sdio: fix reference counting in sdio_remove_func()

[pandora-kernel.git] / drivers / mmc / core / sdio_bus.c

diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index d37464e..9e060c8 100644 (file)
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -248,12 +248,15 @@ int sdio_add_func(struct sdio_func *func)
 /*
  * Unregister a SDIO function with the driver model, and
  * (eventually) free it.
+ * This function can be called through error paths where sdio_add_func() was
+ * never executed (because a failure occurred at an earlier point).
  */
 void sdio_remove_func(struct sdio_func *func)
 {
-       if (sdio_func_present(func))
-               device_del(&func->dev);
+       if (!sdio_func_present(func))
+               return;
 
+       device_del(&func->dev);
        put_device(&func->dev);
 }