tree c2361be6f6a778dc769d77aa3e9ebfe0ebea366d
parent ec5e1a4b8faa6a3522171a185a5c6ac9609e14b4
author Jean Delvare <khali@linux-fr.org> 1181649439 +0200
committer Mark M. Hoffman <mhoffman@lightlink.com> 1184869334 -0400

hwmon: Fix a potential race condition on unload

Fix a potential race condition when some hardware monitoring platform
drivers are being unloaded. I believe that the driver data pointer
shouldn't be cleared before all the sysfs files are removed, otherwise
a sysfs callback might attempt to dereference a NULL pointer. I'm not
sure exactly what the driver core protects drivers against, so let's
play it safe.

While we're here, clear the driver data pointer when probe fails, so
as to not leave an invalid pointer behind us.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>