crypto: qat - refactor device restart logic

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 <[e-mail]>
Reviewed-by: Giovanni Cabiddu <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/qat/qat_common/adf_aer.c

···
 	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);

drivers/crypto/qat/qat_common/adf_common_drv.h

···
 
 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);

drivers/crypto/qat/qat_common/adf_init.c

···
 	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);