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staging: gasket: hold mutex on gasket driver unregistration

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Take the global mutex on driver unregistration updates for proper
ordering of updates and consistent access procedures.

Signed-off-by: Zhongze Hu <frankhu@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Todd Poynor
2018-07-17 13:56:46 -07:00
committed by Alex Van Damme
parent dc5522d1dc
commit d57203b516
1 changed files with 4 additions and 0 deletions
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4
gasket_core.c
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@@ -371,7 +371,9 @@ fail1:
class_destroy(internal->class);
unregister_gasket_driver:
mutex_lock(&g_mutex);
g_descs[desc_idx].driver_desc = NULL;
mutex_unlock(&g_mutex);
return ret;
}
EXPORT_SYMBOL(gasket_register_device);
@@ -408,7 +410,9 @@ void gasket_unregister_device(const struct gasket_driver_desc *driver_desc)
class_destroy(internal_desc->class);
/* Finally, effectively "remove" the driver. */
mutex_lock(&g_mutex);
g_descs[desc_idx].driver_desc = NULL;
mutex_unlock(&g_mutex);
gasket_nodev_info("removed %s driver", driver_desc->name);
}