From: Julian Wiedmann <jwi@linux.ibm.com>
Date: Mon, 10 Feb 2020 14:58:07 +0100
Subject: s390/qdio: reduce access to cdev->private->qdio_data
Git-commit: 014816b66218d9f5f90e6d92951abc9d3749b4cd
Patch-mainline: v5.7-rc1
References: jsc#SLE-13690

Remove all usage of cdev->private->qdio_data that's buried deep in
internal code. This should only be used by the exported driver API,
which can then pass around a proper qdio_irq pointer.

Also trivially merge some initializations with their definitions.

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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/s390/cio/qdio.h       |    2 +-
 drivers/s390/cio/qdio_main.c  |   13 +++++--------
 drivers/s390/cio/qdio_setup.c |    3 +--
 3 files changed, 7 insertions(+), 11 deletions(-)

--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -391,7 +391,7 @@ void qdio_setup_ssqd_info(struct qdio_ir
 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_initialize *init_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_release_memory(struct qdio_irq *irq_ptr);
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -1100,9 +1100,8 @@ int qdio_get_ssqd_desc(struct ccw_device
 }
 EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc);
 
-static void qdio_shutdown_queues(struct ccw_device *cdev)
+static void qdio_shutdown_queues(struct qdio_irq *irq_ptr)
 {
-	struct qdio_irq *irq_ptr = cdev->private->qdio_data;
 	struct qdio_q *q;
 	int i;
 
@@ -1150,7 +1149,7 @@ int qdio_shutdown(struct ccw_device *cde
 	qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
 
 	tiqdio_remove_device(irq_ptr);
-	qdio_shutdown_queues(cdev);
+	qdio_shutdown_queues(irq_ptr);
 	qdio_shutdown_debug_entries(irq_ptr);
 
 	/* cleanup subchannel */
@@ -1311,19 +1310,18 @@ static void qdio_detect_hsicq(struct qdi
 int qdio_establish(struct qdio_initialize *init_data)
 {
 	struct ccw_device *cdev = init_data->cdev;
+	struct qdio_irq *irq_ptr = cdev->private->qdio_data;
 	struct subchannel_id schid;
-	struct qdio_irq *irq_ptr;
 	int rc;
 
 	ccw_device_get_schid(cdev, &schid);
 	DBF_EVENT("qestablish:%4x", schid.sch_no);
 
-	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
 
 	mutex_lock(&irq_ptr->setup_mutex);
-	qdio_setup_irq(init_data);
+	qdio_setup_irq(irq_ptr, init_data);
 
 	rc = qdio_establish_thinint(irq_ptr);
 	if (rc) {
@@ -1381,14 +1379,13 @@ EXPORT_SYMBOL_GPL(qdio_establish);
  */
 int qdio_activate(struct ccw_device *cdev)
 {
+	struct qdio_irq *irq_ptr = cdev->private->qdio_data;
 	struct subchannel_id schid;
-	struct qdio_irq *irq_ptr;
 	int rc;
 
 	ccw_device_get_schid(cdev, &schid);
 	DBF_EVENT("qactivate:%4x", schid.sch_no);
 
-	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
 
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -449,11 +449,10 @@ static void setup_qib(struct qdio_irq *i
 	memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
 }
 
-int qdio_setup_irq(struct qdio_initialize *init_data)
+int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
 {
 	struct ciw *ciw;
 	struct ccw_device *cdev = init_data->cdev;
-	struct qdio_irq *irq_ptr = cdev->private->qdio_data;
 
 	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
 	memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));