counter: Stop using dev_get_drvdata() to get the counter device
authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fri, 11 Mar 2022 00:18:09 +0000 (19:18 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 15 Mar 2022 18:24:13 +0000 (19:24 +0100)
commit01b44ef2bf6bc83df8a4703029fd611fbfc31c60
tree6456168b2e10f2f8e62987ca500d037b99583804
parent7e57714cd0ad2d5bb90e50b5096a0e671dec1ef3
counter: Stop using dev_get_drvdata() to get the counter device

dev_get_drvdata() returns NULL since commit b56346ddbd82 ("counter: Use
container_of instead of drvdata to track counter_device") which wrongly
claimed there were no users of drvdata. Convert to container_of() to
fix a null pointer dereference.

Reported-by: Oleksij Rempel <o.rempel@pengutronix.de>
Fixes: b56346ddbd82 ("counter: Use container_of instead of drvdata to track counter_device")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/all/20220204082556.370348-1-u.kleine-koenig@pengutronix.de/
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/4a14311a3b935b62b33e665a97ecaaf2f078228a.1646957732.git.vilhelm.gray@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/counter/counter-sysfs.c