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Commit 285838eb authored by Stefan Richter's avatar Stefan Richter
Browse files

firewire: fw-sbp2: refactor workq and kref handling 



This somewhat reduces the size of firewire-sbp2.ko.

Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 85c5798b

drivers/firewire/fw-sbp2.c

+30 −26
Original line number Diff line number Diff line
@@ -628,6 +628,21 @@ static void sbp2_release_target(struct kref *kref) 


static struct workqueue_struct *sbp2_wq;



/*

 * Always get the target's kref when scheduling work on one its units.

 * Each workqueue job is responsible to call sbp2_target_put() upon return.

 */

static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)

{

	if (queue_delayed_work(sbp2_wq, &lu->work, delay))

		kref_get(&lu->tgt->kref);

}



static void sbp2_target_put(struct sbp2_target *tgt)

{

	kref_put(&tgt->kref, sbp2_release_target);

}



static void sbp2_reconnect(struct work_struct *work);



static void sbp2_login(struct work_struct *work)
@@ -649,16 +664,12 @@ static void sbp2_login(struct work_struct *work) 


	if (sbp2_send_management_orb(lu, node_id, generation,

				SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {

		if (lu->retries++ < 5) {

			if (queue_delayed_work(sbp2_wq, &lu->work,

					       DIV_ROUND_UP(HZ, 5)))

				kref_get(&lu->tgt->kref);

		} else {

		if (lu->retries++ < 5)

			sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));

		else

			fw_error("failed to login to %s LUN %04x\n",

				 unit->device.bus_id, lu->lun);

		}

		kref_put(&lu->tgt->kref, sbp2_release_target);

		return;

		goto out;

	}



	lu->generation        = generation;
@@ -700,7 +711,8 @@ static void sbp2_login(struct work_struct *work) 
		lu->sdev = sdev;

		scsi_device_put(sdev);

	}

	kref_put(&lu->tgt->kref, sbp2_release_target);

 out:

	sbp2_target_put(lu->tgt);

}



static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
@@ -865,18 +877,13 @@ static int sbp2_probe(struct device *dev) 


	get_device(&unit->device);



	/*

	 * We schedule work to do the login so we can easily

	 * reschedule retries. Always get the ref before scheduling

	 * work.

	 */

	/* Do the login in a workqueue so we can easily reschedule retries. */

	list_for_each_entry(lu, &tgt->lu_list, link)

		if (queue_delayed_work(sbp2_wq, &lu->work, 0))

			kref_get(&tgt->kref);

		sbp2_queue_work(lu, 0);

	return 0;



 fail_tgt_put:

	kref_put(&tgt->kref, sbp2_release_target);

	sbp2_target_put(tgt);

	return -ENOMEM;



 fail_shost_put:
@@ -889,7 +896,7 @@ static int sbp2_remove(struct device *dev) 
	struct fw_unit *unit = fw_unit(dev);

	struct sbp2_target *tgt = unit->device.driver_data;



	kref_put(&tgt->kref, sbp2_release_target);

	sbp2_target_put(tgt);

	return 0;

}
@@ -915,10 +922,8 @@ static void sbp2_reconnect(struct work_struct *work) 
			lu->retries = 0;

			PREPARE_DELAYED_WORK(&lu->work, sbp2_login);

		}

		if (queue_delayed_work(sbp2_wq, &lu->work, DIV_ROUND_UP(HZ, 5)))

			kref_get(&lu->tgt->kref);

		kref_put(&lu->tgt->kref, sbp2_release_target);

		return;

		sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));

		goto out;

	}



	lu->generation        = generation;
@@ -930,8 +935,8 @@ static void sbp2_reconnect(struct work_struct *work) 


	sbp2_agent_reset(lu);

	sbp2_cancel_orbs(lu);



	kref_put(&lu->tgt->kref, sbp2_release_target);

 out:

	sbp2_target_put(lu->tgt);

}



static void sbp2_update(struct fw_unit *unit)
@@ -947,8 +952,7 @@ static void sbp2_update(struct fw_unit *unit) 
	 */

	list_for_each_entry(lu, &tgt->lu_list, link) {

		lu->retries = 0;

		if (queue_delayed_work(sbp2_wq, &lu->work, 0))

			kref_get(&tgt->kref);

		sbp2_queue_work(lu, 0);

	}

}