linux-kernel - [PATCH 5.4 09/78] vfio/pci: Fix error return code in vfio_ecap

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Date:   Tue,  8 Jun 2021 20:26:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 09/78] vfio/pci: Fix error return code in vfio_ecap_init()

From: Zhen Lei <thunder.leizhen@...wei.com>

[ Upstream commit d1ce2c79156d3baf0830990ab06d296477b93c26 ]

The error code returned from vfio_ext_cap_len() is stored in 'len', not
in 'ret'.

Fixes: 89e1f7d4c66d ("vfio: Add PCI device driver")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@...dia.com>
Message-Id: <20210515020458.6771-1-thunder.leizhen@...wei.com>
Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/vfio/pci/vfio_pci_config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index bf32997c557f..50cd17fcf754 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -1576,7 +1576,7 @@ static int vfio_ecap_init(struct vfio_pci_device *vdev)
 			if (len == 0xFF) {
 				len = vfio_ext_cap_len(vdev, ecap, epos);
 				if (len < 0)
-					return ret;
+					return len;
 			}
 		}
 
-- 
2.30.2