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

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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>
This commit is contained in:
Andy Shevchenko 2016-03-18 16:24:54 +02:00 committed by Vinod Koul
parent b68fd09762
commit 925a7d045e
1 changed files with 2 additions and 0 deletions
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2
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->desc);
kfree(cdesc); kfree(cdesc);
dwc->cdesc = NULL;
clear_bit(DW_DMA_IS_CYCLIC, &dwc->flags); clear_bit(DW_DMA_IS_CYCLIC, &dwc->flags);
} }
EXPORT_SYMBOL(dw_dma_cyclic_free); EXPORT_SYMBOL(dw_dma_cyclic_free);