp2 host data structure (one per IEEE1394 host) */ struct sbp2scsi_host_info { struct hpsb_host *host; /* IEEE1394 host */ |