6.1-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit ccb7cd3218e48665f3c7e19eede0da5f069c323d upstream.
Make sure to drop the reference taken to the sysmgr platform device when retrieving its driver data.
Note that holding a reference to a device does not prevent its driver data from going away.
Fixes: f36e789a1f8d ("mfd: altera-sysmgr: Add SOCFPGA System Manager") Cc: stable@vger.kernel.org # 5.2 Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Lee Jones lee@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mfd/altera-sysmgr.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/mfd/altera-sysmgr.c +++ b/drivers/mfd/altera-sysmgr.c @@ -118,6 +118,8 @@ struct regmap *altr_sysmgr_regmap_lookup
sysmgr = dev_get_drvdata(dev);
+ put_device(dev); + return sysmgr->regmap; } EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_phandle);