linux-kernel - [PATCH 4.4 270/312] net: ethernet: stmmac: dwmac-generic: fix probe error path

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Message-Id: <20200508123143.425078077@linuxfoundation.org>
Date:   Fri,  8 May 2020 14:34:21 +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, Johan Hovold <johan@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 270/312] net: ethernet: stmmac: dwmac-generic: fix probe error path

From: Johan Hovold <johan@...nel.org>

commit 939b20022765bc338b0f72cbf1eed60a907398d7 upstream.

Make sure to call any exit() callback to undo the effect of init()
before returning on late probe errors.

Fixes: cf3f047b9af4 ("stmmac: move hw init in the probe (v2)")
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/stmicro/stmmac/dwmac-generic.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-generic.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-generic.c
@@ -53,7 +53,17 @@ static int dwmac_generic_probe(struct pl
 			return ret;
 	}
 
-	return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+	if (ret)
+		goto err_exit;
+
+	return 0;
+
+err_exit:
+	if (plat_dat->exit)
+		plat_dat->exit(pdev, plat_dat->bsp_priv);
+
+	return ret;
 }
 
 static const struct of_device_id dwmac_generic_match[] = {