[PATCH 4/5] crypto: qat - refactor device restart logic

[Shashank Gupta <shashank.gupta@xxxxxxxxx>]

Refactor the restart logic by moving it into the function
adf_dev_restart() which uses the safe function adf_dev_up() and
adf_dev_down().

This commit does not implement any functional change.

Signed-off-by: Shashank Gupta <shashank.gupta@xxxxxxxxx>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
---
 drivers/crypto/qat/qat_common/adf_aer.c        |  4 +---
 drivers/crypto/qat/qat_common/adf_common_drv.h |  1 +
 drivers/crypto/qat/qat_common/adf_init.c       | 18 ++++++++++++++++++
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/adf_aer.c b/drivers/crypto/qat/qat_common/adf_aer.c
index fe9bb2f3536a..9fa76c527051 100644
--- a/drivers/crypto/qat/qat_common/adf_aer.c
+++ b/drivers/crypto/qat/qat_common/adf_aer.c
@@ -90,9 +90,7 @@ static void adf_device_reset_worker(struct work_struct *work)
 	struct adf_accel_dev *accel_dev = reset_data->accel_dev;
 
 	adf_dev_restarting_notify(accel_dev);
-	adf_dev_stop(accel_dev);
-	adf_dev_shutdown(accel_dev);
-	if (adf_dev_init(accel_dev) || adf_dev_start(accel_dev)) {
+	if (adf_dev_restart(accel_dev)) {
 		/* The device hanged and we can't restart it so stop here */
 		dev_err(&GET_DEV(accel_dev), "Restart device failed\n");
 		kfree(reset_data);
diff --git a/drivers/crypto/qat/qat_common/adf_common_drv.h b/drivers/crypto/qat/qat_common/adf_common_drv.h
index 4bf1fceb7052..3666109b6320 100644
--- a/drivers/crypto/qat/qat_common/adf_common_drv.h
+++ b/drivers/crypto/qat/qat_common/adf_common_drv.h
@@ -60,6 +60,7 @@ int adf_dev_shutdown_cache_cfg(struct adf_accel_dev *accel_dev);
 
 int adf_dev_up(struct adf_accel_dev *accel_dev, bool init_config);
 int adf_dev_down(struct adf_accel_dev *accel_dev, bool cache_config);
+int adf_dev_restart(struct adf_accel_dev *accel_dev);
 
 void adf_devmgr_update_class_index(struct adf_hw_device_data *hw_data);
 void adf_clean_vf_map(bool);
diff --git a/drivers/crypto/qat/qat_common/adf_init.c b/drivers/crypto/qat/qat_common/adf_init.c
index 988cffd0b833..11ade5d8e4a0 100644
--- a/drivers/crypto/qat/qat_common/adf_init.c
+++ b/drivers/crypto/qat/qat_common/adf_init.c
@@ -464,3 +464,21 @@ int adf_dev_up(struct adf_accel_dev *accel_dev, bool config)
 	return ret;
 }
 EXPORT_SYMBOL_GPL(adf_dev_up);
+
+int adf_dev_restart(struct adf_accel_dev *accel_dev)
+{
+	int ret = 0;
+
+	if (!accel_dev)
+		return -EFAULT;
+
+	adf_dev_down(accel_dev, false);
+
+	ret = adf_dev_up(accel_dev, false);
+	/* if device is already up return success*/
+	if (ret == -EALREADY)
+		return 0;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(adf_dev_restart);
-- 
2.16.4