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[v2,15/15] dmaengine: dw: set cdesc to NULL when free cyclic transfers

Message ID 1456157030-54677-16-git-send-email-andriy.shevchenko@linux.intel.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Andy Shevchenko Feb. 22, 2016, 4:03 p.m. UTC 
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: Mans Rullgard <mans@mansr.com>
---
 drivers/dma/dw/core.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index cce0619..14d0df7 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1485,6 +1485,8 @@  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);