linux-kernel - [PATCH 1/2] eni_vdpa: Fix an error handling path in 'eni_vdpa

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Message-Id: <f6b2d087ca3840604b4e711a208d35b5d6285cb4.1636301587.git.christophe.jaillet@wanadoo.fr>
Date:   Sun,  7 Nov 2021 17:14:46 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     mst@...hat.com, jasowang@...hat.com, wuzongyong@...ux.alibaba.com,
        arnd@...db.de
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 1/2] eni_vdpa: Fix an error handling path in 'eni_vdpa_probe()'

In the error handling path, a successful 'vp_legacy_probe()' should be
balanced by a corresponding 'vp_legacy_remove()' call, as already done in
the remove function.

Add the missing call and update gotos accordingly.

Fixes: e85087beedca ("eni_vdpa: add vDPA driver for Alibaba ENI")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/vdpa/alibaba/eni_vdpa.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/alibaba/eni_vdpa.c b/drivers/vdpa/alibaba/eni_vdpa.c
index 3f788794571a..12b3db6b4517 100644
--- a/drivers/vdpa/alibaba/eni_vdpa.c
+++ b/drivers/vdpa/alibaba/eni_vdpa.c
@@ -501,7 +501,7 @@ static int eni_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (!eni_vdpa->vring) {
 		ret = -ENOMEM;
 		ENI_ERR(pdev, "failed to allocate virtqueues\n");
-		goto err;
+		goto err_remove_vp_legacy;
 	}
 
 	for (i = 0; i < eni_vdpa->queues; i++) {
@@ -513,11 +513,13 @@ static int eni_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	ret = vdpa_register_device(&eni_vdpa->vdpa, eni_vdpa->queues);
 	if (ret) {
 		ENI_ERR(pdev, "failed to register to vdpa bus\n");
-		goto err;
+		goto err_remove_vp_legacy;
 	}
 
 	return 0;
 
+err_remove_vp_legacy:
+	vp_legacy_remove(&eni_vdpa->ldev);
 err:
 	put_device(&eni_vdpa->vdpa.dev);
 	return ret;
-- 
2.30.2