From: Thierry Reding treding@nvidia.com
When a driver's ->probe() function fails, the host1x bus must not call its ->remove() function because the driver will already have cleaned up in the error handling path in ->probe().
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/host1x/bus.c | 9 +++++++-- include/linux/host1x.h | 2 ++ 2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index aaf54859adb0..e4182e68e29c 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -116,7 +116,10 @@ static void host1x_subdev_register(struct host1x_device *device, if (list_empty(&device->subdevs)) { err = device->driver->probe(device); if (err < 0) - dev_err(&device->dev, "probe failed: %d\n", err); + dev_err(&device->dev, "probe failed for %ps: %d\n", + device->driver, err); + else + device->bound = true; } }
@@ -130,10 +133,12 @@ static void __host1x_subdev_unregister(struct host1x_device *device, * If all subdevices have been activated, we're about to remove the * first active subdevice, so unload the driver first. */ - if (list_empty(&device->subdevs)) { + if (list_empty(&device->subdevs) && device->bound) { err = device->driver->remove(device); if (err < 0) dev_err(&device->dev, "remove failed: %d\n", err); + + device->bound = false; }
/* diff --git a/include/linux/host1x.h b/include/linux/host1x.h index bb9840fd1e18..7890b553d12e 100644 --- a/include/linux/host1x.h +++ b/include/linux/host1x.h @@ -272,6 +272,8 @@ struct host1x_device {
struct mutex clients_lock; struct list_head clients; + + bool bound; };
static inline struct host1x_device *to_host1x_device(struct device *dev)