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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Subbaraya Sundeep <sbhatta@marvell.com>,
        Sunil Goutham <sgoutham@marvell.com>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.16 0423/1039] octeontx2-af: Increment ptp refcount before use
Date:   Mon, 24 Jan 2022 19:36:52 +0100
Message-Id: <20220124184139.523946948@linuxfoundation.org>
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From: Subbaraya Sundeep <sbhatta@marvell.com>

[ Upstream commit 93440f4888cf049dbd22b41aaf94d2e2153b3eb8 ]

Before using the ptp pci device by AF driver increment
the reference count of it.

Fixes: a8b90c9d26d6 ("octeontx2-af: Add PTP device id for CN10K and 95O silcons")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/marvell/octeontx2/af/ptp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/ptp.c b/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
index d6321de3cc171..e682b7bfde640 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
@@ -60,6 +60,8 @@ struct ptp *ptp_get(void)
 	/* Check driver is bound to PTP block */
 	if (!ptp)
 		ptp = ERR_PTR(-EPROBE_DEFER);
+	else
+		pci_dev_get(ptp->pdev);
 
 	return ptp;
 }
-- 
2.34.1