linux-kernel - [PATCH v7 6/6] hisi_acc_vfio_pci: update function return values.

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Message-ID: <20250411035907.57488-7-liulongfang@huawei.com>
Date: Fri, 11 Apr 2025 11:59:07 +0800
From: Longfang Liu <liulongfang@...wei.com>
To: <alex.williamson@...hat.com>, <jgg@...dia.com>,
	<shameerali.kolothum.thodi@...wei.com>, <jonathan.cameron@...wei.com>
CC: <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...neuler.org>, <liulongfang@...wei.com>
Subject: [PATCH v7 6/6] hisi_acc_vfio_pci: update function return values.

In this driver file, many functions call sub-functions and use ret
to store the error code of the sub-functions.
However, instead of directly returning ret to the caller, they use a
converted error code, which prevents the end-user from clearly
understanding the root cause of the error.
Therefore, the code needs to be modified to directly return the error
code from the sub-functions.

Signed-off-by: Longfang Liu <liulongfang@...wei.com>
---
 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
index d12a350440d3..c63e302ac092 100644
--- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
+++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
@@ -392,7 +392,7 @@ static int vf_qm_check_match(struct hisi_acc_vf_core_device *hisi_acc_vdev,
 	ret = vf_qm_version_check(vf_data, dev);
 	if (ret) {
 		dev_err(dev, "failed to match ACC_DEV_MAGIC\n");
-		return -EINVAL;
+		return ret;
 	}
 
 	if (vf_data->dev_id != hisi_acc_vdev->vf_dev->device) {
@@ -404,7 +404,7 @@ static int vf_qm_check_match(struct hisi_acc_vf_core_device *hisi_acc_vdev,
 	ret = qm_get_vft(vf_qm, &vf_qm->qp_base);
 	if (ret <= 0) {
 		dev_err(dev, "failed to get vft qp nums\n");
-		return -EINVAL;
+		return ret;
 	}
 
 	if (ret != vf_data->qp_num) {
@@ -501,7 +501,7 @@ static int vf_qm_load_data(struct hisi_acc_vf_core_device *hisi_acc_vdev,
 	ret = qm_write_regs(qm, QM_VF_STATE, &vf_data->vf_qm_state, 1);
 	if (ret) {
 		dev_err(dev, "failed to write QM_VF_STATE\n");
-		return -EINVAL;
+		return ret;
 	}
 	hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state;
 
@@ -542,7 +542,7 @@ static int vf_qm_read_data(struct hisi_qm *vf_qm, struct acc_vf_data *vf_data)
 
 	ret = qm_get_regs(vf_qm, vf_data);
 	if (ret)
-		return -EINVAL;
+		return ret;
 
 	/* Every reg is 32 bit, the dma address is 64 bit. */
 	vf_data->eqe_dma = vf_data->qm_eqc_dw[QM_XQC_ADDR_HIGH];
@@ -556,13 +556,13 @@ static int vf_qm_read_data(struct hisi_qm *vf_qm, struct acc_vf_data *vf_data)
 	ret = qm_get_sqc(vf_qm, &vf_data->sqc_dma);
 	if (ret) {
 		dev_err(dev, "failed to read SQC addr!\n");
-		return -EINVAL;
+		return ret;
 	}
 
 	ret = qm_get_cqc(vf_qm, &vf_data->cqc_dma);
 	if (ret) {
 		dev_err(dev, "failed to read CQC addr!\n");
-		return -EINVAL;
+		return ret;
 	}
 
 	return 0;
@@ -588,7 +588,7 @@ static int vf_qm_state_save(struct hisi_acc_vf_core_device *hisi_acc_vdev,
 
 	ret = vf_qm_read_data(vf_qm, vf_data);
 	if (ret)
-		return -EINVAL;
+		return ret;
 
 	migf->total_length = sizeof(struct acc_vf_data);
 	/* Save eqc and aeqc interrupt information */
@@ -1379,7 +1379,7 @@ static int hisi_acc_vf_debug_check(struct seq_file *seq, struct vfio_device *vde
 	ret = qm_wait_dev_not_ready(vf_qm);
 	if (ret) {
 		seq_puts(seq, "VF device not ready!\n");
-		return -EBUSY;
+		return ret;
 	}
 
 	return 0;
-- 
2.24.0