driver_find_device_by_of_node() calls driver_find_device(), which calls get_device(). get_device() increments the device's reference count, so driver_find_device_by_of_node() returns a device with its reference count incremented. We need to release this reference after usage to avoid a reference leak.

Add put_device(dev) after dev_get_drvdata() to fix the reference leak.

Found via static analysis.

Fixes: f36e789a1f8d ("mfd: altera-sysmgr: Add SOCFPGA System Manager") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin linmq006@gmail.com --- drivers/mfd/altera-sysmgr.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c index fb5f988e61f3..cb66b2fff536 100644 --- a/drivers/mfd/altera-sysmgr.c +++ b/drivers/mfd/altera-sysmgr.c @@ -116,6 +116,7 @@ struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np, return ERR_PTR(-EPROBE_DEFER);

sysmgr = dev_get_drvdata(dev); + put_device(dev);

return sysmgr->regmap; }