[PATCH net] octeontx2-af: debugsfs: fix pci device refcount leak

[PATCH net] octeontx2-af: debugsfs: fix pci device refcount leak

[Yang Yingliang]

As comment of pci_get_domain_bus_and_slot() says, it returns
a pci device with refcount increment, when finish using it,
the caller must decrement the reference count by calling
pci_dev_put().

So before returning from rvu_dbg_rvu_pf_cgx_map_display() or
cgx_print_dmac_flt(), pci_dev_put() is called to avoid refcount
leak.

Fixes: dbc52debf95f ("octeontx2-af: Debugfs support for DMAC filters")
Fixes: e2fb37303865 ("octeontx2-af: Display CGX, NIX and PF map in debugfs.")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index a1970ebedf95..f66dde2b0f92 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -880,6 +880,8 @@ static int rvu_dbg_rvu_pf_cgx_map_display(struct seq_file *filp, void *unused)
 		sprintf(lmac, "LMAC%d", lmac_id);
 		seq_printf(filp, "%s\t0x%x\t\tNIX%d\t\t%s\t%s\n",
 			   dev_name(&pdev->dev), pcifunc, blkid, cgx, lmac);
+
+		pci_dev_put(pdev);
 	}
 	return 0;
 }
@@ -2566,6 +2568,7 @@ static int cgx_print_dmac_flt(struct seq_file *s, int lmac_id)
 		}
 	}
 
+	pci_dev_put(pdev);
 	return 0;
 }
 
-- 
2.25.1

Re: [PATCH net] octeontx2-af: debugsfs: fix pci device refcount leak

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Thu, 17 Nov 2022 20:46:58 +0800 you wrote:
> As comment of pci_get_domain_bus_and_slot() says, it returns
> a pci device with refcount increment, when finish using it,
> the caller must decrement the reference count by calling
> pci_dev_put().
> 
> So before returning from rvu_dbg_rvu_pf_cgx_map_display() or
> cgx_print_dmac_flt(), pci_dev_put() is called to avoid refcount
> leak.
> 
> [...]

Here is the summary with links:
  - [net] octeontx2-af: debugsfs: fix pci device refcount leak
    https://git.kernel.org/netdev/net/c/d66608803aa2

You are awesome, thank you!
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