s390/qdio: set qdio_irq->cdev at allocation time

Set up qdio_irq->cdev right when the qdio_irq struct is allocated, so
that all subsequent code can rely on this pointer.

Then convert two helper functions to not pass a cdev parameter around.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

5 files changed, 15 insertions, 17 deletions

diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 8564e8a8e359..098bf8c9bbec 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -391,8 +391,7 @@ int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
 			struct subchannel_id *schid,
 			struct qdio_ssqd_desc *data);
 int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data);
-void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
-				struct ccw_device *cdev);
+void qdio_print_subchannel_info(struct qdio_irq *irq_ptr);
 void qdio_release_memory(struct qdio_irq *irq_ptr);
 int qdio_setup_init(void);
 void qdio_setup_exit(void);
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index 8544faddf80c..f21fb406bef0 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -81,7 +81,7 @@ int qdio_allocate_dbf(struct qdio_initialize *init_data,
 
 	/* allocate trace view for the interface */
 	snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s",
-					dev_name(&init_data->cdev->dev));
+		 dev_name(&irq_ptr->cdev->dev));
 	irq_ptr->debug_area = qdio_get_dbf_entry(text);
 	if (irq_ptr->debug_area)
 		DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf reused");
@@ -311,16 +311,16 @@ static void setup_debugfs_entry(struct dentry *parent, struct qdio_q *q)
 	debugfs_create_file(name, 0444, parent, q, &qstat_fops);
 }
 
-void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
+void qdio_setup_debug_entries(struct qdio_irq *irq_ptr)
 {
 	struct qdio_q *q;
 	int i;
 
-	irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
+	irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&irq_ptr->cdev->dev),
 						  debugfs_root);
 	debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
 			    irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops);
-	debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, cdev,
+	debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, irq_ptr->cdev,
 			    &ssqd_fops);
 
 	for_each_input_queue(irq_ptr, q, i)
diff --git a/drivers/s390/cio/qdio_debug.h b/drivers/s390/cio/qdio_debug.h
index f85f5fa7cefc..122450ba6b90 100644
--- a/drivers/s390/cio/qdio_debug.h
+++ b/drivers/s390/cio/qdio_debug.h
@@ -66,8 +66,7 @@ static inline void DBF_DEV_HEX(struct qdio_irq *dev, void *addr,
 
 int qdio_allocate_dbf(struct qdio_initialize *init_data,
 		       struct qdio_irq *irq_ptr);
-void qdio_setup_debug_entries(struct qdio_irq *irq_ptr,
-			      struct ccw_device *cdev);
+void qdio_setup_debug_entries(struct qdio_irq *irq_ptr);
 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr);
 int qdio_debug_init(void);
 void qdio_debug_exit(void);
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 2886b95f4741..e93155dbe887 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -1229,10 +1229,11 @@ EXPORT_SYMBOL_GPL(qdio_free);
  */
 int qdio_allocate(struct qdio_initialize *init_data)
 {
+	struct ccw_device *cdev = init_data->cdev;
 	struct subchannel_id schid;
 	struct qdio_irq *irq_ptr;
 
-	ccw_device_get_schid(init_data->cdev, &schid);
+	ccw_device_get_schid(cdev, &schid);
 	DBF_EVENT("qallocate:%4x", schid.sch_no);
 
 	if ((init_data->no_input_qs && !init_data->input_handler) ||
@@ -1252,6 +1253,7 @@ int qdio_allocate(struct qdio_initialize *init_data)
 	if (!irq_ptr)
 		goto out_err;
 
+	irq_ptr->cdev = cdev;
 	mutex_init(&irq_ptr->setup_mutex);
 	if (qdio_allocate_dbf(init_data, irq_ptr))
 		goto out_rel;
@@ -1276,7 +1278,7 @@ int qdio_allocate(struct qdio_initialize *init_data)
 		goto out_rel;
 
 	INIT_LIST_HEAD(&irq_ptr->entry);
-	init_data->cdev->private->qdio_data = irq_ptr;
+	cdev->private->qdio_data = irq_ptr;
 	qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
 	return 0;
 out_rel:
@@ -1372,8 +1374,8 @@ int qdio_establish(struct qdio_initialize *init_data)
 	qdio_init_buf_states(irq_ptr);
 
 	mutex_unlock(&irq_ptr->setup_mutex);
-	qdio_print_subchannel_info(irq_ptr, cdev);
-	qdio_setup_debug_entries(irq_ptr, cdev);
+	qdio_print_subchannel_info(irq_ptr);
+	qdio_setup_debug_entries(irq_ptr);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(qdio_establish);
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index ad04947a0032..e1b7a9118f9d 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -452,8 +452,8 @@ static void setup_qib(struct qdio_irq *irq_ptr,
 
 int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
 {
+	struct ccw_device *cdev = irq_ptr->cdev;
 	struct ciw *ciw;
-	struct ccw_device *cdev = init_data->cdev;
 
 	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
 	memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
@@ -471,7 +471,6 @@ int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
 	irq_ptr->int_parm = init_data->int_parm;
 	irq_ptr->nr_input_qs = init_data->no_input_qs;
 	irq_ptr->nr_output_qs = init_data->no_output_qs;
-	irq_ptr->cdev = cdev;
 	irq_ptr->scan_threshold = init_data->scan_threshold;
 	ccw_device_get_schid(cdev, &irq_ptr->schid);
 	setup_queues(irq_ptr, init_data);
@@ -511,14 +510,13 @@ int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
 	return 0;
 }
 
-void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
-				struct ccw_device *cdev)
+void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
 {
 	char s[80];
 
 	snprintf(s, 80, "qdio: %s %s on SC %x using "
 		 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n",
-		 dev_name(&cdev->dev),
+		 dev_name(&irq_ptr->cdev->dev),
 		 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
 			((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
 		 irq_ptr->schid.sch_no,