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net: mvneta: bm: fix device reference leak on failed lookup

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Make sure to drop the reference taken to the buffer manager device when
attempting to look up its driver data before the driver has been bound.

Note that holding a reference to a device does not prevent its driver
data from going away.

Cc: stable+noautosel@kernel.org # untested fix to unlikely error path
Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Link: https://patch.msgid.link/20260709082713.829446-1-johan@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Johan Hovold
2026-07-21 11:14:08 -07:00
committed by Jakub Kicinski
parent 6deab902b4
commit ede0f99cef
1 changed files with 13 additions and 2 deletions
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drivers/net/ethernet/marvell/mvneta_bm.c
+13 -2
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@@ -397,9 +397,20 @@ static void mvneta_bm_put_sram(struct mvneta_bm *priv)
struct mvneta_bm *mvneta_bm_get(struct device_node *node)
{
struct platform_device *pdev = of_find_device_by_node(node);
struct platform_device *pdev;
struct mvneta_bm *priv;
return pdev ? platform_get_drvdata(pdev) : NULL;
pdev = of_find_device_by_node(node);
if (!pdev)
return NULL;
priv = platform_get_drvdata(pdev);
if (!priv) {
platform_device_put(pdev);
return NULL;
}
return priv;
}
EXPORT_SYMBOL_GPL(mvneta_bm_get);