firewire: Allocate scsi_host up front and allocate the sbp2_device as hostdata.
Avoids an extra allocation and simplifies lifetime rules for the scsi_host. Signed-off-by: Kristian Hoegsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg
Stefan Richter
parent
1e4c7b0dab
commit
ad85274fb7
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@ -74,7 +74,6 @@ struct sbp2_device {
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int retries;
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struct delayed_work work;
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struct Scsi_Host *scsi_host;
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};
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#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
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@ -519,30 +518,32 @@ static int sbp2_agent_reset(struct fw_unit *unit)
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return 0;
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}
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static int add_scsi_devices(struct fw_unit *unit);
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static void remove_scsi_devices(struct fw_unit *unit);
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static void sbp2_reconnect(struct work_struct *work);
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static struct scsi_host_template scsi_driver_template;
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static void
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release_sbp2_device(struct kref *kref)
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{
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struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref);
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struct Scsi_Host *host =
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container_of((void *)sd, struct Scsi_Host, hostdata[0]);
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sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation,
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SBP2_LOGOUT_REQUEST, sd->login_id, NULL);
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remove_scsi_devices(sd->unit);
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scsi_remove_host(host);
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fw_core_remove_address_handler(&sd->address_handler);
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fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id);
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put_device(&sd->unit->device);
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kfree(sd);
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scsi_host_put(host);
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}
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static void sbp2_login(struct work_struct *work)
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{
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struct sbp2_device *sd =
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container_of(work, struct sbp2_device, work.work);
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struct Scsi_Host *host =
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container_of((void *)sd, struct Scsi_Host, hostdata[0]);
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struct fw_unit *unit = sd->unit;
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struct fw_device *device = fw_device(unit->device.parent);
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struct sbp2_login_response response;
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@ -562,7 +563,6 @@ static void sbp2_login(struct work_struct *work)
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} else {
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fw_error("failed to login to %s\n",
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unit->device.bus_id);
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remove_scsi_devices(unit);
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kref_put(&sd->kref, release_sbp2_device);
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}
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return;
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@ -595,7 +595,9 @@ static void sbp2_login(struct work_struct *work)
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PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect);
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sbp2_agent_reset(unit);
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retval = add_scsi_devices(unit);
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/* FIXME: Loop over luns here. */
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lun = 0;
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retval = scsi_add_device(host, 0, 0, lun);
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if (retval < 0) {
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sbp2_send_management_orb(unit, sd->node_id, sd->generation,
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SBP2_LOGOUT_REQUEST, sd->login_id,
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@ -615,13 +617,16 @@ static int sbp2_probe(struct device *dev)
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struct fw_device *device = fw_device(unit->device.parent);
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struct sbp2_device *sd;
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struct fw_csr_iterator ci;
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int i, key, value;
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struct Scsi_Host *host;
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int i, key, value, err;
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u32 model, firmware_revision;
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sd = kzalloc(sizeof *sd, GFP_KERNEL);
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if (sd == NULL)
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return -ENOMEM;
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err = -ENOMEM;
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host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd));
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if (host == NULL)
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goto fail;
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sd = (struct sbp2_device *) host->hostdata;
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unit->device.driver_data = sd;
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sd->unit = unit;
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INIT_LIST_HEAD(&sd->orb_list);
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@ -631,17 +636,18 @@ static int sbp2_probe(struct device *dev)
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sd->address_handler.address_callback = sbp2_status_write;
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sd->address_handler.callback_data = sd;
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if (fw_core_add_address_handler(&sd->address_handler,
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&fw_high_memory_region) < 0) {
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kfree(sd);
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return -EBUSY;
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}
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err = fw_core_add_address_handler(&sd->address_handler,
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&fw_high_memory_region);
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if (err < 0)
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goto fail_host;
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if (fw_device_enable_phys_dma(device) < 0) {
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fw_core_remove_address_handler(&sd->address_handler);
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kfree(sd);
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return -EBUSY;
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}
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err = fw_device_enable_phys_dma(device);
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if (err < 0)
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goto fail_address_handler;
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err = scsi_add_host(host, &unit->device);
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if (err < 0)
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goto fail_address_handler;
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/*
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* Scan unit directory to get management agent address,
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@ -695,6 +701,13 @@ static int sbp2_probe(struct device *dev)
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kref_get(&sd->kref);
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return 0;
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fail_address_handler:
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fw_core_remove_address_handler(&sd->address_handler);
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fail_host:
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scsi_host_put(host);
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fail:
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return err;
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}
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static int sbp2_remove(struct device *dev)
