Messages in this thread Patch in this message | | | From | Dmitry Baryshkov <> | Subject | [PATCH v3] driver core: platform: don't oops in platform_shutdown() on unbound devices | Date | Sun, 13 Dec 2020 02:55:33 +0300 |
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On shutdown the driver core calls the bus' shutdown callback also for unbound devices. A driver's shutdown callback however is only called for devices bound to this driver. Commit 9c30921fe799 ("driver core: platform: use bus_type functions") changed the platform bus from driver callbacks to bus callbacks, so the shutdown function must be prepared to be called without a driver. Add the corresponding check in the shutdown function.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Fixes: 9c30921fe799 ("driver core: platform: use bus_type functions") --- drivers/base/platform.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 0358dc3ea3ad..e9477e0bbca5 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1351,9 +1351,13 @@ static int platform_remove(struct device *_dev) static void platform_shutdown(struct device *_dev) { - struct platform_driver *drv = to_platform_driver(_dev->driver); struct platform_device *dev = to_platform_device(_dev); + struct platform_driver *drv; + + if (!_dev->driver) + return; + drv = to_platform_driver(_dev->driver); if (drv->shutdown) drv->shutdown(dev); } -- 2.29.2
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