dmaengine: dw: set cdesc to NULL when free cyclic transfers · 925a7d045e - Gogs: Go Git Service GfA electronic

dmaengine: dw: set cdesc to NULL when free cyclic transfers

To be sure we have the cyclic transfers already gone we set cdesc to NULL. It
will prevent the double free.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

Andy Shevchenko 9 years ago

parent

b68fd09762

commit

925a7d045e

1 changed files with 2 additions and 0 deletions

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drivers/dma/dw/core.c
							 
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				@@ -1522,6 +1522,8 @@ void dw_dma_cyclic_free(struct dma_chan *chan)
			
				 	kfree(cdesc->desc);
			
				 	kfree(cdesc);
			
				+	dwc->cdesc = NULL;
			
				+
			
				 	clear_bit(DW_DMA_IS_CYCLIC, &dwc->flags);
			
				 }
			
				 EXPORT_SYMBOL(dw_dma_cyclic_free);