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@ -881,10 +894,10 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
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static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
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{
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struct fw_unit *unit =
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(struct fw_unit *)orb->cmd->device->host->hostdata[0];
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struct sbp2_device *sd =
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(struct sbp2_device *)orb->cmd->device->host->hostdata;
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struct fw_unit *unit = sd->unit;
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struct fw_device *device = fw_device(unit->device.parent);
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struct sbp2_device *sd = unit->device.driver_data;
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struct scatterlist *sg;
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int sg_len, l, i, j, count;
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size_t size;
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@ -950,10 +963,10 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
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static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb)
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{
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struct fw_unit *unit =
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(struct fw_unit *)orb->cmd->device->host->hostdata[0];
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struct sbp2_device *sd =
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(struct sbp2_device *)orb->cmd->device->host->hostdata;
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struct fw_unit *unit = sd->unit;
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struct fw_device *device = fw_device(unit->device.parent);
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struct sbp2_device *sd = unit->device.driver_data;
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/*
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* As for map_scatterlist, we need to fill in the high bits of
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@ -975,9 +988,10 @@ static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb)
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static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
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{
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struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0];
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struct sbp2_device *sd =
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(struct sbp2_device *)cmd->device->host->hostdata;
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struct fw_unit *unit = sd->unit;
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struct fw_device *device = fw_device(unit->device.parent);
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struct sbp2_device *sd = unit->device.driver_data;
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struct sbp2_command_orb *orb;
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/*
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@ -1067,8 +1081,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
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static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
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{
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struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0];
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struct sbp2_device *sd = unit->device.driver_data;
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struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata;
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sdev->allow_restart = 1;
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@ -1079,8 +1092,8 @@ static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
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static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
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{
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struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0];
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struct sbp2_device *sd = unit->device.driver_data;
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struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata;
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struct fw_unit *unit = sd->unit;
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sdev->use_10_for_rw = 1;
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@ -1103,7 +1116,9 @@ static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
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*/
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static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
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{
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struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0];
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struct sbp2_device *sd =
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(struct sbp2_device *)cmd->device->host->hostdata;
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struct fw_unit *unit = sd->unit;
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fw_notify("sbp2_scsi_abort\n");
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sbp2_agent_reset(unit);
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@ -1127,55 +1142,6 @@ static struct scsi_host_template scsi_driver_template = {
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.can_queue = 1,
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};
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static int add_scsi_devices(struct fw_unit *unit)
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{
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struct sbp2_device *sd = unit->device.driver_data;
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int retval, lun;
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if (sd->scsi_host != NULL)
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return 0;
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sd->scsi_host = scsi_host_alloc(&scsi_driver_template,
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sizeof(unsigned long));
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if (sd->scsi_host == NULL) {
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fw_error("failed to register scsi host\n");
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return -1;
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}
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sd->scsi_host->hostdata[0] = (unsigned long)unit;
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retval = scsi_add_host(sd->scsi_host, &unit->device);
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if (retval < 0) {
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fw_error("failed to add scsi host\n");
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scsi_host_put(sd->scsi_host);
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sd->scsi_host = NULL;
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return retval;
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}
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/* FIXME: Loop over luns here. */
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lun = 0;
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retval = scsi_add_device(sd->scsi_host, 0, 0, lun);
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if (retval < 0) {
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fw_error("failed to add scsi device\n");
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scsi_remove_host(sd->scsi_host);
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scsi_host_put(sd->scsi_host);
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sd->scsi_host = NULL;
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return retval;
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}
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return 0;
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}
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static void remove_scsi_devices(struct fw_unit *unit)
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{
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struct sbp2_device *sd = unit->device.driver_data;
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if (sd->scsi_host != NULL) {
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scsi_remove_host(sd->scsi_host);
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scsi_host_put(sd->scsi_host);
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}
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sd->scsi_host = NULL;
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}
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MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
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MODULE_DESCRIPTION("SCSI over IEEE1394");
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MODULE_LICENSE("GPL");
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