M'boumba Cedric Madianga 57b5a32135 dmaengine: stm32-dma: Fix null pointer dereference in stm32_dma_tx_status ...

chan->desc is always set to NULL when a DMA transfer is complete.
As a DMA transfer could be complete during the call of stm32_dma_tx_status,
we need to be sure that chan->desc is not NULL before using this variable
to avoid a null pointer deference issue.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Reviewed-by: Ludovic BARRE <ludovic.barre@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

2017-01-02 09:28:52 +05:30

31 KiB

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