[PATCH] virtio: vdpa: Fix reference count leak in octep_sriov_enable()

[Miaoqian Lin]

pci_get_device() will increase the reference count for the returned
pci_dev, and also decrease the reference count for the input parameter
from if it is not NULL.

If we break the loop in  with 'vf_pdev' not NULL. We
need to call pci_dev_put() to decrease the reference count.

Found via static anlaysis and this is similar to commit c508eb042d97
("perf/x86/intel/uncore: Fix reference count leak in sad_cfg_iio_topology()")

Fixes: 8b6c724cdab8 ("virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices")
Cc: sta...@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq...@gmail.com>
---
 drivers/vdpa/octeon_ep/octep_vdpa_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/vdpa/octeon_ep/octep_vdpa_main.c 
b/drivers/vdpa/octeon_ep/octep_vdpa_main.c
index 9e8d07078606..31a02e7fd7f2 100644
--- a/drivers/vdpa/octeon_ep/octep_vdpa_main.c
+++ b/drivers/vdpa/octeon_ep/octep_vdpa_main.c
@@ -736,6 +736,7 @@ static int octep_sriov_enable(struct pci_dev *pdev, int 
num_vfs)
                octep_vdpa_assign_barspace(vf_pdev, pdev, index);
                if (++index == num_vfs) {
                        done = true;
+                       pci_dev_put(vf_pdev);
                        break;
                }
        }
-- 
2.39.5 (Apple Git-154)