drivers core: Free dma_range_map when driver probe failed

There will be memory leak if driver probe failed. Trace as below:
  backtrace:
    [<000000002415258f>] kmemleak_alloc+0x3c/0x50
    [<00000000f447ebe4>] __kmalloc+0x208/0x530
    [<0000000048bc7b3a>] of_dma_get_range+0xe4/0x1b0
    [<0000000041e39065>] of_dma_configure_id+0x58/0x27c
    [<000000006356866a>] platform_dma_configure+0x2c/0x40
    ......
    [<000000000afcf9b5>] ret_from_fork+0x10/0x3c

This issue is introduced by commit e0d0727("dma-mapping:
introduce DMA range map, supplanting dma_pfn_offset "). It doesn't
free dma_range_map when driver probe failed and cause above
memory leak. So, add code to free it in error path.

Fixes: e0d0727 ("dma-mapping: introduce DMA range map, supplanting dma_pfn_offset ")
Cc: [email protected]
Signed-off-by: Meng Li <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: limeng-linux

drivers/base/dd.c

@@ -619,6 +619,8 @@ static int really_probe(struct device *dev, struct device_driver *drv)
 	else if (drv->remove)
 		drv->remove(dev);
 probe_failed:
+	kfree(dev->dma_range_map);
+	dev->dma_range_map = NULL;
 	if (dev->bus)
 		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
 					     BUS_NOTIFY_DRIVER_NOT_BOUND, dev);